Cheapest return flights from Ontario to Keflavik in April from $652

Best time to book flights for Ontario (ONT) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Ontario (ONT) to Keflavik (KEF) in April 2025 (see full year).

Return flights

20 Apr - 27 Apr Frontier Airlines
21 Apr - 01 May Frontier Airlines
21 Apr - 28 Apr Frontier Airlines
21 Apr - 27 Apr Frontier Airlines
11 Apr - 17 Apr Frontier Airlines
24 Apr - 03 May Alaska Airlines
23 Apr - 03 May Alaska Airlines
13 Apr - 20 Apr Alaska Airlines
06 Apr - 13 Apr Alaska Airlines
05 Apr - 12 Apr Alaska Airlines

Also check the deals for one-way flights from Ontario to Keflavik in April.

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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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