Cheapest one-way flights from Seattle to Keflavik in July from 279€

AirHint found the following cheapest one-way flights from Seattle (SEA) to Keflavik (KEF) in July 2025 (see full year).

One-Way flights

16 Jul Alaska Airlines
15 Jul WestJet
10 Jul WestJet
13 Jul Alaska Airlines
08 Jul Air France
09 Jul KLM
07 Jul Air France
20 Jul Air France
11 Jul Spirit Airlines
12 Jul Icelandair direct

Also check the deals for return flights from Seattle to Keflavik in July.

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.