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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 May , June 2026

27 May - 03 Jun $ 1,666.00
ONT
Ontario
JetBlue Airways
3 STOPS
LCY
London
LCY
London
JetBlue Airways
2 STOPS
ONT
Ontario
Pick dates
28 May - 03 Jun $ 1,706.00
ONT
Ontario
JetBlue Airways
3 STOPS
LCY
London
LCY
London
JetBlue Airways
2 STOPS
ONT
Ontario
Pick dates
27 May - 03 Jun $ 1,729.00
ONT
Ontario
JetBlue Airways
3 STOPS
LCY
London
LCY
London
JetBlue Airways
2 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to London

27 May - 02 Jun $ 1,809.00
ONT
Ontario
JetBlue Airways
3 STOPS
LCY
London
LCY
London
JetBlue Airways
3 STOPS
ONT
Ontario
Pick dates
28 May - 02 Jun $ 1,847.00
ONT
Ontario
JetBlue Airways
3 STOPS
LCY
London
LCY
London
JetBlue Airways
3 STOPS
ONT
Ontario
Pick dates
27 May - 01 Jun $ 2,029.00
ONT
Ontario
Alaska Airlines
3 STOPS
LCY
London
LCY
London
Alaska Airlines
3 STOPS
ONT
Ontario
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One-way flights to London from Ontario

6:30 AM - 11:55 AM
United Airlines
2 Stops
22h 5m
ONT - LCY
$ 894
Kiwi
Pick dates
6:30 AM - 11:55 AM
United Airlines
2 Stops
22h 5m
ONT - LCY
$ 899
Kiwi
Pick dates
6:30 AM - 11:55 AM
United Airlines
2 Stops
22h 5m
ONT - LCY
$ 899
Kiwi
Pick dates

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.