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Cheap Flights from Seattle to Incheon International

Compare Seattle to Incheon International flight deals

Find the cheapest month or even day of the year to fly to Incheon International

Book the best Incheon International fare with no extra fees

Flight deals from Seattle to Incheon International

Looking for a cheap last-minute deal or the best return flight from Seattle to Incheon International Airport? If you want to travel next month, return fares start from ج.م.‏ 48,393. Find the lowest prices on one-way and return tickets right here.
Seoul.ج.م.‏ 19,025 per passenger.Departing Mon, 31 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 31 Aug, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 19,025, select.
Seoul.ج.م.‏ 24,101 per passenger.Departing Fri, 31 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 31 Jul, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 24,101, select.
Seoul.ج.م.‏ 24,174 per passenger.Departing Mon, 20 Jul.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Mon, 20 Jul, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 24,174, select.
Seoul.ج.م.‏ 24,782 per passenger.Departing Tue, 15 Sep.One-way flight with Cathay Pacific.Outbound indirect flight with Cathay Pacific, departs from Seattle / Tacoma International on Tue, 15 Sep, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 24,782, select.
Seoul.ج.م.‏ 27,450 per passenger.Departing Fri, 30 Oct.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Fri, 30 Oct, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 27,450, select.
Seoul.ج.م.‏ 28,321 per passenger.Departing Sat, 15 Aug.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Sat, 15 Aug, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 28,321, select.
Seoul.ج.م.‏ 28,856 per passenger.Departing Tue, 10 Nov.One-way flight with Hainan Airlines.Outbound indirect flight with Hainan Airlines, departs from Seattle / Tacoma International on Tue, 10 Nov, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 28,856, select.
Seoul.ج.م.‏ 29,272 per passenger.Departing Sat, 5 Dec.One-way flight with Hainan Airlines.Outbound indirect flight with Hainan Airlines, departs from Seattle / Tacoma International on Sat, 5 Dec, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 29,272, select.
Seoul.ج.م.‏ 29,907 per passenger.Departing Sun, 14 Jun.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Sun, 14 Jun, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 29,907, select.
Seoul.ج.م.‏ 30,729 per passenger.Departing Mon, 22 Feb.One-way flight with Philippine Airlines.Outbound indirect flight with Philippine Airlines, departs from Seattle / Tacoma International on Mon, 22 Feb, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,729, select.
Seoul.ج.م.‏ 30,875 per passenger.Departing Tue, 15 Sep.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Tue, 15 Sep, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,875, select.
Seoul.ج.م.‏ 30,953 per passenger.Departing Tue, 10 Nov.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Tue, 10 Nov, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,953, select.
Seoul.ج.م.‏ 30,963 per passenger.Departing Wed, 7 Oct.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Wed, 7 Oct, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,963, select.
Seoul.ج.م.‏ 30,984 per passenger.Departing Sat, 6 Feb.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Sat, 6 Feb, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,984, select.
Seoul.ج.م.‏ 30,984 per passenger.Departing Sat, 23 Jan.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Sat, 23 Jan, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 30,984, select.
Seoul.ج.م.‏ 31,004 per passenger.Departing Mon, 5 Apr.One-way flight with Asiana Airlines.Outbound direct flight with Asiana Airlines departs from Seattle / Tacoma International on Mon, 5 Apr, arriving in Incheon International.Price includes taxes and charges.From ج.م.‏ 31,004, select.

Find the cheapest month to fly from Seattle to Incheon International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Incheon International flights are currently cheapest in August.
Jun
from ج.م.‏ 29,907
Jul
from ج.م.‏ 24,101
Aug
from ج.م.‏ 19,025
Sep
from ج.م.‏ 24,782
Oct
from ج.م.‏ 27,450
Nov
from ج.م.‏ 28,856
Dec
from ج.م.‏ 29,272
Jan
from ج.م.‏ 30,984
Feb
from ج.م.‏ 30,729
Mar
from ج.م.‏ 31,082
Apr
from ج.م.‏ 31,004
May
from ج.م.‏ 33,989

Direct flights from Seattle to Incheon International

Seattle to Incheon International: Alternative routes

Compare routes from Seattle to Seoul below. You may find an airport to fly into that's cheaper, faster, or easier than Incheon International.

Gimpo International

17km from central Seoul
Closest
from ج.م.‏ 27,474
Search flights

Incheon International

48km from central Seoul
Cheapest
from ج.م.‏ 19,025
Search flights

Seattle to Seoul: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 19,025
Cheapest month to flyAugust
Average flight time11 hrs, 58 mins
Most popular airlineDelta
Average flights per week60

Finding cheap flights from Seattle to Incheon International: Frequently asked questions

The best price we found for a return flight from Seattle to Incheon International is ج.م.‏ 44,112. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
11 hours and 58 minutes is the average flight time from Seattle to Incheon International.
Delta, Korean Air and Asiana Airlines fly direct from Seattle to Incheon International.
As of June 2026, there are 60 flights per week flying from Seattle to Incheon International.
The cheapest month to fly from Seattle to Incheon International is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Incheon International Airport on Tuesday, 15 September 2026.
Yes – the average flight time is 11 hours and 58 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Incheon International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seoul is around 40 days in advance, so don’t leave your flight to the last minute.

Flying from Seattle to Seoul Incheon International Airport (ICN): What you need to know

  • Seattle's main base, Seattle-Tacoma International Airport (SEA), is where great travel stories take off. Explore the options for leaving from here when booking your flight from Seattle to Seoul Incheon International Airport (ICN).

  • Jump on a direct Seattle to Seoul Incheon International Airport flight and you'll be in the air for around 11 hours 50 minutes.

  • Seoul Incheon International Airport is located in Seoul. The city operates on the UTC+9 timezone and is 17 hours ahead of Seattle.

  • You can choose from 29 direct services each week between Seattle-Tacoma International Airport (SEA) and Seoul Incheon International Airport (ICN). This is the most popular route when departing from Seattle.

  • Give yourself plenty of time to catch your flight from Seattle to ICN. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • Peak months like July or holiday periods such as Christmas and New Year will mean bigger lines at check-in and security. Travelling then? Play it safe and head to the airport even earlier. Arriving two hours before a domestic flight and up four hours ahead of international flights is a wise idea.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Enjoy an uninterrupted journey from Seattle-Tacoma International Airport (SEA). Direct flights from Seattle to Seoul Incheon International Airport (ICN) can be booked from here.

  • These are some of the well-known airlines operating direct flights from Seattle to Seoul Incheon International Airport taking off from SEA:

  • The airline with the highest booking numbers between SEA and ICN is Delta.

  • Delta is the leading carrier for punctuality on this route.

  • Stopovers are the perfect opportunity to take a travel break and possibly even explore another city. When searching for cheap flights from Seattle to ICN leaving from Seattle-Tacoma International Airport (SEA), uncheck the 'Direct flights only' box to discover where you can stop along the way. Some popular options include:

    • Las Vegas Harry Reid International Airport (LAS)

    • Vancouver International Airport (YVR)

    • Tokyo Narita International Airport (NRT)

  • SEA is about 23 kilometres from central Seattle. If you're ride-sharing, driving or catching a taxi from the centre, it'll take 25 minutes or so to get there, depending on traffic conditions. If you're planning to take public transport, expect the trip time to be around 35 minutes.

  • Want an easy start to your travels? Stay near Seattle-Tacoma International Airport. Whether you're boarding an early flight from Seattle to Seoul Incheon International Airport or just don't like being rushed, these hotels offer the perfect solution:

  • Seattle-Tacoma International Airport gets top marks for on-time performance. 80% of flights that take off from SEA reach their destination on time.

Seattle Paine Field International Airport (PAE)

  • You can arrive at PAE from central Seattle in approximately 40 minutes by car, depending on traffic conditions. The journey on public transport will take roughly 1 hour 30 minutes to cover the 40 kilometres or so.

  • Start your holiday early with an extra night away from home. Before your Seattle to ICN flight, stay in one of these hotels near Seattle Paine Field International Airport:

  • Flights from Seattle Paine Field International Airport have a reputation for punctuality, with 80% of them touching down within the expected time frame.

About Seoul Incheon International Airport (ICN)

  • If you're arriving on a late flight from Seattle to Seoul Incheon International Airport, few things top the convenience of staying near the terminal. Pick up your bags from the carousel and then be showered and snoozing soon after at one of these options near ICN:

  • To lock in the lowest price, reserve your ride around four weeks ahead of your Seattle to Seoul Incheon International Airport flight.

Getting from Seoul Incheon International Airport (ICN) to central Seoul

  • Seoul Incheon International Airport is around 48 kilometres from central Seoul. It takes around 1 hour 5 minutes or so to get to the city by car.

  • Travelling by public transport takes roughly 50 minutes.

How to find the cheapest flights from Seattle to Seoul Incheon International Airport (ICN)

  • ج.م.‏ 19,025 is the best price for a one-way ticket from Seattle to Seoul Incheon International Airport. Return flights start from ج.م.‏ 44,112. These fares may change based on availability.

  • Book three months before you travel. Pricing trends show that this is the ideal window for finding cheap flights from Seattle to ICN.

  • August is when you're most likely to find a bargain on a Seattle to Seoul Incheon International Airport ticket. If you're looking to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • You don't need to search every day to find out if prices have dropped when you set up a Price Alert. We'll notify you the moment a better deal comes up on plane tickets from Seattle to ICN.

  • Tailor your flights using filters. Choose your preferred departure and arrival times, airlines and total journey duration. You can also sort the results by 'Fastest,' 'Cheapest' or 'Best' flights from Seattle to Seoul Incheon International Airport.

The best time to fly from Seattle to Seoul Incheon International Airport (ICN)

  • December is the quietest month for flights from Seattle to Seoul Incheon International Airport (ICN), while January is the most popular. Figure out the ideal time to visit Seoul based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • Book a Seattle to ICN plane ticket departing in August if you want to experience the city during its warmest month. Expect temperatures in Seoul to range from 19ºC to 32ºC.

  • If you'd rather travel in cooler conditions, look for a cheap ticket from Seattle to Seoul Incheon International Airport in January when temperatures are between -12ºC and 4ºC.

More about Seoul

  • Start your Seoul trip right by choosing the ideal place to stay. As soon as you've booked your flight from Seattle to Seoul Incheon International Airport, check out our selection of accommodation options including:

  • There are so many things to see and do in this city, it can be hard to figure out where to start. Gyeongbokgung Palace, Bukchon Hanok Village and N Seoul Tower are popular attractions which should be on any good Seoul itinerary.

Explore more of South Korea

  • You've done Seoul, now it's time to discover more of South Korea. Travel about 257 kilometres southeast to Daegu to tick off its leading sights. From Alive Aquarium Daegu to Nature Park and Seonsa Historical Park, there's plenty to keep you on the go.

  • If you're interested in discovering another major destination in South Korea, head for Daejeon, roughly 153 kilometres southeast of Seoul. National Science Museum, Temi Park and Yuseong Hot Springs are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.