Find cheap flights from Ontario to the United Kingdom from £334
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to the United Kingdom departing on 28/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
Return
1 adult
Economy
0 bags
Thu 23/5
Thu 30/5
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In the last 7 days, travellers have searched 44,632,927 times on KAYAK, and here's why:
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Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (13% more expensive on average)
Flight from Ontario to London Heathrow Airport
FAQs - booking United Kingdom flights
How does KAYAK find such low prices on flights from Ontario to the United Kingdom?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to the United Kingdom.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to the United Kingdom?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to the United Kingdom from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to the United Kingdom?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to the United Kingdom with an airline and back to Ontario with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to the United Kingdom?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to the United Kingdom from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
See more FAQs
Top tips for finding a cheap flight from Ontario to the United Kingdom
Morning departure is around 5% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days
Book cheap flights from Ontario to the United Kingdom
Cheapest flights to the United Kingdom from Ontario found in 2024
Recent return flight deals
25/9Wed
1 stopBritish Airways
13h 53mONT-LHR
3/10Thu
1 stopBritish Airways
16h 53mLHR-ONT
£482
4/9Wed
1 stopIberia
13h 53mONT-LHR
11/9Wed
2 stopsIberia
19h 56mLHR-ONT
£498
4/9Wed
2 stopsAmerican Airlines
21h 45mONT-ABZ
11/9Wed
2 stopsAmerican Airlines
18h 25mABZ-ONT
£502
5/5Sun
1 stopDelta
22h 15mONT-LHR
14/5Tue
2 stopsDelta
24h 23mLHR-ONT
£505
5/5Sun
1 stopDelta
15h 15mONT-LHR
14/5Tue
2 stopsDelta
19h 47mLHR-ONT
£506
21/8Wed
2 stopsAmerican Airlines
15h 35mONT-LHR
13/9Fri
2 stopsAmerican Airlines
16h 11mLHR-ONT
£513
22/9Sun
1 stopUnited Airlines
12h 05mONT-LHR
10/10Thu
1 stopUnited Airlines
15h 41mLHR-ONT
£515
24/9Tue
1 stopUnited Airlines
12h 05mONT-LHR
2/10Wed
1 stopUnited Airlines
14h 12mLHR-ONT
£515
25/9Wed
2 stops
17h 20mONT-LHR
3/10Thu
2 stops
18h 51mLHR-ONT
£523
6/5Mon
2 stops
17h 15mONT-LHR
13/5Mon
2 stops
22h 34mLHR-ONT
£573
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Recent one-way flight deals
28/4Sun
1 stopIberia
14h 42mONT-LHR
£334
26/6Wed
2 stops
25h 11mONT-LGW
£335
5/10Sat
1 stopAmerican Airlines
24h 30mONT-LHR
£344
28/4Sun
2 stopsAmerican Airlines
24h 15mONT-LGW
£344
30/4Tue
2 stopsAmerican Airlines
16h 20mONT-LHR
£345
1/10Tue
2 stopsUnited Airlines
16h 22mONT-LHR
£361
30/7Tue
1 stopUnited Airlines
14h 45mONT-LHR
£367
6/5Mon
1 stopAlaska Airlines
16h 25mONT-LHR
£368
14/7Sun
1 stopBritish Airways
13h 12mONT-LHR
£372
31/8Sat
1 stopBritish Airways
34h 20mONT-LHR
£400
Search by stops
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Last minute flights from Ontario to the United Kingdom