ICN to SEA: Distance and Flight Time
The distance from Incheon International Airport (ICN) to Seattle–Tacoma International Airport (SEA) is 8,373 km (5,203 mi). A typical nonstop flight covers it in about 11h, heading northeast. The distance is the same in either direction (SEA to ICN).
How far is it from Seoul to Seattle?
The great-circle distance between Incheon International Airport (ICN) and Seattle–Tacoma International Airport (SEA) is 8,373 km (5,203 mi, 4,521 nautical miles). That is the straight-line distance; a real flight is a little longer because of air-traffic routing.
How long is the flight from ICN to SEA?
A nonstop flight typically takes about 11h. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. SEA is roughly northeast of ICN.
How is the ICN to SEA route written in code?
The pair is written ICN-SEA in IATA codes and RKSI-KSEA in ICAO codes, the form used on a flight plan. Incheon International Airport is ICN (RKSI), Seattle–Tacoma International Airport is SEA (KSEA).
| ICN | SEA | |
|---|---|---|
| Airport | Incheon International Airport | Seattle–Tacoma International Airport |
| ICAO code | RKSI | KSEA |
| Country | South Korea | United States |
| Elevation | 23 ft | 433 ft |
| Rank by connections | #14 | #67 |
RKSI starts with R, the ICAO prefix for East Asia; KSEA starts with K, the prefix for the contiguous United States. How ICAO prefixes are laid out.
SEA sits 410 ft (125 m) higher than ICN, which is a real difference in air density on takeoff.
Airlines flying ICN to SEA
2 airlines appear on this route in the open route dataset, 2 of them still listed as active. Each row gives the IATA code, the ICAO code and the radio callsign, which is what an air traffic controller hears:
| IATA | Airline | ICAO | Callsign | Status |
|---|---|---|---|---|
| KE | Korean Air | KAL | Koreanair | Active |
| OZ | Asiana Airlines | AAR | Asiana | Active |
A further 2 carriers sell this pair as a codeshare without operating it: DL, UA.
Route and carrier data comes from the OpenFlights open dataset, regenerated here on . It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.
Frequently asked questions
How far is Seoul from Seattle?
Incheon International Airport (ICN) and Seattle–Tacoma International Airport (SEA) are 8,373 km (5,203 mi, 4,521 nautical miles) apart in a straight line.
How long is the flight from ICN to SEA?
A typical nonstop flight between ICN and SEA takes about 11h. Actual times vary with aircraft type, winds and routing.
What direction is SEA from ICN?
Seattle–Tacoma International Airport (SEA) lies roughly northeast of Incheon International Airport (ICN).
Which airlines fly ICN to SEA?
2 airlines appear on the ICN-SEA route in the open dataset, including Korean Air, Asiana Airlines.
Related routes
Other routes from Seoul (ICN):
Other routes from Seattle (SEA):
ICN airport code · SEA airport code · Busiest airports worldwide