Cheapest one-way flights from Ontario to London in December from 211€

AirHint found the following cheapest one-way flights from Ontario (ONT) to London (LGW) in December 2025 (see full year).

One-Way flights

04 Dec Frontier Airlines
01 Dec British Airways
09 Dec British Airways
06 Dec British Airways
15 Dec British Airways
07 Dec British Airways
23 Dec Frontier Airlines
16 Dec British Airways
14 Dec British Airways
22 Dec Frontier Airlines

Also check the deals for return flights from Ontario to London in December.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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