Cheapest return flights from Ontario to London in December from 704€

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

Return flights

15 Dec - 19 Jan British Airways
15 Dec - 17 Jan British Airways
15 Dec - 16 Jan British Airways
07 Dec - 18 Dec Frontier Airlines
04 Dec - 10 Dec British Airways
14 Dec - 16 Jan British Airways
31 Dec - 24 Jan Hawaiian Airlines
13 Dec - 02 Jan Frontier Airlines
12 Dec - 17 Jan British Airways
15 Dec - 24 Dec British Airways
06 Dec - 27 Dec British Airways
07 Dec - 27 Dec British Airways
15 Dec - 26 Dec British Airways
11 Dec - 17 Jan British Airways
10 Dec - 17 Jan British Airways
04 Dec - 08 Dec British Airways
30 Dec - 24 Jan British Airways
08 Dec - 15 Dec British Airways
03 Dec - 27 Dec British Airways
01 Dec - 27 Dec British Airways

Also check the deals for one-way 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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