What are the cheapest airlines to fly from Region of Ontario to London one-way?

For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as C$ 364. Users have also found prices from C$ 367 and C$ 368 on Air Transat and Porter Airlines, respectively.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Region of Ontario to London?

The most popular flight routes from Region of Ontario to London are Toronto Pearson Intl - London Heathrow, Toronto Pearson Intl - London Gatwick and Montreal Pierre Elliott Trudeau Intl - London Heathrow.

What are the cheapest flights from Region of Ontario to London?

On average you can expect to pay C$ 2,230 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 415 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 713.

What are the most reliable airlines from Region of Ontario to London?

Consider Croatia Airlines (88%), KLM (87%) or Air France (87%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to London.

What are the most popular airlines that fly from Region of Ontario to London?

When booking a flight from Region of Ontario to London, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

How far in advance should I book a flight from Region of Ontario to London?

Travellers have found it’s best to book a flight 55 days in advance to save up to 14% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 55 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Region of Ontario to London 1-2 weeks in advance for as low as C$ 837, or C$ 1,135 for flights within the next 24 hours.

What is the cheapest month to fly from Region of Ontario to London?

February can be a great time to fly to London from Region of Ontario with a flight ticket averaging about C$ 849. Cheapflights users have found deals in the month of February for as cheap as C$ 527. The most expensive prices can be found in the month of December.

Can I find deals for flights from Ontario to London that include hotel bookings?

Yes. In addition to deals on Ontario to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.

Can I find deals for business class flights from Ontario to London?

Yes. Cheapflights offers flight deals from Ontario to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 364+ Flights from Ontario to London

Q: How much does it cost to fly round-trip from Region of Ontario to London?

Airfare is below average for this route at the moment. Region of Ontario to London flights typically cost between C$ 920 and C$ 1,141 in September. The cheapest round-trip price found within the last 3 days was C$ 735 on Air Canada (8 Sep-14 Sep).

Cheap flight deals from Ontario to London

Round-trip from	C$ 735
One-way from	C$ 364
Popular in	December
Cheapest in	February
Average price	C$ 1,062
Good round-trip deal	C$ 817 or less
Good one-way deal	C$ 369 or less

Air Canada
13/9-20/9
2 total stops
20h 20m total
Ontario to London

Search Deals

TAP AIR PORTUGAL
15/10
1 total stop
11h 50m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (C$ 47 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Price to beat on a round-trip flight from Ontario to London (LON).

Search Deals

Price to beat on a one-way flight from Ontario to London (LON).

Search Deals

Find flight deals from Ontario to London

Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.

Mon 8/94:00 p.m.YYZ - LHR

1 stop9h 30mAir Canada

Sun 14/98:30 a.m.LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 30/7C$ 735

Fri 31/1010:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Mon 10/1111:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 30/7C$ 735

Fri 26/99:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Sun 5/1011:35 a.m.LGW - YTZ

1 stop13h 35mAir Transat

Deal found 30/7C$ 737

Mon 1/127:45 p.m.YYZ - LHR

1 stop10h 05mIcelandair

Thu 11/1212:15 p.m.LHR - YYZ

1 stop11h 00mIcelandair

Deal found 30/7C$ 738

Mon 25/810:10 p.m.YYZ - LGW

1 stop17h 45mMultiple Airlines

Wed 17/99:40 a.m.LGW - YYZ

Nonstop8h 05mMultiple Airlines

Deal found 29/7C$ 739

Thu 18/911:55 p.m.YYZ - STN

1 stop14h 35mMultiple Airlines

Fri 26/96:40 a.m.STN - YYZ

1 stop13h 00mMultiple Airlines

Deal found 29/7C$ 739

Fri 12/910:25 a.m.YTZ - LHR

1 stop15h 05mAir Canada

Tue 16/99:30 a.m.LHR - YTZ

1 stop13h 15mAir Canada

Deal found 30/7C$ 741

Sun 7/910:00 a.m.YUL - LGW

1 stop16h 55mAir Transat

Tue 23/911:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 27/7C$ 742

Wed 15/1010:30 p.m.YYZ - LHR

Nonstop7h 10mDelta

Wed 22/109:55 a.m.LHR - YYZ

1 stop15h 00mDelta

Deal found 30/7C$ 742

Sat 6/99:55 p.m.YUL - LHR

Nonstop6h 40mAir Canada

Tue 23/96:00 a.m.LHR - YUL

2 stops17h 20mAir Canada

Deal found 27/7C$ 742

Mon 22/98:15 p.m.YUL - LGW

1 stop30h 40mPorter Airlines

Mon 13/1012:40 p.m.LGW - YUL

1 stop11h 40mPorter Airlines

Deal found 27/7C$ 743

Thu 4/911:55 p.m.YYZ - LTN

1 stop11h 40mMultiple Airlines

Fri 5/99:05 p.m.LTN - YYZ

2 stops24h 45mMultiple Airlines

Deal found 29/7C$ 743

Best flights from Ontario to London
Discover carefully curated flight deals from Ontario to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 30 July 2025.

Mon 8/94:00 p.m.YYZ - LHR

1 stop9h 30mAir Canada

Sun 14/98:30 a.m.LHR - YYZ

Nonstop7h 55mAir Canada

Deal found 30/7C$ 735

Fri 31/1010:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Tue 11/1111:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 30/7C$ 735

Mon 1/127:45 p.m.YYZ - LHR

1 stop10h 05mIcelandair

Thu 11/1212:15 p.m.LHR - YYZ

1 stop11h 00mIcelandair

Deal found 30/7C$ 738

Mon 25/810:10 p.m.YYZ - LGW

1 stop17h 45mMultiple Airlines

Wed 17/99:40 a.m.LGW - YYZ

Nonstop8h 05mMultiple Airlines

Deal found 29/7C$ 739

Wed 15/1010:30 p.m.YYZ - LHR

Nonstop7h 10mDelta

Wed 22/109:55 a.m.LHR - YYZ

1 stop15h 00mDelta

Deal found 30/7C$ 742

Mon 22/98:15 p.m.YUL - LGW

1 stop30h 40mPorter Airlines

Mon 13/1012:40 p.m.LGW - YUL

1 stop11h 40mPorter Airlines

Deal found 27/7C$ 743

Mon 8/96:20 p.m.YYZ - LHR

Nonstop7h 15mLufthansa

Sun 14/98:30 a.m.LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 30/7C$ 746

Fri 26/96:05 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Sun 7/1211:40 a.m.LHR - YYZ

Nonstop8h 10mBritish Airways

Deal found 30/7C$ 748

Wed 12/114:45 p.m.YUL - LGW

1 stop20h 05mSWISS

Fri 21/116:40 p.m.LGW - YUL

1 stop25h 30mSWISS

Deal found 29/7C$ 755

Mon 22/910:55 a.m.YYZ - LHR

1 stop14h 25mIberia

Tue 23/911:30 a.m.LHR - YYZ

2 stops39h 00mIberia

Deal found 29/7C$ 760

Mon 1/97:19 a.m.YYZ - LGW

1 stop19h 51mAmerican Airlines

Mon 8/93:05 p.m.LGW - YYZ

1 stop11h 25mAmerican Airlines

Deal found 29/7C$ 764

Thu 20/116:30 p.m.YYZ - LHR

1 stop32h 50mAustrian Airlines

Sun 23/116:00 a.m.LHR - YYZ

2 stops39h 10mAustrian Airlines

Deal found 29/7C$ 768

Direct flights from Ontario to London
Explore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 July 2025.

Mon 8/96:05 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Mon 6/105:15 p.m.LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 29/7C$ 741

Fri 17/1010:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Sun 26/1011:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 30/7C$ 741

Thu 18/910:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Fri 26/911:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 29/7C$ 745

Mon 8/96:20 p.m.YYZ - LHR

Nonstop7h 15mLufthansa

Sun 14/98:30 a.m.LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 30/7C$ 746

Wed 3/99:55 p.m.YUL - LHR

Nonstop6h 40mAir Canada

Wed 10/99:30 a.m.LHR - YUL

Nonstop7h 10mAir Canada

Deal found 29/7C$ 748

Wed 1/1010:30 p.m.YYZ - LHR

Nonstop7h 10mDelta

Tue 14/105:50 p.m.LHR - YYZ

Nonstop7h 50mDelta

Deal found 30/7C$ 750

Tue 16/97:50 p.m.YYZ - LGW

Nonstop7h 05mPorter Airlines

Wed 24/99:40 a.m.LGW - YYZ

Nonstop8h 05mPorter Airlines

Deal found 28/7C$ 750

Sun 23/118:40 p.m.YUL - LHR

Nonstop6h 50mBritish Airways

Sat 29/114:10 p.m.LHR - YUL

Nonstop7h 35mBritish Airways

Deal found 29/7C$ 753

Wed 3/99:55 p.m.YUL - LHR

Nonstop6h 40mLufthansa

Wed 10/99:30 a.m.LHR - YUL

Nonstop7h 10mLufthansa

Deal found 30/7C$ 755

Wed 10/910:05 p.m.YUL - LGW

Nonstop6h 45mPorter Airlines

Mon 22/911:35 a.m.LGW - YUL

Nonstop7h 40mPorter Airlines

Deal found 28/7C$ 761

Mon 15/910:05 p.m.YUL - LGW

Nonstop6h 45mMultiple Airlines

Fri 26/911:35 a.m.LGW - YUL

Nonstop7h 40mMultiple Airlines

Deal found 29/7C$ 766

Wed 1/106:20 p.m.YYZ - LHR

Nonstop7h 15mAir Canada

Thu 16/105:40 p.m.LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 29/7C$ 766

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 30 July 2025 and is based on user searches.

Mon 4/85:35 p.m.YYZ - STN

2 stops33h 25mMultiple Airlines

Tue 23/910:35 p.m.STN - YYZ

1 stop21h 05mMultiple Airlines

Deal found 29/7C$ 757

Mon 4/85:50 p.m.YYZ - LGW

1 stop16h 45mMultiple Airlines

Wed 3/911:35 a.m.LGW - YYZ

1 stop10h 50mMultiple Airlines

Deal found 27/7C$ 783

Mon 4/810:10 p.m.YYZ - LTN

1 stop18h 15mMultiple Airlines

Thu 18/98:45 a.m.LTN - YYZ

1 stop10h 25mMultiple Airlines

Deal found 29/7C$ 811

Mon 4/85:20 p.m.YYZ - LHR

1 stop10h 45mAer Lingus

Wed 26/119:50 a.m.LHR - YYZ

1 stop11h 05mAer Lingus

Deal found 28/7C$ 835

Mon 4/811:45 p.m.YYZ - LHR

Nonstop7h 05mMultiple Airlines

Wed 3/95:40 p.m.LHR - YYZ

1 stop10h 30mMultiple Airlines

Deal found 27/7C$ 892

Tue 5/86:55 p.m.YTZ - LGW

1 stop9h 55mPorter Airlines

Wed 10/911:35 a.m.LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 28/7C$ 786

Tue 5/810:45 p.m.YYZ - LGW

Nonstop7h 00mPorter Airlines

Wed 10/99:40 a.m.LGW - YYZ

Nonstop8h 05mPorter Airlines

Deal found 28/7C$ 796

Tue 5/86:35 p.m.YYZ - LGW

1 stop10h 15mAir Transat

Wed 10/911:35 a.m.LGW - YYZ

1 stop14h 55mAir Transat

Deal found 28/7C$ 815

Tue 5/89:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Thu 4/911:35 a.m.LGW - YTZ

1 stop11h 35mAir Transat

Deal found 29/7C$ 840

Tue 5/87:25 p.m.YYZ - LHR

1 stop12h 05mAmerican Airlines

Wed 15/105:15 p.m.LHR - YYZ

Nonstop7h 55mAmerican Airlines

Deal found 29/7C$ 895

Thu 7/810:25 p.m.YUL - LHR

Nonstop6h 35mAir Canada

Sun 24/86:50 a.m.LHR - YUL

1 stop9h 40mAir Canada

Deal found 29/7C$ 898

Sat 9/86:25 p.m.YTZ - LHR

1 stop10h 35mAir Canada

Tue 26/86:50 a.m.LHR - YTZ

2 stops14h 56mAir Canada

Deal found 29/7C$ 887

One-way flights from Ontario to London
Search for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 30 July 2025.

Wed 15/1010:45 p.m.YUL - LHR

1 stop11h 50mTAP AIR PORTUGAL

Deal found 29/7C$ 364

Wed 24/911:00 p.m.YUL - LGW

1 stop14h 55mMultiple Airlines

Deal found 29/7C$ 366

Mon 13/1010:10 p.m.YYZ - LCY

1 stop15h 10mMultiple Airlines

Deal found 28/7C$ 367

Sat 27/911:00 a.m.YTZ - LGW

1 stop14h 20mMultiple Airlines

Deal found 29/7C$ 367

Wed 24/95:40 p.m.YYZ - LHR

1 stop11h 40mTAP AIR PORTUGAL

Deal found 30/7C$ 367

Mon 20/102:55 p.m.YYZ - LTN

2 stops25h 30mMultiple Airlines

Deal found 29/7C$ 367

Thu 11/911:15 p.m.YYZ - LGW

1 stop29h 35mAir Transat

Deal found 29/7C$ 367

Tue 19/89:15 p.m.YYZ - STN

2 stops20h 40mMultiple Airlines

Deal found 29/7C$ 367

Sun 14/99:00 p.m.YTZ - LGW

1 stop31h 50mPorter Airlines

Deal found 28/7C$ 368

Sat 11/1010:15 p.m.YYZ - LHR

1 stop19h 10mMultiple Airlines

Deal found 28/7C$ 368

Mon 15/910:05 p.m.YUL - LGW

Nonstop6h 45mPorter Airlines

Deal found 30/7C$ 368

Wed 3/97:00 a.m.YYZ - LGW

2 stops18h 20mMultiple Airlines

Deal found 30/7C$ 368

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 8/9

4:00 p.m.-6:30 a.m.

1 stop9h 30m

London Heathrow

Sun 14/9

8:30 a.m.-11:25 a.m.

Nonstop7h 55m

C$ 735

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Fri 31/10

10:35 p.m.-9:45 a.m.

Nonstop7h 10m

London Gatwick

Tue 11/11

11:40 a.m.-3:00 p.m.

Nonstop8h 20m

C$ 735

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Fri 26/9

9:00 p.m.-9:50 a.m.

1 stop31h 50m

London Gatwick

Sun 5/10

11:35 a.m.-8:10 p.m.

1 stop13h 35m

C$ 737

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 1/12

7:45 p.m.-10:50 a.m.

1 stop10h 05m

London Heathrow

Thu 11/12

12:15 p.m.-6:15 p.m.

1 stop11h 00m

C$ 738

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 25/8

10:10 p.m.-8:55 p.m.

1 stop17h 45m

London Gatwick

Wed 17/9

9:40 a.m.-12:45 p.m.

Nonstop8h 05m

C$ 739

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Thu 18/9

11:55 p.m.-7:30 p.m.

1 stop14h 35m

London Stansted

Fri 26/9

6:40 a.m.-2:40 p.m.

1 stop13h 00m

C$ 739

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 12/9

10:25 a.m.-6:30 a.m.

1 stop15h 05m

London Heathrow

Tue 16/9

9:30 a.m.-5:45 p.m.

1 stop13h 15m

C$ 741

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 15/10

10:30 p.m.-10:40 a.m.

Nonstop7h 10m

London Heathrow

Wed 22/10

9:55 a.m.-7:55 p.m.

1 stop15h 00m

C$ 742

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 7/9

10:00 a.m.-7:55 a.m.

1 stop16h 55m

London Gatwick

Tue 23/9

11:35 a.m.-2:15 p.m.

Nonstop7h 40m

C$ 742

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 6/9

9:55 p.m.-9:35 a.m.

Nonstop6h 40m

London Heathrow

Tue 23/9

6:00 a.m.-6:20 p.m.

2 stops17h 20m

C$ 742

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 58 results

...

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London from Ontario with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London

What is the cheapest month to book a flight from Region of Ontario to London?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 857). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to LON?

When flying from Region of Ontario to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London

The most flights from CAON to LON are scheduled on a Tuesday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

How much does it cost to fly round-trip from Region of Ontario to London?

Reviews of airlines servicing London

Read through reviews of airlines operating flights from Ontario to London, such as Delta,Porter Airlines, andKLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,980 reviews

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

8.0

Very good

318 reviews

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,383 reviews

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.7

Good

424 reviews

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

823 reviews

Delta

8.0

Very good

7,980 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to London one-way?
For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as C$ 364. Users have also found prices from C$ 367 and C$ 368 on Air Transat and Porter Airlines, respectively.
What are the most popular routes from Region of Ontario to London?
The most popular flight routes from Region of Ontario to London are Toronto Pearson Intl - London Heathrow, Toronto Pearson Intl - London Gatwick and Montreal Pierre Elliott Trudeau Intl - London Heathrow.
What are the most reliable airlines from Region of Ontario to London?
Consider Croatia Airlines (88%), KLM (87%) or Air France (87%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to London.
What are the cheapest flights from Region of Ontario to London?
On average you can expect to pay C$ 2,230 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 415 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 713.
Can I find deals for flights from Ontario to London that include hotel bookings?
Yes. In addition to deals on Ontario to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.
Can I find deals for business class flights from Ontario to London?
Yes. Cheapflights offers flight deals from Ontario to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Region of Ontario to London?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 857). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Brentford

Sutton

Hounslow

Slough

Marlow

Milton Keynes

Romford

Watford

Bromley

Luton

Bedford

Southall

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to London

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 219	AverageC$ 583	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
PLAY	CheapestC$ 482	AverageC$ 585	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
WestJet Encore	CheapestC$ 550	AverageC$ 702	FlexibilityNo cancel fee	On-timeN/A	Search WestJet Encore flights
Air Transat	CheapestC$ 577	AverageC$ 934	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
TAP AIR PORTUGAL	CheapestC$ 598	AverageC$ 681	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	CheapestC$ 621	AverageC$ 839	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Porter Airlines	CheapestC$ 628	AverageC$ 881	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Aer Lingus	CheapestC$ 677	AverageC$ 816	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Delta	CheapestC$ 698	AverageC$ 866	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 705	AverageC$ 1,044	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to London?

Cheapflights helps you search for flights from Ontario to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Cheapflights simply makes it quick and affordable to book flights from Ontario to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to London with no change fees?

Need flexible booking options for your flight to London from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

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Cheap flights from Ontario to London from C$ 364

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 30 July 2025.

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One-way from

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Find flight deals from Ontario to London

Cheapest flights from Ontario to LondonExplore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.

Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.

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Use the filters below to find and compare flights from Ontario to London that are best for you.

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London

What is the cheapest month to book a flight from Region of Ontario to London?

What is the cheapest time of day to fly from ON to LON?

Find hourly flight availability from Ontario to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 July 2025.

Weekly flight availability from Region of Ontario to London

Explore weekly flight availability from Ontario to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 30 July 2025.

How much does it cost to fly round-trip from Region of Ontario to London?

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 30 July 2025.

Read through reviews of airlines operating flights from Ontario to London, such as Delta,Porter Airlines, andKLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Region of Ontario to London one-way?

What are the most popular routes from Region of Ontario to London?

What are the most reliable airlines from Region of Ontario to London?

What are the cheapest flights from Region of Ontario to London?

Can I find deals for flights from Ontario to London that include hotel bookings?

How can I find direct flights from Ontario to London?

Can I find deals for business class flights from Ontario to London?

What is the cheapest month to book a flight from Region of Ontario to London?

Travelling to a place near London?

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Alternative routes for Ontario to London

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Top 10 airlines flying from Ontario to London

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How does Cheapflights help users find flights from Ontario to London?

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Can Cheapflights find flights from Ontario to London with no change fees?

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

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Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.