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Cheap flights from Ontario to the United Kingdom from C$ 346

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
11 Apr — 18 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to United Kingdom

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to United Kingdom
Explore the most affordable flight options available from Ontario to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 March 2026.

Tue 7/48:45 p.m.
YYZ
-
LHR
1 stop10h 10m
Icelandair
Mon 13/49:25 p.m.
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 8/3C$ 701
Thu 23/411:10 p.m.
YYZ
-
LGW
1 stop10h 30m
Icelandair
Thu 30/41:00 p.m.
LGW
-
YYZ
1 stop14h 05m
Icelandair
Deal found 9/3C$ 701
Mon 6/411:10 p.m.
YYZ
-
LHR
1 stop31h 45m
Icelandair
Thu 30/41:05 p.m.
LHR
-
YYZ
1 stop14h 00m
Icelandair
Deal found 8/3C$ 702
Thu 28/58:45 p.m.
YYZ
-
LTN
2 stops21h 40m
Multiple Airlines
Tue 2/69:40 a.m.
LTN
-
YYZ
2 stops17h 25m
Multiple Airlines
Deal found 7/3C$ 702
Thu 16/48:45 p.m.
YYZ
-
LGW
1 stop12h 55m
Icelandair
Mon 20/43:40 p.m.
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 7/3C$ 702
Wed 20/510:05 p.m.
YYZ
-
STN
1 stop17h 25m
Multiple Airlines
Thu 28/56:30 a.m.
STN
-
YYZ
1 stop11h 50m
Multiple Airlines
Deal found 7/3C$ 702
Tue 7/48:45 p.m.
YYZ
-
LHR
1 stop10h 10m
Icelandair
Mon 27/49:25 p.m.
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 10/3C$ 703
Wed 15/411:10 p.m.
YYZ
-
LGW
1 stop10h 30m
Icelandair
Mon 20/43:40 p.m.
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 8/3C$ 703
Tue 19/510:05 p.m.
YYZ
-
STN
1 stop10h 20m
Multiple Airlines
Tue 9/68:30 a.m.
STN
-
YYZ
1 stop11h 25m
Multiple Airlines
Deal found 10/3C$ 703
Fri 17/411:10 p.m.
YYZ
-
LHR
1 stop16h 10m
Icelandair
Mon 27/49:25 p.m.
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 7/3C$ 705
Tue 14/48:45 p.m.
YYZ
-
LGW
1 stop12h 55m
Icelandair
Sat 18/43:40 p.m.
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 9/3C$ 705
Tue 7/48:45 p.m.
YYZ
-
STN
2 stops20h 35m
Multiple Airlines
Mon 13/46:30 a.m.
STN
-
YYZ
2 stops20h 35m
Multiple Airlines
Deal found 8/3C$ 705

Find flight deals from Ontario to United Kingdom

Keep the following information in mind while searching for Ontario to United Kingdom flight deals. Data was last updated 12 March 2026.

Round-trip from

C$ 701

One-way from

C$ 346

Popular in

December

Cheapest in

May

Average price

C$ 826

Good round-trip deal

C$ 223 or less

Good one-way deal

C$ 66 or less
Icelandair
  • Icelandair
  • 7/4-13/4
  • 2 total stops
  • 36h 55m total
  • Ontario to United Kingdom
Search Deals
WestJet
  • WestJet
  • 25/5
  • 1 total stop
  • 19h 30m total
  • Ontario to United Kingdom
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Ontario to United Kingdom.
Search Deals
Price to beat on a one-way flight from Ontario to United Kingdom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 March 2026.
Use the filters below to find and compare flights from Ontario to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 19/5

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

Nonstop7h 00m

London Gatwick

Wed 27/5

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

Nonstop8h 00m

C$ 768

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 5/4

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

Nonstop7h 10m

London Gatwick

Fri 17/4

12:40 p.m.-4:00 p.m.

Nonstop8h 20m

C$ 783

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Mon 18/5

7:15 p.m.-9:25 p.m.

1 stop21h 10m

London Stansted

Mon 1/6

10:25 p.m.-11:00 a.m.

1 stop17h 35m

C$ 788

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 18/5

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

Nonstop7h 00m

London Gatwick

Wed 27/5

11:35 a.m.-6:38 p.m.

1 stop12h 03m

C$ 793

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 2/4

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

Nonstop7h 10m

London Gatwick

Tue 28/4

12:40 p.m.-4:00 p.m.

Nonstop8h 20m

C$ 813

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 5/5

5:00 p.m.-9:50 a.m.

1 stop11h 50m

London Gatwick

Fri 15/5

11:35 a.m.-8:15 p.m.

1 stop13h 40m

C$ 827

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Thu 21/5

9:30 p.m.-12:15 a.m.

1 stop21h 45m

London Luton

Wed 3/6

6:10 p.m.-2:40 p.m.

1 stop25h 30m

C$ 830

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 17/5

7:15 p.m.-9:55 p.m.

1 stop21h 40m

London Stansted

Sun 24/5

10:10 p.m.-11:00 a.m.

1 stop17h 50m

C$ 835

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 15/6

10:45 p.m.-3:35 p.m.

1 stop11h 50m

London Gatwick

Mon 22/6

12:05 p.m.-9:10 p.m.

2 stops14h 05m

C$ 861

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

8:25 p.m.-9:05 p.m.

1 stop19h 40m

London Gatwick

Sat 9/5

4:30 p.m.-11:35 a.m.

1 stop24h 05m

C$ 870

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom 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 the United Kingdom

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

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to United Kingdom (average of C$ 60). Flying from Region of Ontario to United Kingdom in March is currently the most expensive (average of C$ 668). 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 GB?

Find hourly flight availability from Ontario to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 March 2026.

When flying from Region of Ontario to United Kingdom, 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 United Kingdom

Explore weekly flight availability from Ontario to United Kingdom. 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 12 March 2026.

The most flights from CAON to GB0 are scheduled on a Wednesday (35 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 on average).

Related info for your journey

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

  • How long is the flight from Region of Ontario to United Kingdom?

    There are many flights that can get you from Region of Ontario to United Kingdom in 7h. Fly via TAP AIR PORTUGAL, Air Transat, or Porter Airlines to get the fastest option. The distance between Region of Ontario and United Kingdom is about 5734 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Region of Ontario to United Kingdom one-way?

    One-way options have recently been found by users for as low as C$ 60 on WestJet. Other airlines that offer cheap prices include Air Transat from C$ 303 and TAP AIR PORTUGAL from C$ 314 one-way.

  • Can I find deals for flights from Ontario to United Kingdom that include hotel bookings?

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

  • How can I find direct flights from Ontario to United Kingdom?

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

  • Can I find deals for business class flights from Ontario to United Kingdom?

    Yes. Cheapflights offers flight deals from Ontario to United Kingdom 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 United Kingdom?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to United Kingdom (average of C$ 60). Flying from Region of Ontario to United Kingdom in March is currently the most expensive (average of C$ 668). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
Pierre Elliott Trudeau Intl to Charles de Gaulle flights
Pearson Intl to Heathrow flights
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Pearson Intl to Gatwick flights
Pearson Intl to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Lisbon flights
Pearson Intl to Charles de Gaulle flights
Pearson Intl to Lisbon flights
Pierre Elliott Trudeau Intl to Leonardo da Vinci/Fiumicino flights
Pearson Intl to Athens flights
Pierre Elliott Trudeau Intl to Athens flights
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Pearson Intl to Stansted flights
Vancouver Intl to Charles de Gaulle flights
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Pearson Intl to Barcelona-El Prat flights
Toronto Island to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to Istanbul flights
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Pearson Intl to Luton flights
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Pearson Intl to Amsterdam flights
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Pearson Intl to Frankfurt flights
Vancouver Intl to Frankfurt flights
Vancouver Intl to Amsterdam flights
Québec City to Charles de Gaulle flights
Pearson Intl to Orly flights
Calgary to Heathrow flights
Vancouver Intl to London City flights
Pearson Intl to Madrid flights
Toronto Island to Lisbon flights
Vancouver Intl to Leonardo da Vinci/Fiumicino flights
Pierre Elliott Trudeau Intl to Gatwick flights
Vancouver Intl to Istanbul flights
Vancouver Intl to Dublin flights
Pierre Elliott Trudeau Intl to Malpensa flights
Toronto Island to Charles de Gaulle flights
Pierre Elliott Trudeau Intl to Bruxelles-National flights
Pearson Intl to Edinburgh flights
Toronto Island to Gatwick flights
Pierre Elliott Trudeau Intl to Amsterdam flights
Toronto Island to Athens flights
Pierre Elliott Trudeau Intl to Madrid flights
Pierre Elliott Trudeau Intl to Vicenza flights

Top 10 airlines flying from Ontario to United Kingdom

Discover the top 10 airlines that operate flights from Ontario to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 216AverageC$ 784FlexibilityNo cancel feeOn-time60%
Search WestJet flights
LufthansaCheapestC$ 421AverageC$ 1,059FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
WestJet EncoreCheapestC$ 542AverageC$ 691FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 568AverageC$ 968FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 590AverageC$ 814FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapestC$ 600AverageC$ 1,110FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 610AverageC$ 998FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 636AverageC$ 842FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
American AirlinesCheapestC$ 696AverageC$ 1,045FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapestC$ 699AverageC$ 1,057FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to United Kingdom?

Deals for Ontario to United Kingdom flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to United Kingdom from Ontario.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to United Kingdom, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Ontario to United Kingdom flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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