AirHint found the following cheapest return flights from Ontario (ONT) to London (LGW) in August 2026 (see full year).
Return flights
| 11 Aug - 05 Sep | British Airways | ||
| 15 Aug - 05 Sep | Alaska Airlines | ||
| 02 Aug - 22 Aug | British Airways | ||
| 09 Aug - 30 Aug | British Airways | ||
| 28 Aug - 31 Aug | British Airways |
Also check the deals for one-way flights from Ontario to London in August.
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