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

For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 353. Users have also found prices from C$ 361 and C$ 374 on Porter Airlines and Air Transat, 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 Toronto Pearson Intl - London City.

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

On average you can expect to pay C$ 1,926 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 489 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 347.

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

Consider Ethiopian Air (88%), Egyptair (78%) or American Airlines (76%) 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 50 days in advance to save up to 21% 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 50 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$ 854, or C$ 1,111 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$ 855. Cheapflights users have found deals in the month of February for as cheap as C$ 526. 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$ 340+ Flights from Ontario to London - Compare & Save Big

Cheap flight deals from Ontario to London

Round-trip from	C$ 669
One-way from	C$ 340
Popular in	December
Cheapest in	February
Average price	C$ 771
Good round-trip deal	C$ 683 or less
Good one-way deal	C$ 438 or less

Air Transat
24/5-30/5
Nonstop
15h 00m total
Ontario to London

Search Deals

16/6
1 total stop
18h 35m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (C$ 33 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 2025.

Wed 4/611:00 p.m.YYZ - LHR

1 stop16h 20mIcelandair

Mon 9/69:25 p.m.LHR - YYZ

1 stop29h 30mIcelandair

Deal found 29/4C$ 671

Tue 3/66:20 p.m.YYZ - LHR

Nonstop7h 15mAir Canada

Wed 11/66:00 a.m.LHR - YYZ

1 stop12h 50mAir Canada

Deal found 28/4C$ 673

Sat 7/64:25 p.m.YYZ - LGW

1 stop12h 25mPorter Airlines

Sat 14/611:35 a.m.LGW - YYZ

1 stop12h 33mPorter Airlines

Deal found 29/4C$ 673

Sun 11/56:20 p.m.YYZ - LGW

1 stop10h 05mMultiple Airlines

Wed 28/510:00 p.m.LGW - YYZ

2 stops31h 25mMultiple Airlines

Deal found 29/4C$ 674

Tue 17/62:30 p.m.YYZ - STN

2 stops25h 45mMultiple Airlines

Tue 24/64:35 p.m.STN - YYZ

2 stops29h 16mMultiple Airlines

Deal found 29/4C$ 674

Fri 6/62:30 p.m.YYZ - LTN

2 stops20h 15mMultiple Airlines

Mon 9/69:55 p.m.LTN - YYZ

1 stop21h 15mMultiple Airlines

Deal found 29/4C$ 677

Tue 27/56:55 p.m.YTZ - LGW

1 stop9h 55mPorter Airlines

Tue 3/611:35 a.m.LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 29/4C$ 678

Mon 2/611:00 p.m.YYZ - LGW

1 stop10h 35mIcelandair

Sat 7/63:40 p.m.LGW - YYZ

1 stop11h 15mIcelandair

Deal found 29/4C$ 678

Mon 13/1011:00 p.m.YYZ - LHR

1 stop32h 45mTAP AIR PORTUGAL

Mon 20/108:00 a.m.LHR - YYZ

1 stop34h 55mTAP AIR PORTUGAL

Deal found 29/4C$ 680

Fri 2/511:15 p.m.YYZ - LGW

1 stop29h 35mAir Transat

Fri 9/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 29/4C$ 680

Mon 19/59:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Wed 28/511:35 a.m.LGW - YTZ

1 stop11h 35mAir Transat

Deal found 29/4C$ 691

Thu 8/54:20 p.m.YTZ - LHR

1 stop9h 10mAir Canada

Wed 4/69:30 a.m.LHR - YTZ

1 stop10h 20mAir Canada

Deal found 29/4C$ 709

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 April 2025.

Sat 24/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Fri 30/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 28/4C$ 669

Mon 5/511:20 p.m.YYZ - LHR

1 stop26h 10mAir Canada

Fri 9/58:40 a.m.LHR - YYZ

1 stop12h 45mAir Canada

Deal found 28/4C$ 671

Sat 7/64:25 p.m.YYZ - LGW

1 stop12h 25mPorter Airlines

Sat 14/611:35 a.m.LGW - YYZ

1 stop12h 33mPorter Airlines

Deal found 29/4C$ 673

Sun 11/56:20 p.m.YYZ - LGW

1 stop10h 05mMultiple Airlines

Wed 28/510:00 p.m.LGW - YYZ

2 stops31h 25mMultiple Airlines

Deal found 29/4C$ 674

Mon 2/611:00 p.m.YYZ - LGW

1 stop10h 35mIcelandair

Thu 12/63:40 p.m.LGW - YYZ

1 stop11h 15mIcelandair

Deal found 29/4C$ 678

Mon 16/610:45 p.m.YUL - LHR

1 stop18h 15mTAP AIR PORTUGAL

Tue 24/67:50 p.m.LHR - YUL

1 stop29h 55mTAP AIR PORTUGAL

Deal found 28/4C$ 725

Wed 4/66:05 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Fri 13/61:20 p.m.LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 28/4C$ 732

Tue 13/511:15 p.m.YYZ - LHR

1 stop28h 20mLufthansa

Wed 4/65:40 p.m.LHR - YYZ

1 stop30h 39mLufthansa

Deal found 28/4C$ 742

Fri 23/56:05 p.m.YYZ - LHR

Nonstop7h 10mAmerican Airlines

Tue 27/59:15 a.m.LHR - YYZ

2 stops13h 05mAmerican Airlines

Deal found 28/4C$ 765

Sun 11/56:20 p.m.YYZ - LGW

1 stop10h 05mWestJet

Fri 16/510:45 a.m.LGW - YYZ

1 stop11h 25mWestJet

Deal found 29/4C$ 768

Wed 7/58:15 p.m.YYZ - LGW

1 stop16h 40mSWISS

Sat 10/56:40 p.m.LGW - YYZ

1 stop26h 45mSWISS

Deal found 29/4C$ 794

Mon 5/53:00 p.m.YYZ - LHR

1 stop10h 45mUnited Airlines

Sun 11/58:30 a.m.LHR - YYZ

1 stop13h 12mUnited Airlines

Deal found 29/4C$ 819

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 April 2025.

Fri 23/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Sun 1/69:40 a.m.LGW - YYZ

Nonstop8h 05mAir Transat

Deal found 29/4C$ 680

Tue 27/56:20 p.m.YYZ - LHR

Nonstop7h 15mAir Canada

Tue 3/68:30 a.m.LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 29/4C$ 718

Sat 24/510:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Sun 8/611:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 28/4C$ 721

Mon 9/610:25 p.m.YUL - LHR

Nonstop6h 35mAir Canada

Tue 17/69:30 a.m.LHR - YUL

Nonstop7h 10mAir Canada

Deal found 29/4C$ 729

Tue 3/610:45 p.m.YYZ - LGW

Nonstop7h 00mPorter Airlines

Fri 13/612:40 p.m.LGW - YYZ

Nonstop8h 00mPorter Airlines

Deal found 29/4C$ 743

Fri 23/56:20 p.m.YYZ - LHR

Nonstop7h 15mMultiple Airlines

Tue 3/65:40 p.m.LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 29/4C$ 745

Wed 4/66:20 p.m.YYZ - LHR

Nonstop7h 15mLufthansa

Tue 10/68:30 a.m.LHR - YYZ

Nonstop7h 50mLufthansa

Deal found 29/4C$ 746

Sat 24/510:25 p.m.YUL - LHR

Nonstop6h 35mLufthansa

Sat 7/69:30 a.m.LHR - YUL

Nonstop7h 10mLufthansa

Deal found 29/4C$ 753

Thu 12/610:05 p.m.YYZ - LHR

Nonstop7h 15mBritish Airways

Tue 17/65:15 p.m.LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 28/4C$ 757

Sat 14/610:05 p.m.YUL - LGW

Nonstop6h 45mPorter Airlines

Sat 21/611:35 a.m.LGW - YUL

Nonstop7h 40mPorter Airlines

Deal found 29/4C$ 782

Thu 29/510:05 p.m.YUL - LHR

Nonstop6h 40mBritish Airways

Mon 2/66:05 p.m.LHR - YUL

Nonstop7h 10mBritish Airways

Deal found 28/4C$ 790

Thu 29/510:05 p.m.YUL - LHR

Nonstop6h 40mAmerican Airlines

Thu 12/66:05 p.m.LHR - YUL

Nonstop7h 10mAmerican Airlines

Deal found 28/4C$ 811

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

Fri 2/511:15 p.m.YYZ - LGW

1 stop29h 35mAir Transat

Fri 9/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 29/4C$ 680

Sun 4/53:00 p.m.YYZ - LHR

1 stop10h 30mMultiple Airlines

Sat 10/58:30 a.m.LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 29/4C$ 728

Mon 5/511:15 p.m.YYZ - LGW

1 stop29h 35mAir Transat

Mon 12/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 29/4C$ 680

Mon 5/55:40 p.m.YUL - LGW

1 stop12h 05mPorter Airlines

Mon 12/512:40 p.m.LGW - YUL

1 stop11h 27mPorter Airlines

Deal found 28/4C$ 723

Tue 6/512:30 p.m.YTZ - LGW

1 stop16h 20mPorter Airlines

Fri 9/511:35 a.m.LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 29/4C$ 692

Tue 6/510:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Wed 21/511:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 29/4C$ 741

Wed 7/510:25 p.m.YUL - LHR

Nonstop6h 35mLufthansa

Mon 12/59:30 a.m.LHR - YUL

Nonstop7h 10mLufthansa

Deal found 28/4C$ 753

Thu 8/52:00 p.m.YYZ - LHR

1 stop11h 30mAir Canada

Wed 4/66:00 a.m.LHR - YYZ

1 stop12h 50mAir Canada

Deal found 29/4C$ 674

Thu 8/54:20 p.m.YTZ - LHR

1 stop9h 10mAir Canada

Wed 4/69:30 a.m.LHR - YTZ

1 stop10h 20mAir Canada

Deal found 29/4C$ 709

Fri 9/511:15 p.m.YYZ - LGW

1 stop29h 35mPorter Airlines

Wed 21/511:35 a.m.LGW - YYZ

1 stop28h 53mPorter Airlines

Deal found 29/4C$ 696

Fri 9/59:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Wed 21/511:35 a.m.LGW - YTZ

1 stop15h 45mAir Transat

Deal found 29/4C$ 700

Fri 9/511:15 p.m.YYZ - LGW

1 stop29h 35mMultiple Airlines

Tue 13/59:35 p.m.LGW - YYZ

1 stop21h 35mMultiple Airlines

Deal found 29/4C$ 752

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 April 2025.

Mon 16/610:15 p.m.YYZ - LHR

1 stop18h 35mMultiple Airlines

Deal found 28/4C$ 340

Tue 10/610:15 p.m.YYZ - LGW

2 stops18h 00mMultiple Airlines

Deal found 29/4C$ 350

Sat 7/610:15 p.m.YYZ - LTN

2 stops28h 55mMultiple Airlines

Deal found 29/4C$ 352

Sat 24/55:35 p.m.YYZ - LGW

1 stop10h 50mWestJet

Deal found 28/4C$ 353

Sun 29/610:15 p.m.YYZ - STN

2 stops20h 30mMultiple Airlines

Deal found 29/4C$ 354

Fri 6/62:30 p.m.YYZ - LHR

2 stops18h 15mWestJet

Deal found 29/4C$ 360

Mon 26/54:40 p.m.YTZ - LGW

1 stop12h 10mPorter Airlines

Deal found 29/4C$ 361

Mon 26/56:35 p.m.YYZ - LGW

1 stop10h 15mPorter Airlines

Deal found 29/4C$ 370

Mon 30/610:15 p.m.YYZ - LCY

1 stop16h 05mMultiple Airlines

Deal found 29/4C$ 372

Fri 6/610:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Deal found 29/4C$ 374

Tue 10/612:35 p.m.YTZ - LGW

3 stops15h 50mMultiple Airlines

Deal found 29/4C$ 378

Fri 2/59:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Deal found 29/4C$ 412

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 4/6

11:00 p.m.-8:20 p.m.

1 stop16h 20m

London Heathrow

Mon 9/6

9:25 p.m.-9:55 p.m.

1 stop29h 30m

C$ 671

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 3/6

6:20 p.m.-6:35 a.m.

Nonstop7h 15m

London Heathrow

Wed 11/6

6:00 a.m.-1:50 p.m.

1 stop12h 50m

C$ 673

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sat 7/6

4:25 p.m.-9:50 a.m.

1 stop12h 25m

London Gatwick

Sat 14/6

11:35 a.m.-7:08 p.m.

1 stop12h 33m

C$ 673

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 11/5

6:20 p.m.-9:25 a.m.

1 stop10h 05m

London Gatwick

Wed 28/5

10:00 p.m.-12:25 a.m.

2 stops31h 25m

C$ 674

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Tue 17/6

2:30 p.m.-9:15 p.m.

2 stops25h 45m

London Stansted

Tue 24/6

4:35 p.m.-4:51 p.m.

2 stops29h 16m

C$ 674

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Fri 6/6

2:30 p.m.-3:45 p.m.

2 stops20h 15m

London Luton

Mon 9/6

9:55 p.m.-2:10 p.m.

1 stop21h 15m

C$ 677

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Thu 22/5

2:45 p.m.-9:50 a.m.

1 stop14h 05m

London Gatwick

Wed 28/5

11:35 a.m.-6:10 p.m.

1 stop11h 35m

C$ 678

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 2/6

11:00 p.m.-2:35 p.m.

1 stop10h 35m

London Gatwick

Sat 7/6

3:40 p.m.-9:55 p.m.

1 stop11h 15m

C$ 678

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sat 24/5

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

Nonstop7h 00m

London Gatwick

Mon 16/6

12:40 p.m.-3:40 p.m.

Nonstop8h 00m

C$ 680

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Mon 19/5

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

1 stop31h 50m

London Gatwick

Wed 28/5

11:35 a.m.-6:10 p.m.

1 stop11h 35m

C$ 691

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 60 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$ 870). 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 Monday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).

Rainfall in London by month

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.

Temperature in London by month

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).

Reviews of airlines servicing London

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,929 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

7,929 reviews

Delta

8.0

Very good

7,929 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

285 reviews

Delta

8.0

Very good

7,929 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

1,334 reviews

Delta

8.0

Very good

7,929 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

7.8

Good

385 reviews

Delta

8.0

Very good

7,929 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.

Azores Airlines

7.6

Good

66 reviews

Delta

8.0

Very good

7,929 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 WestJet. According to our data, you can fly for as low as C$ 353. Users have also found prices from C$ 361 and C$ 374 on Porter Airlines and Air Transat, 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 Toronto Pearson Intl - London City.
What are the most reliable airlines from Region of Ontario to London?
Consider Ethiopian Air (88%), Egyptair (78%) or American Airlines (76%) 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$ 1,926 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 489 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 347.
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$ 870). 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

Hounslow

Sutton

Slough

Milton Keynes

Romford

Watford

Luton

Bromley

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
Finnair	CheapestC$ 487	AverageC$ 1,094	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
PLAY	CheapestC$ 498	AverageC$ 696	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	CheapestC$ 549	AverageC$ 654	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
WestJet Encore	CheapestC$ 552	AverageC$ 704	FlexibilityNo cancel fee	On-timeN/A	Search WestJet Encore flights
Air Transat	CheapestC$ 579	AverageC$ 961	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Icelandair	CheapestC$ 615	AverageC$ 856	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Porter Airlines	CheapestC$ 650	AverageC$ 898	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Aer Lingus	CheapestC$ 675	AverageC$ 849	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Delta	CheapestC$ 701	AverageC$ 866	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 709	AverageC$ 1,107	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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Ontario to London from C$ 340

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 16/6. 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 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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 April 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 April 2025.

Cheapflights Fare Finder

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 April 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 April 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

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 April 2025.

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. 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 Ontario?

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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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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 April 2025.