AirHint found the following cheapest return flights from Ontario (ONT) to Keflavik (KEF) in July 2026 (see full year).

Return flights

13 Jul - 21 Jul	Air Canada
16 Jul - 20 Jul	Alaska Airlines
15 Jul - 23 Jul	Alaska Airlines
08 Jul - 13 Jul	Alaska Airlines
06 Jul - 17 Jul	British Airways
03 Jul - 12 Jul	Alaska Airlines

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

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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Cheapest return flights from Ontario to Keflavik in July from $747

Return flights