Seattle (SEA) to Seoul (ICN) flights
Korean Air, Delta Air Lines, Alaska Airlines, Asiana Airlines fly nonstop from Seattle-Tacoma International Airport to Incheon International Airport, with about 25 flights a week in July 2026. The 5,217-mile flight takes about 5h 40m gate to gate.
From
SEA
Seattle
Seattle-Tacoma International Airport
To
ICN
Seoul
Incheon International Airport
- Distance
- 5,217 mi · 8,396 km
- Flight time
- 5h 40m
- Airlines
- 4
- Seats filled
- 84%
Flights a week, July 2026
1,252 flights and 321,758 passengers in 12 months
Airlines flying SEA to ICN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Korean Air | 7 | Boeing 787-10 Dreamliner, Boeing 787-9 Dreamliner | 99,767 | 0m |
| Delta Air Lines | 7 | Airbus A350-900 | 89,961 | 11h 40m |
| Alaska Airlines | 6 | Boeing 787-9 Dreamliner | 38,195 | 11h 36m |
| Asiana Airlines | 5 | Airbus A350-900 | 75,225 | 0m |
| Hawaiian AirlinesSeasonal or ended | n/a | Boeing 787-9 Dreamliner | 18,610 | 11h 56m |
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 | 23,607 | |
| September 2025 | 96 | 20,664 | |
| October 2025 | 110 | 29,391 | |
| November 2025 | 106 | 26,269 | |
| December 2025 | 105 | 28,356 | |
| January 2026 | 105 | 22,931 | |
| February 2026 | 96 | 25,654 | |
| March 2026 | 107 | 30,770 | |
| April 2026 | 107 | 24,997 | |
| May 2026 | 112 | 30,739 | |
| June 2026 | 105 | 30,411 | |
| July 2026 | 111 | 27,969 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.