Seattle to Seoul
Flights from Seattle to Seoul
Seattle (SEA) has nonstop flights to Seoul Incheon (ICN) on four airlines, which gives you real choice on schedule, cabin and fare. Alaska Airlines joined the route in 2025, alongside Korean Air, Delta and Asiana.
- Flight time
- About 12 hours nonstop to Seoul
- Airlines flying direct
- Alaska, Korean Air, Delta and Asiana
- Airports
- Seattle (SEA) to Seoul Incheon (ICN)
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When to book
Fares to Korea often rise around the summer holidays, Korean holidays such as Chuseok and Lunar New Year, and the year-end period. If your dates can move, traveling outside those times gives your expert more options.
Direct vs. one-stop
Nonstop is the norm from Seattle, with four airlines to compare. One-stop itineraries rarely make sense on this route unless they save meaningfully or suit an onward connection.
When to call a travel expert
If this trip involves a stopover, a premium cabin, family seating, or anything urgent, a named expert can handle the whole itinerary in one conversation.
Comparing the Seattle to Seoul nonstops
Four airlines fly nonstop from Seattle to Seoul Incheon: Alaska Airlines, Korean Air, Delta and Asiana. Alaska added the route in September 2025 on a Boeing 787-9 Dreamliner and flies it several times a week, so the days it operates are worth checking against your dates.
Korean Air and Delta are SkyTeam partners, while Alaska Airlines is in oneworld, which can matter if you collect frequent flyer miles. Incheon is also a major connecting hub, so if Seoul isn't your final stop, the airline you choose can make an onward flight within Asia easier.
Catchaflight offers a discount on Alaska Airlines fares on this route. When you call, your expert compares all four nonstops, explains the change, refund and baggage rules for the exact fare, and quotes the full price before you agree to anything.
What our agents recommend for Seattle to Seoul
Choose seats for how you travel
An aisle is usually better if you need to stretch or use the restroom often; a window suits someone who prefers to settle in and sleep. For couples, two aisle seats across from each other keep you close without one person being stuck in the middle. Premium seating is worth comparing if the extra room would make a real difference on a 12-hour flight, but check the actual aircraft and seat first: extra-legroom economy isn't the same as a separate premium cabin.
Comparing seats across the four airlines? Call and we'll check the actual aircraft for your dates.
Call +1 (650) 514-3905The cabin and seat matter more than the logo
No airline is best for everyone, so we compare the actual flight, seat and fare rules for your dates rather than choosing on reputation alone. A higher price doesn't automatically mean you can cancel for a refund, so we read the ticket rules with you. If you already have miles or status with one airline, that may tip the balance.
What happens when you call
We ask your dates, how flexible you are, who's traveling and where you're staying, then talk about budget, seating preferences and any airport assistance. Before you pay, you get a written itinerary and price breakdown showing the total, including any agency fees. We check names against passports and explain when to expect your tickets and who to contact for help.
Continuing beyond Seoul? Call and we'll plan the onward flight on the same booking.
Call +1 (650) 514-3905Common questions
Which airlines fly nonstop from Seattle to Seoul?
Alaska Airlines, Korean Air, Delta and Asiana fly nonstop from Seattle to Seoul Incheon. Schedules vary by day and season, so your expert confirms what's flying on your dates.
How long is the flight from Seattle to Seoul?
About 12 hours nonstop heading to Seoul. The return flight to Seattle is usually shorter, thanks to tailwinds.
Does Alaska Airlines fly to Seoul every day?
Alaska Airlines flies Seattle to Seoul several times a week rather than daily, with extra flights planned in summer. Korean Air, Delta and Asiana give you other days to choose from.
Can I connect onward from Seoul?
Yes. Incheon is a major hub for flights across Asia. Tell your expert your final destination so they can compare airlines with good onward connections on one booking.
Do you offer a discount on Alaska Airlines flights to Seoul?
Yes. Catchaflight offers a discount on Alaska Airlines fares on this route. Your expert quotes the full price, including taxes and fees, before you pay.
Also see: Seattle to Tokyo, Seattle to Rome
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