AirportMiles

Seoul (ICN) – Seattle (SEA)

Flights on GoogleSkyscanner
Distance, flight time and the airlines that fly it, from open data.
Distance
8,394 km
5,216 mi · 4,533 nm
Flight time
9 h 59 min / 11 h 41 min
Average gate to gate: ICN → SEA / back
Time difference
17 h / 16 h
January / July
CO2 per passenger
980 kg
One way, economy, incl. RF (580 kg CO2 only)
Passengers / year
642,521
Aug 2025 – Jul 2026 · +17.6%
Flights / week
49
Both directions, average
Seats filled
82%
779,449 seats a year
Airlines nonstop
5
KE, DL, OZ

Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources

Great circle from ICN to SEAICNSEA
Shortest path over the earth's surface (great circle). Real flights bend around weather, winds and airspace.

The way there

Heading from ICN
41°
Heading from SEA
310°
Halfway point
58.19, 175.43
Great-circle km
8,373 km (sphere, for EU261)
In the air ICN → SEA
9 h 23 min
In the air SEA → ICN
11 h 9 min
Clocks
17 h in January, 16 h in July

The estimate for a route without real times is 10 h 40 min; how it is worked out is on Sources.

Passengers per month, both directions (Aug 2025 – Jul 2026)Busiest: March 2026: 61,480 passengers
050K100KAugSepOctNovDecJanFebMar61.5KAprMayJunJul
Show as a table
Month Passengers
Aug 202550,493
Sep 202546,555
Oct 202551,802
Nov 202550,160
Dec 202552,492
Jan 202649,642
Feb 202646,606
Mar 202661,480
Apr 202656,825
May 202659,177
Jun 202658,205
Jul 202659,084
Flights per month, both directions (Aug 2025 – Jul 2026)Busiest: May 2026: 228 flights
0100200300AugSepOctNovDecJanFebMarAprMay228JunJul
Show as a table
Month Flights
Aug 2025184
Sep 2025192
Oct 2025220
Nov 2025213
Dec 2025215
Jan 2026216
Feb 2026195
Mar 2026217
Apr 2026221
May 2026228
Jun 2026215
Jul 2026222

Airlines flying ICN–SEA nonstop

Airline Flights / week Share of passengers
KEKorean Air Lines14
31%
DLDelta Air Lines14
28%
OZAsiana Airlines11
23%
ASAlaska Airlines6.5
12%
HAHawaiian Airlines3.0
5%

Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources

Aircraft on this route

  • Airbus Industrie A350-900 · 1,293 flights
  • Boeing 787-10 Dreamliner · 616 flights
  • B787-900 Dreamliner · 609 flights
  • Boeing 767-400/ER · 10 flights
  • Airbus Industrie A330-300/333 · 6 flights
  • Boeing 767-300/300ER · 3 flights
  • Airbus Industrie A330-900 · 1 flight

Also carried: 17,657 tonnes of freight and 125 tonnes of mail a year (passenger and cargo flights).

Delay compensation (EU261 / UK261)

Measured by great-circle distance: 8,373 km.

Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).

Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.

Every airport pair between Seoul and Seattle

SEABFI
ICN8,3948,389
GMP8,3678,362

Kilometres. Linked numbers have a page of their own. All Seoul airports · All Seattle airports

More routes from ICN

Route Distance Passengers
ICN → NRT1,260 km 2,519,026 (6 mo)
ICN → KIX862 km 2,313,960 (6 mo)
ICN → FUK563 km 1,708,245 (6 mo)
ICN → HKG2,067 km 1,316,010 (6 mo)
ICN → TPE1,460 km 1,184,972 (6 mo)
ICN → PVG821 km 1,111,272 (6 mo)
ICN → BKK3,665 km 950,069 (6 mo)
ICN → DAD2,976 km 941,076 (6 mo)
ICN → SIN4,614 km 900,158 (6 mo)
ICN → TAO580 km 797,360 (6 mo)

More routes from SEA

Route Distance Passengers / year
SEA → DEN1,648 km 1,819,437
SEA → PHX1,781 km 1,813,338
SEA → LAX1,535 km 1,810,795
SEA → ANC2,331 km 1,694,688
SEA → SFO1,092 km 1,628,228
SEA → ORD2,769 km 1,622,991
SEA → LAS1,394 km 1,596,435
SEA → DFW2,671 km 1,577,921
SEA → SAN1,690 km 1,233,726
SEA → SLC1,108 km 1,106,553

Questions

Seoul (ICN) and Seattle (SEA) are 8,394 km (5,216 miles, 4,533 nautical miles) apart, measured along the shortest path over the earth's surface.