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

9 dates in June 2027, from $ 455. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
27 Jun 2027 Alaska Airlines
1 Jun 2027 Alaska Airlines
15 Jun 2027 Alaska Airlines
20 Jun 2027 Alaska Airlines
6 Jun 2027 Alaska Airlines
5 Jun 2027 Alaska Airlines
19 Jun 2027 Alaska Airlines
4 Jun 2027 Alaska Airlines
11 Jun 2027 Alaska Airlines
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Deals for return flights from Ontario to London in June.

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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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