The Seattle–Seoul route
SEA–ICN is a long-haul pairing from the United States to Seoul: roughly 5,204 miles. Nonstop SEA–ICN is often on the schedule, about 10.5 hours airborne over 5,204 miles. Overnight westbound is common; compare arrival local time, not only the duration field.
For SEA–ICN we show about $399 on the low end and around $710 as a more typical one-way economy total, USD, last reviewed August 2026. Long-haul sale banners expire; a $399 one-way is a planning floor, not a coupon. Taxes, bags, and seats change what you pay on the seller site.
Search SEA to ICN on Azurovia, compare airline-direct and travel-site totals on the same flights, then finish with the seller. We do not ticket. Keep their confirmation for changes.
Distance and time SEA–ICN
Great-circle distance SEA–ICN is about 5,204 miles. Block time on a nonstop is typically near 10.5 hours; wind, routing, and which runway you use still move the clock. Connections on the same city pair add layover time on top of that flying.
Seoul is about 17 hours ahead of Seattle on standard time (America/Los_Angeles vs Asia/Seoul). Arrival clocks on ICN are local. That matters more on this pair than on a same-zone hop.
When SEA–ICN has a nonstop, that is usually the cleanest product. One-stop options still appear — they are worth opening only if the USD total is materially lower after you count the extra ground time.
Airports for Seattle to Seoul
You depart Seattle-Tacoma International in Seattle, United States, and arrive at Incheon International in Seoul, South Korea. SEA is the origin code we use on this guide; ICN is the arrival code. If you need a visa or an ESTA, that is between you and the destination government — Azurovia does not ticket and does not process immigration.
SEA is the only origin code we list in this metro. ICN is the arrival code we treat as primary for Seoul. A cheaper nearby airport only wins if the transfer still fits your plan. Search with “include nearby airports” when you want those codes in one results list.
Airport pages: SEA Seattle-Tacoma International · ICN Incheon International
City hubs: Flights from Seattle · Flights to Seoul
Bags on SEA–ICN
Long-haul SEA–ICN fares sometimes include a checked bag on the airline site and unbundle it on a travel site, or the reverse. Rank the USD total you will actually pay, including bags, before you click out. Azurovia does not ticket.
Airlines often shown
United is among the names that commonly appear on SEA–ICN, alongside Delta, American Airlines, ANA. That is who often operates or sells this city pair in our catalog, not a daily guarantee. Live search is the inventory that exists for your dates.
When people fly
On Seattle–Seoul, demand is often softer in Mar and Apr, with Oct and Nov also worth checking. US holidays still reprice this pair. Move a day on the results strip before you assume the first date you typed is the cheapest.
Save this route
We’ll email you if live fares on this city pair drop. Search with dates for a specific trip.
Questions about this city pair
How long is the flight from Seattle to Seoul?
Nonstop SEA–ICN is typically about 10.5 hours over roughly 5,204 miles. Connections take longer; compare total trip time on the results page.
When are Seattle to Seoul fares often lower?
Demand is usually softer in Mar and Apr on this route, but live prices move daily. Search a few nearby dates rather than assuming a season is always cheapest.
Which airlines fly Seattle to Seoul?
Sellers commonly show United, Delta, American Airlines, ANA on this city pair. The set on any given day depends on schedule and which travel sites return a fare.
What do Seattle–Seoul tickets usually cost?
Guide one-way economy totals cluster around $710, with sales near $399, in USD. Those are not a quote — live search is the price that matters.
Is SEA–ICN the only airport pair for this trip?
This guide uses SEA and ICN as the primary codes. If a seller offers another airport, it will show on live results when you include nearby airports.
Do I book Seattle–Seoul with Azurovia?
No. Azurovia is a US metasearch. You compare airline and travel-site totals here, then complete the ticket with the seller you choose.