Seattle-Tacoma International (SEA) to Keflavik International (KEF).
| Departure | Return | Price |
|---|---|---|
| 05/31/2026 | 06/05/2026 | $495 |
| 05/31/2026 | 06/06/2026 | $495 |
| 05/31/2026 | 06/07/2026 | $495 |
| 05/31/2026 | 06/08/2026 | $495 |
| 05/31/2026 | 06/09/2026 | $495 |
| 07/25/2026 | 07/30/2026 | $495 |
| 05/25/2026 | 06/02/2026 | $499 |
| 05/25/2026 | 06/03/2026 | $499 |
| 05/26/2026 | 06/02/2026 | $499 |
| 05/26/2026 | 06/03/2026 | $499 |
Based on current fares, May is the cheapest month to fly from Seattle to Reykjavik, with average fares around $557 round trip (as low as $495).
August tends to be more expensive, averaging $676.
See the full month-by-month and day-of-week price analysis
Best Time to Fly SEA → KEFDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Seattle to Reykjavik is May, with average round-trip fares around $557. Fares in May start as low as $495. The most expensive month is August, averaging $676.
A nonstop flight from Seattle to Reykjavik takes approximately 7h.
The cheapest flight from Seattle to Reykjavik currently starts at $495 round trip in economy class.
The average round-trip flight price from Seattle to Reykjavik is $610 in economy class.
The distance is 3356 miles (5400 km). with a nonstop flight time of about 7h. The lowest fare currently available is $495 departing in May. The average round-trip fare is $610.
Set up a guest alert and we'll keep checking prices for you. No account needed.
Get Started Free →