The cheapest times to fly from SEA to ICN are

  • February 5th to May 13th (except the weeks of February 19th and March 26th)
  • August 27th to December 2nd

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to ICN is late September. Prices can be as high as $1388 for Friday flights during mid December, or as low as $728 for Tuesday flights around late September.


When to Fly to Seoul

Flying from Seattle, WA (SEA) to Seoul (ICN) will usually cost between $743 to $1150 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $776. Due to high demand the most expensive time to fly is mid December, with an average price of $1259. Planning your trip to low-cost times can easily save you $484 on economy flights and even more on first-class flights. Generally, any price below $870 can be considered a good price for a round-trip SEA to ICN flight.

See below for a graph of average weekly prices for the SEA to ICN route. All prices are for round-trip tickets in USD.

SEA to ICN Flight Prices

Compared to other flights, the SEA to ICN flight is cheaper than the average and costs less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly to Seoul, and Saturdays are the most expensive days to return to Seattle. Selecting flights on the least expensive days could save you up to $118 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $833. Return trip prices are from the ICN to SEA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SEA to ICN can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 10 hour 21 minutes may be realistic.


Flight Hacking SEA to ICN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SEA to ICN — but Champion Traveler does!

Hack #1: Shanghai (SEA > PVG > ICN)

  • Price for both tickets: $809
  • Average savings: $62 (7.07%)

See SEA to PVG flights

Hack #2: Hong Kong (SEA > HKG > ICN)

  • Price for both tickets: $828
  • Average savings: $43 (4.89%)

See SEA to HKG flights

Hack #3: Beijing (SEA > PEK > ICN)

  • Price for both tickets: $849
  • Average savings: $21 (2.41%)

See SEA to PEK flights


Flight Questions Answered

Still have questions about flying from SEA to ICN? We’ve got answers.

Which airlines fly this route?

You can find 28 major airlines flying this route most often: Aeromexico, Air Canada, Air China, Alaska, American, ANA, Asiana, British Airways, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Ethiopian, EVA Air, Fiji Airways, Hainan, Hawaiian, JAL, KLM, Korean Air, Lufthansa, Shanghai Airlines, Silver Airways, Singapore Airlines, THAI, United, Xiamen, and potentially more during busy seasons.

How far away is it from Incheon International Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 5202 miles or 8372 kilometers.

How long does it take to fly from SEA to ICN?

The real-world flight time for a nonstop SEA to ICN flight is about 10 hour 21 minutes.

How many flights go between Seattle, WA and Seoul?

It depends on the day of the week and the date, but a typical day might have around 82 available flights from SEA to ICN.


Airport Location Info


Departing Airport

Origination code SEA
Origination airport name Seattle/Tacoma International Airport
City Seattle, WA
Country the United States
Latitude 47.5
Longitude -122.3

Return Airport

Destination code ICN
Destination airport name Incheon International Airport
City Seoul
Country South Korea
Latitude 37.5
Longitude 126.4


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.