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Cheap flights from Incheon Intl Airport to Washington from $488

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to Washington departing on 6/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Incheon Intl Airport to Washington

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:35 pm - 2:05 pm
ICN
-
SEA
10h 30mnonstop
Multiple Airlines Logo
10:30 am - 6:45 pm
SEA
-
ICN
16h 15m
1 stop
$863Multiple Airlines
Wed, Jun 24 - Mon, Aug 31
Multiple Airlines Logo
7:35 pm - 2:05 pm
ICN
-
SEA
10h 30mnonstop
Multiple Airlines Logo
10:30 am - 6:45 pm
SEA
-
ICN
16h 15m
1 stop
$884Multiple Airlines
Mon, Jun 22 - Mon, Aug 31
Multiple Airlines Logo
7:35 pm - 2:05 pm
ICN
-
SEA
10h 30mnonstop
Multiple Airlines Logo
7:00 am - 6:45 pm
SEA
-
ICN
19h 45m
1 stop
$885Multiple Airlines
Mon, Jun 22 - Sat, Aug 29
Asiana Airlines Logo
9:00 pm - 1:55 pm
ICN
-
SEA
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 5:20 am
SEA
-
ICN
12h 10mnonstop
$914Asiana Airlines
Mon, Nov 2 - Sun, Nov 29
Asiana Airlines Logo
9:20 pm - 3:15 pm
ICN
-
SEA
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 4:30 am
SEA
-
ICN
12h 20mnonstop
$917Asiana Airlines
Tue, Oct 6 - Mon, Oct 12
United Airlines Logo
11:30 am - 4:20 pm
ICN
-
SEA
20h 50m
1 stop
United Airlines Logo
7:11 am - 3:00 pm
SEA
-
ICN
15h 49m
1 stop
$931United Airlines
Wed, Jun 24 - Thu, Sep 17
Air Canada Logo
6:55 pm - 6:22 pm
ICN
-
SEA
16h 27m
1 stop
Air Canada Logo
8:40 am - 5:10 pm
SEA
-
ICN
15h 30m
1 stop
$941Air Canada
Mon, Nov 2 - Mon, Nov 30
Alaska Airlines Logo
7:35 pm - 11:35 pm
ICN
-
GEG
44h 00m
2 stops
Alaska Airlines Logo
2:51 pm - 5:30 pm
GEG
-
ICN
58h 39m
2 stops
$1,071Alaska Airlines
Thu, Oct 15 - Mon, Oct 19
Alaska Airlines Logo
7:35 pm - 11:35 pm
ICN
-
GEG
44h 00m
2 stops
Alaska Airlines Logo
2:51 pm - 5:30 pm
GEG
-
ICN
58h 39m
2 stops
$1,074Alaska Airlines
Thu, Oct 15 - Mon, Oct 19
United Airlines Logo
4:50 pm - 10:28 am
ICN
-
GEG
33h 38m
1 stop
United Airlines Logo
6:00 am - 3:00 pm
GEG
-
ICN
17h 00m
1 stop
$1,262United Airlines
Thu, Oct 15 - Mon, Oct 19

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United Airlines flights from Incheon Intl Airport to State of Washington

Our best United Airlines deals on Incheon Intl Airport to State of Washington flight tickets
United Airlines
Jun 24
ICN11:30 amIncheon Intl
20h 50m
1 stop
SEA4:20 pmSeattle/Tacoma Intl
Sep 17
SEA7:11 amSeattle/Tacoma Intl
15h 49m
1 stop
ICN3:00 pmIncheon Intl
$931
United Airlines
Jun 24
ICN11:30 amIncheon Intl
23h 48m
2 stops
SEA7:18 pmSeattle/Tacoma Intl
Sep 17
SEA7:11 amSeattle/Tacoma Intl
29h 09m
1 stop
ICN4:20 amIncheon Intl
$947
United Airlines
Jun 24
ICN11:30 amIncheon Intl
17h 04m
1 stop
SEA12:34 pmSeattle/Tacoma Intl
Sep 17
SEA7:11 amSeattle/Tacoma Intl
15h 49m
1 stop
ICN3:00 pmIncheon Intl
$953

Asiana Airlines flights from Incheon Intl Airport to State of Washington

Our best Asiana Airlines deals on Incheon Intl Airport to State of Washington flight tickets
Asiana Airlines
Nov 2
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
Nov 29
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
$914
Asiana Airlines
Oct 6
ICN9:20 pmIncheon Intl
9h 55m
SEA3:15 pmSeattle/Tacoma Intl
Oct 12
SEA12:10 amSeattle/Tacoma Intl
12h 20m
ICN4:30 amIncheon Intl
$917
Asiana Airlines
Sep 17
ICN9:20 pmIncheon Intl
9h 55m
SEA3:15 pmSeattle/Tacoma Intl
Sep 22
SEA12:10 amSeattle/Tacoma Intl
12h 20m
ICN4:30 amIncheon Intl
$925

momondo Fare Finder

 
Customize your flight search to find flights from Incheon Intl Airport to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 12, 2026.
Use the filters below to find and compare flights from Incheon Intl Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/24

7:35 pm-2:05 pm

Nonstop10h 30m

Seattle/Tacoma Intl

Mon 8/31

10:30 am-6:45 pm

1 stop16h 15m

$863

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 6/22

7:35 pm-2:05 pm

Nonstop10h 30m

Seattle/Tacoma Intl

Mon 8/31

10:30 am-6:45 pm

1 stop16h 15m

$884

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 6/22

7:35 pm-2:05 pm

Nonstop10h 30m

Seattle/Tacoma Intl

Sat 8/29

7:00 am-6:45 pm

1 stop19h 45m

$885
Quickest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 11/2

9:00 pm-1:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Sun 11/29

12:10 am-5:20 am

Nonstop12h 10m

$914

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 10/6

9:20 pm-3:15 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 10/12

12:10 am-4:30 am

Nonstop12h 20m

$917

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/24

11:30 am-4:20 pm

1 stop20h 50m

Seattle/Tacoma Intl

Thu 9/17

7:11 am-3:00 pm

1 stop15h 49m

$931

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 11/2

6:55 pm-6:22 pm

1 stop16h 27m

Seattle/Tacoma Intl

Mon 11/30

8:40 am-5:10 pm

1 stop15h 30m

$941

IncheonSpokane

ICN - GEG

ICNGEG

Incheon Intl

Thu 10/15

7:35 pm-11:35 pm

2 stops44h 00m

Spokane

Mon 10/19

2:51 pm-5:30 pm

2 stops58h 39m

$1,071

IncheonSpokane

ICN - GEG

ICNGEG

Incheon Intl

Thu 10/15

7:35 pm-11:35 pm

2 stops44h 00m

Spokane

Mon 10/19

2:51 pm-5:30 pm

2 stops58h 39m

$1,074

IncheonSpokane

ICN - GEG

ICNGEG

Incheon Intl

Thu 10/15

4:50 pm-10:28 am

1 stop33h 38m

Spokane

Mon 10/19

6:00 am-3:00 pm

1 stop17h 00m

$1,262

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from Incheon Intl Airport to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

The month of November is, on average, the cheapest month to fly to State of Washington from Incheon Intl Airport, with most prices found around $329. If you aren’t able to travel to State of Washington during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $330.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Incheon Intl Airport to State of Washington is on a Monday. Travelers who choose to depart for State of Washington on a Monday will often find tickets for as low as $708. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Incheon Intl Airport to State of Washington for around $919.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $757. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $765 on average. Flights to State of Washington from Incheon Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Incheon Intl to Washington flight route?

Fly from Incheon Intl to Seattle/Tacoma Intl for the best Incheon Intl - Washington flight prices

How far in advance should I book a flight from Incheon Intl Airport to Washington?

You are more likely to see cheaper flights to State of Washington from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $744 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Incheon Intl Airport for as low as $585 on momondo.

What cabin class options are available on Incheon Intl Airport to State of Washington flights?

There are 4 cabin classes available to choose from on Incheon Intl Airport to State of Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Incheon Intl Airport to State of Washington flights?

You could potentially save up to 1% on your flight if you consider stops on a Incheon Intl Airport to State of Washington flight.

Cheap Incheon Intl Airport to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Incheon Intl Airport to State of Washington

Best Price Found

$624

Fastest flight time

9h 50m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in State of Washington

96 airports
The best one-way flight to State of Washington from Incheon Intl Airport in the past 72 hours is $624. The best round-trip flight deal from Incheon Intl Airport to State of Washington found on momondo in the last 72 hours is $1,101.
The fastest flight from Incheon Intl Airport to State of Washington takes 9h 50m
Direct flights go from Incheon Intl Airport to State of Washington on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There are 96 airports in State of Washington. From Incheon Intl Airport there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Incheon Intl Airport to Washington

  • When did momondo last update prices for flights from Incheon Intl Airport to Washington?

    Prices for flights from Incheon Intl Airport to Washington are refreshed on a daily basis.

  • How many operators does momondo search for flights from Incheon Intl Airport to Washington?

  • How old do you have to be to fly from Incheon Intl Airport to Washington?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Incheon Intl Airport to Washington.

  • What documentation or ID do you need to fly to Washington?

    The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Incheon Intl Airport to State of Washington?

Best airlines flying from Incheon Intl Airport to State of Washington

Compare and see reviews for airlines that fly from Incheon Intl Airport to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $351Free CancellationRating
7.8
2,829 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $472Free CancellationRating
7.1
11,172 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom $476Free CancellationRating
7.9
12,499 reviews
Search Alaska Airlines flights
DeltaPriceFrom $484Free CancellationRating
7.9
8,404 reviews
Search Delta flights
Korean AirPriceFrom $484Free CancellationRating
8.4
1,218 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $512Free CancellationRating
8.1
541 reviews
Search Asiana Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to Washington?

Finding the right flight to Washington from Seoul is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington quick and easy, saving you time and money.

Can I find flights from Seoul to Washington with flexible booking policies on momondo?

Yes. All flights to Washington from Seoul on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seoul to Washington?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seoul to Washington.

I’m not ready to book a flight from Seoul to Washington right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seoul to Washington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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