Seattle-Tacoma International (SEA) to Incheon International (ICN). Served by Delta, Korean Air.
| Departure | Return | Price |
|---|---|---|
| 07/14/2026 | 07/19/2026 | $906 |
| 07/14/2026 | 07/23/2026 | $906 |
| 07/15/2026 | 07/23/2026 | $906 |
| 07/17/2026 | 07/23/2026 | $906 |
| 07/18/2026 | 07/23/2026 | $906 |
| 07/05/2026 | 07/14/2026 | $1120 |
| 07/06/2026 | 07/14/2026 | $1120 |
| 07/08/2026 | 07/14/2026 | $1120 |
| 07/09/2026 | 07/14/2026 | $1120 |
| 07/06/2026 | 07/15/2026 | $1126 |
Based on current fares, July is the cheapest month to fly from Seattle to Seoul, with average fares around $1158 round trip (as low as $906).
June tends to be more expensive, averaging $1470.
See the full month-by-month and day-of-week price analysis
Best Time to Fly SEA → ICNDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Seattle to Seoul is July, with average round-trip fares around $1158. Fares in July start as low as $906. The most expensive month is June, averaging $1470.
A nonstop flight from Seattle to Seoul takes approximately 11h.
Delta and Korean Air fly from SEA to ICN. That's 2 airlines serving this route.
The cheapest flight from Seattle to Seoul currently starts at $906 round trip in economy class.
The average round-trip flight price from Seattle to Seoul is $1385 in economy class.
The distance is 5211 miles (8384 km). with a nonstop flight time of about 11h. Airlines on this route include Delta, Korean Air. The lowest fare currently available is $906 departing in July. The average round-trip fare is $1385.
Set up a guest alert and we'll keep checking prices for you. No account needed.
Get Started Free →