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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 April , May 2026

23 Apr - 14 May $ 1,314.00
ONT
Ontario
Frontier Airlines
2 STOPS
LCY
London
LCY
London
Frontier Airlines
2 STOPS
ONT
Ontario
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23 Apr - 14 May $ 1,322.00
ONT
Ontario
Frontier Airlines
2 STOPS
LCY
London
LCY
London
Frontier Airlines
3 STOPS
ONT
Ontario
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23 Apr - 20 May $ 1,413.00
ONT
Ontario
Frontier Airlines
2 STOPS
LCY
London
LCY
London
Frontier Airlines
2 STOPS
ONT
Ontario
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Last minute flights from Ontario to London

23 Apr - 01 May $ 1,387.00
ONT
Ontario
Alaska Airlines
2 STOPS
LCY
London
LCY
London
Alaska Airlines
3 STOPS
ONT
Ontario
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19 Apr - 01 May $ 1,406.00
ONT
Ontario
Alaska Airlines
2 STOPS
LCY
London
LCY
London
Alaska Airlines
3 STOPS
ONT
Ontario
Pick dates
23 Apr - 01 May $ 1,411.00
ONT
Ontario
WestJet
2 STOPS
LCY
London
LCY
London
WestJet
3 STOPS
ONT
Ontario
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One-way flights to London from Ontario

7:00 AM - 11:55 AM
United Airlines
2 Stops
21h 35m
ONT - LCY
$ 530
Kiwi
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7:00 AM - 11:00 AM
United Airlines
2 Stops
20h 40m
ONT - LCY
$ 751
Kiwi
Pick dates
7:00 AM - 11:00 AM
United Airlines
2 Stops
20h 40m
ONT - LCY
$ 751
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.