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Cheapest one-way flights from Ontario (ONT) to London (LHR), October

10 dates in October, from $ 329. Book in one tap, or check whether to buy now or wait.

One-way Return

Dates, airline, and price
Dates	Airline	Price
19 Oct	jetBlue
14 Oct	jetBlue
15 Oct	jetBlue

27 Oct	Alaska Airlines
21 Oct	Frontier Airlines
24 Oct	Frontier Airlines
26 Oct	Frontier Airlines
20 Oct	Alaska Airlines
23 Oct	Alaska Airlines
29 Oct	British Airways

Cheapest deals for the full year

Deals for return flights from Ontario to London in October.

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Updated Oct 14, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Ontario (ONT) to London (LHR), October

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