How does KAYAK find such low prices on flights from Washington to Seoul Incheon Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Seoul Incheon Airport. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Seoul Incheon Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul Incheon Airport from Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington to Seoul Incheon Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seoul Incheon Airport with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Seoul Incheon Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seoul Incheon Airport from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$362 CHEAP FLIGHTS from Washington to Seoul Incheon (ICN)

ICN

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Cheap Flights from Washington to Incheon Intl

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Washington to Incheon Intl

Sun, Aug 30 - Sun, Sep 13

10:30 am - 6:45 pm

SEA

ICN

16h 15m

1 stop

8:45 pm - 6:45 pm

ICN

SEA

14h 00m

1 stop

$887WestJet

Sat, Aug 22 - Wed, Sep 16

12:25 pm - 12:25 am

SEA

ICN

20h 00m

1 stop

8:00 am - 10:05 am

ICN

SEA

18h 05m

1 stop

$888Cathay Pacific

Mon, Jul 27 - Thu, Aug 20

12:10 am - 4:00 am

SEA

ICN

11h 50mnonstop

9:20 pm - 3:45 pm

ICN

SEA

10h 25mnonstop

$890Asiana Airlines

Mon, Jul 27 - Tue, Aug 25

12:10 am - 4:00 am

SEA

ICN

11h 50mnonstop

9:20 pm - 3:45 pm

ICN

SEA

10h 25mnonstop

$893Asiana Airlines

Tue, Sep 8 - Tue, Nov 10

6:30 am - 11:55 am

GEG

ICN

37h 25m

2 stops

12:55 pm - 9:37 pm

ICN

GEG

49h 42m

2 stops

$990China Eastern

Tue, Sep 8 - Tue, Nov 10

6:30 am - 11:55 am

GEG

ICN

37h 25m

2 stops

8:55 am - 9:37 pm

ICN

GEG

29h 42m

2 stops

$992China Eastern

Wed, Sep 2 - Sat, Sep 12

10:37 am - 9:40 pm

PDX

ICN

19h 03m

1 stop

6:00 pm - 4:50 pm

ICN

PDX

14h 50m

1 stop

$1,009Multiple Airlines

Wed, Sep 2 - Fri, Sep 11

5:07 am - 10:30 am

PDX

ICN

37h 23m

2 stops

1:20 am - 10:01 pm

ICN

PDX

36h 41m

2 stops

$1,031Multiple Airlines

Tue, Sep 22 - Mon, Oct 19

11:57 am - 5:05 pm

PUW

ICN

37h 08m

2 stops

1:20 am - 11:56 pm

ICN

PUW

38h 36m

2 stops

$1,061Qatar Airways

Tue, Sep 22 - Tue, Oct 20

11:57 am - 5:05 pm

PUW

ICN

37h 08m

2 stops

1:20 am - 11:56 pm

ICN

PUW

38h 36m

2 stops

$1,063Qatar Airways

Useful Info

Low season	January
High season	April
Cheapest flight	$362

Best time to beat the crowds with an average 7% drop in price.

Most popular time to fly and prices are also 13% lower on average.

Flight from Seattle to Seoul Incheon Airport

AngelitaFlew with Korean Air

SEA

ICN

Mar 2026

Get an earliest flight as possible because of less traffic

AvikFlew with Delta

SEA

ICN

Dec 2025

Pack food I guess , especially if traveling with little Kids

lizFlew with Asiana Airlines

SEA

ICN

May 2024

Do try to snooze on long haul flights, bring a good book to read, choose an aisle seat.

How does KAYAK find such low prices on flights from Washington to Seoul Incheon Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Seoul Incheon Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Seoul Incheon Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul Incheon Airport from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Seoul Incheon Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seoul Incheon Airport with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Seoul Incheon Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seoul Incheon Airport from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Seongnam

Suwon

Anyang

Everything you need to know for your flight to Incheon Intl

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Cabin class

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Seoul Incheon Airport (ICN)

ICN

$362 Find Cheap Flights from Washington to Seoul Incheon Airport

KAYAK searches hundreds of travel sites at once for deals on flights to Incheon Intl Airport

Cheap Flights from Washington to Incheon Intl

Recent round-trip flight deals from Washington to Incheon Intl

Recent one-way flight deals from Washington to Incheon Intl

Recent last minute flight deals from Washington to Incheon Intl

Recent direct flight deals from Washington to Incheon Intl

Good to know

Flights from Washington to Incheon Intl: the best tips from KAYAK users

FAQs for booking Washington to Seoul Incheon Airport flights

Traveling to a place near Incheon Intl?

Everything you need to know for your flight to Incheon Intl

Information on your arrival and departure airports

Cabin class types available on flights to Incheon Intl

Complete your trip to Incheon Intl with a hotel stay or car rental

Find direct flights for Incheon Intl

Flights to other popular destinations

Flights from domestic origins to Washington

Choose which airport to fly into in Incheon

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