AirHint found the following cheapest one-way flights from Ontario (ONT) to London (LHR) in December 2026 (see full year).
One-Way flights
| 08 Dec | British Airways | ||
| 30 Dec | Iberia | ||
| 03 Dec | Virgin Atlantic | ||
| 27 Dec | British Airways | ||
| 28 Dec | British Airways | ||
| 25 Dec | British Airways | ||
| 19 Dec | British Airways |
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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