Cheapest return flights from Seattle to Keflavik in June from $416

Best time to book flights for Seattle (SEA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF) in June 2025 (see full year).

Return flights

02 Jun - 10 Jun Air Canada
01 Jun - 11 Jun Air Canada
24 Jun - 29 Jun Air Canada
24 Jun - 07 Jul Air Canada
07 Jun - 14 Jun Air Canada
13 Jun - 19 Jun Air Canada
04 Jun - 11 Jun Air Canada
23 Jun - 29 Jun Air Canada
04 Jun - 09 Jun Delta
11 Jun - 16 Jun Lufthansa
16 Jun - 24 Jun Delta
23 Jun - 04 Jul Delta
25 Jun - 02 Jul United
26 Jun - 04 Jul Delta
25 Jun - 01 Jul Delta
26 Jun - 02 Jul Delta
27 Jun - 05 Jul Air Canada
30 Jun - 08 Jul Icelandair direct
23 Jun - 04 Jul Icelandair direct
27 Jun - 04 Jul Air Canada

Also check the deals for one-way flights from Seattle to Keflavik in June.

Skyscanner

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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