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Cheap flights from Ontario (ONT) to London (LCY)

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How to find the cheapest flight from Ontario (ONT) to London (LCY)

How to find the cheapest flight from Ontario (ONT) to London (LCY)
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How to find the cheapest flight from Ontario (ONT) to London (LCY)
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How to find the cheapest flight from Ontario (ONT) to London (LCY)
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Cheap flights from Ontario to London in January , February 2026

29 Jan - 26 Feb $ 1,199.00
ONT
Ontario
Frontier Airlines
3 STOPS
LCY
London
LCY
London
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
29 Jan - 24 Feb $ 1,219.00
ONT
Ontario
Hawaiian Airlines
3 STOPS
LCY
London
LCY
London
Hawaiian Airlines
3 STOPS
ONT
Ontario
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29 Jan - 26 Feb $ 1,235.00
ONT
Ontario
Frontier Airlines
3 STOPS
LCY
London
LCY
London
Frontier Airlines
2 STOPS
ONT
Ontario
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Last minute flights from Ontario to London

29 Jan - 01 Feb $ 1,297.00
ONT
Ontario
Frontier Airlines
3 STOPS
LCY
London
LCY
London
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
14 Jan - 01 Feb $ 1,310.00
ONT
Ontario
Frontier Airlines
3 STOPS
LCY
London
LCY
London
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
29 Jan - 01 Feb $ 1,334.00
ONT
Ontario
Frontier Airlines
3 STOPS
LCY
London
LCY
London
Frontier Airlines
3 STOPS
ONT
Ontario
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One-way flights to London from Ontario

6:00 AM - 12:10 PM
United Airlines
2 Stops
46h 55m
ONT - LCY
$ 564
Kiwi
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11:04 AM - 4:25 PM
Swiss International Air Lines
3 Stops
22h 1m
ONT - LCY
$ 574
Kiwi
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1:53 PM - 4:25 PM
Swiss International Air Lines
2 Stops
19h 12m
ONT - LCY
$ 712
Kiwi
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How to find the cheapest flight from Ontario (ONT) to London (LCY)

Related info for your journey
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How to find the cheapest flight from Ontario (ONT) to London (LCY)
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How to find the cheapest flight from Ontario (ONT) to London (LCY)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.