Route guide

Seattle to Seoul (SEA-ICN): Nonstop Upgrade & Award Space

Korean Air, Delta Air Lines, Alaska Airlines, Inc., and Asiana Airlines fly nonstop between Seattle (SEA) and Seoul (ICN), roughly 25 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every SEA to ICN departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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25
Nonstop flights a week
5,204 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every SEA to ICN departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Seattle to Seoul to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each SEA to ICN departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See SEA to ICN on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to Seoul nonstop

Carriers operating SEA to ICN nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Korean Air
  • Delta Air Lines
  • Alaska Airlines, Inc.
  • Asiana Airlines
See SEA to ICN on the interactive map →

Frequently asked questions about SEA to ICN

How far is Seoul from Seattle?
SEA to ICN covers about 5,204 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from SEA to ICN?
Korean Air, Delta Air Lines, Alaska Airlines, Inc., and Asiana Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on all four of them.
How many flights a week are there from SEA to ICN?
About 25 nonstop flights a week run between Seattle and Seoul in the current schedule, operated by Korean Air, Delta Air Lines, Alaska Airlines, Inc., and Asiana Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on SEA to ICN?
Open the SEA to ICN calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Seattle to Seoul route, and 2LNR will notify you when space opens. It's free to start.

Never miss SEA to ICN upgrade or award space

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