Seattle (SEA) to Reykjavík (KEF) flights
Icelandair, Alaska Airlines fly nonstop from Seattle-Tacoma International Airport to Keflavik International Airport, with about 27 flights a week in July 2026. The 3,622-mile flight takes about 39m gate to gate.
From
SEA
Seattle
Seattle-Tacoma International Airport
To
KEF
Reykjavík
Keflavik International Airport
- Distance
- 3,622 mi · 5,829 km
- Flight time
- 39m
- Airlines
- 2
- Seats filled
- 79%
Flights a week, July 2026
733 flights and 100,897 passengers in 12 months
Airlines flying SEA to KEF
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Icelandair | 20 | Boeing 737 MAX 8, Airbus A321, Boeing 757-200 | 91,872 | 0m |
| Alaska Airlines | 7 | Boeing 737 MAX 8 | 9,025 | 7h 24m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 92 | 14,337 | |
| September 2025 | 72 | 10,300 | |
| October 2025 | 52 | 6,419 | |
| November 2025 | 30 | 4,595 | |
| December 2025 | 31 | 5,021 | |
| January 2026 | 31 | 4,337 | |
| February 2026 | 28 | 4,260 | |
| March 2026 | 35 | 2,121 | |
| April 2026 | 58 | 7,911 | |
| May 2026 | 72 | 9,678 | |
| June 2026 | 112 | 16,098 | |
| July 2026 | 120 | 15,820 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.