Seattle (SEA) to Seoul (ICN) is about 5,203 miles (8,373 km), roughly 10 h 55 min of flying time. Seoul is 17 hours ahead of Seattle in January, and 16 hours ahead of Seattle in July.
When is the cheapest time to fly from Seattle to Seoul?
Lowest round-trip fares found in recent searches for each month (7 to 14 day trips). Pick a cheap month, then confirm the live price.
Are there nearby airports that could be cheaper?
Fares at a neighboring airport are sometimes lower. Worth comparing on this route:
- PAEPaine Field a small commercial terminal in Everett, north of Seattle.
- GMPGimpo International Airport closer to central Seoul, mostly domestic and regional flights.
What do I need before flying to Seoul?
This is an international trip, so you need a valid passport. Entry rules, visas and health requirements change, so check the official US State Department page before you book: South Korea travel information.
Plan how you will stay connected; an eSIM is usually cheaper than your carrier's roaming plan. See travel services.
Stay connected in Seoul
An eSIM gives you local data from the moment you land, usually far cheaper than roaming.
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Things to do in Seoul
Popular attractions and tickets, most with free cancellation.
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Frequently asked questions
How far is Seattle from Seoul by plane?
The great-circle distance between SEA and ICN is about 5,203 miles (8,373 km).
How long does it take to fly from Seattle to Seoul?
About 10 h 55 min of flying time based on distance, if a nonstop flight operates. Actual schedules vary by airline and wind, and itineraries with connections take longer.
What is the time difference between Seattle and Seoul?
Seoul is 17 hours ahead of Seattle in January, and 16 hours ahead of Seattle in July.
Distance and flying time are calculated from airport coordinates (OurAirports data) and a typical cruise speed; they are planning estimates, not schedules. Updated 2026-10-28.
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