Cheapest return flights from Ontario to London in May from 878€

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

Return flights

12 May - 06 Jun British Airways
06 May - 30 May British Airways
18 May - 27 May British Airways
18 May - 01 Jun British Airways
15 May - 06 Jun British Airways
26 May - 02 Jun British Airways
16 May - 06 Jun British Airways
05 May - 14 May Iberia
13 May - 06 Jun British Airways
05 May - 30 May British Airways
14 May - 31 May British Airways
01 May - 23 May British Airways
22 May - 30 May British Airways
19 May - 13 Jun British Airways
20 May - 10 Jun British Airways
22 May - 13 Jun British Airways

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

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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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