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Cheap flights from Incheon Intl Airport to Seattle from £387

ICN — SEA
20 Oct — 27 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Incheon Intl to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Incheon Intl to Seattle

Wed 28/1007:30 -
1 stop28h 15m
Wed 11/1121:30 -
1 stop39h 35m
Deal found 15/9£656
Mon 9/1107:30 -
1 stop28h 15m
Wed 25/1121:30 -
1 stop28h 40m
Deal found 20/9£662
Tue 27/1020:40 -
1 stop13h 51m
Tue 10/1119:33 -
1 stop32h 47m
Deal found 15/9£673
Tue 27/1020:40 -
1 stop13h 51m
Wed 11/1108:54 -
1 stop19h 26m
Deal found 15/9£675
Sat 26/920:30 -
1 stop39h 35m
Tue 13/1023:10 -
1 stop28h 05m
Deal found 17/9£676
Sun 25/1007:30 -
1 stop28h 15m
Mon 9/1121:30 -
1 stop39h 35m
Deal found 15/9£679
Wed 28/1020:00 -
2 stops38h 22m
Wed 11/1108:40 -
1 stop15h 30m
Deal found 15/9£684
Tue 27/1020:40 -
1 stop13h 51m
Sun 8/1107:18 -
1 stop21h 02m
Deal found 15/9£687
Wed 28/1019:45 -
1 stop14h 48m
Tue 10/1119:33 -
1 stop32h 47m
Deal found 15/9£688
Wed 28/1019:45 -
1 stop14h 48m
Sat 14/1119:33 -
1 stop32h 47m
Deal found 15/9£690
Wed 28/1017:55 -
1 stop12h 42m
Tue 10/1115:15 -
1 stop32h 55m
Deal found 15/9£692
Wed 21/1007:20 -
1 stop28h 45m
Sun 25/1022:30 -
1 stop21h 30m
Deal found 19/9£693

Find flight deals from Incheon Intl to Seattle

Round-trip from

£644

One-way from

£387

Popular in

June

Cheapest in

November

Average price

£609

Good one-way deal

£631 or less
Philippine Airlines
  • Philippine Airlines
  • 31/1-3/6
  • 2 total stops
  • 66h 35m total
  • Incheon to Seattle
Search Deals
27/10-31/12
  • 27/10-31/12
  • 1 total stop
  • 26h 28m total
  • Incheon to Seattle
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£102 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Price to beat on a one-way flight from Incheon Intl to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Incheon Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Sat 21/11

20:30-18:45

1 stop39h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£400

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Tue 17/11

20:30-18:45

1 stop39h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£400

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Sun 22/11

07:30-18:45

1 stop28h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£400

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Wed 16/12

20:30-18:45

1 stop39h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£400

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Wed 17/3

18:00-21:12

3 stops43h 12m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£609

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 17/12

12:45-21:25

3 stops25h 40m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£617

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Tue 17/11

18:45-11:51

Nonstop10h 06m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£624

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Mon 19/10

19:00-13:14

Nonstop10h 14m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£624

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 19/11

18:45-11:51

Nonstop10h 06m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£624

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 15/10

16:40-10:40

Nonstop10h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-17:00

Nonstop0h 00m

£626

Flights are sorted by cheapest return flights first.

Deals found on 19/9

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Incheon Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Incheon Intl with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Incheon Intl Airport to Seattle

How far ahead should I book a flight from Incheon Intl Airport to Seattle?

To ensure you get the cheapest price possible for a flight from Incheon Intl Airport to Seattle, you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Incheon Intl Airport to Seattle?

Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of £428). Flying from Incheon Intl Airport to Seattle in June is currently the most expensive (average of £824). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ICN to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Incheon Intl Airport to Seattle as you normally would.

How much does it cost for a return flight from Incheon Intl Airport to Seattle?

Airfare is typical for this route at the moment.

Incheon Intl Airport to Seattle flights typically cost between £344 and £704 in January.
The cheapest return price found within the last 5 days was £644 on Philippine Airlines (31 Jan–4 Jun).

Related info for your journey

  • What airport do you fly into for flights to Seattle from Incheon Intl?

    If you book a flight to Seattle from Incheon Intl, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 7 flights from Incheon Intl to Seattle/Tacoma Intl per day from 0 different airlines.

  • How long is the flight from Incheon Intl Airport to Seattle?

    A quick flight from Incheon Intl Airport to Seattle can take about 39h 35m. Philippine Airlines provides one of the quickest options available for as low as £676. The distance from Incheon Intl Airport to Seattle is about 5200 mi.

  • What are the most reliable airlines from Incheon Intl Airport to Seattle?

    The top 3 most reliable airlines when flying from Incheon Intl Airport to Seattle are Delta (77%), Korean Air (77%) and Alaska Airlines (52%).

  • Can I find deals for flights from Incheon Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Incheon Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Incheon Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Incheon Intl to Seattle.

  • Can I find deals for business class flights from Incheon Intl to Seattle?

    Yes. Cheapflights offers flight deals from Incheon Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Incheon Intl Airport to Seattle?

    Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of £428). Flying from Incheon Intl Airport to Seattle in June is currently the most expensive (average of £824). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Federal Way
SeaTac

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