AirHint found the following cheapest return flights from Ontario (ONT) to London (LGW) in January 2026 (see full year).

Return flights

13 Jan - 07 Feb	Iberia
10 Jan - 04 Feb	British Airways
11 Jan - 31 Jan	British Airways
08 Jan - 31 Jan	British Airways
17 Jan - 07 Feb	British Airways
10 Jan - 21 Jan	British Airways
31 Jan - 14 Feb	British Airways
15 Jan - 07 Feb	British Airways
12 Jan - 21 Jan	British Airways
19 Jan - 26 Jan	British Airways
07 Jan - 31 Jan	British Airways
17 Jan - 25 Jan	British Airways
14 Jan - 07 Feb	British Airways
07 Jan - 18 Jan	British Airways
01 Jan - 19 Jan	British Airways
01 Jan - 24 Jan	British Airways

Also check the deals for one-way flights from Ontario to London in January.

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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Cheapest return flights from Ontario to London in January from 713€

Return flights