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$565+ Cheap flights from Washington, D.C. (WAS) to Seoul (SEL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEL
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
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Find cheap flights from Washington, D.C. to Seoul with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Washington, D.C. to Seoul are usually found in February or January, booked 80 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap flight deals from Washington, D.C. to Seoul

Cheapest flights from Washington, D.C. to Seoul
Explore the most affordable flight options available from Washington, D.C. to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.

This FlightHub deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Wed 11/410:45 am
ICN
-
IAD
1 stop40h 00m
Turkish Airlines
Deal found 4/27$1,083
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Tue 11/1012:10 am
ICN
-
IAD
1 stop25h 35m
Turkish Airlines
Deal found 4/28$1,084
This Booking.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Tue 11/1712:10 am
ICN
-
IAD
1 stop25h 35m
Turkish Airlines
Deal found 4/26$1,099
This oojo deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Thu 12/1012:10 am
ICN
-
IAD
1 stop33h 05m
Turkish Airlines
Deal found 4/25$1,102
This FlightHub deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Wed 11/1812:10 am
ICN
-
IAD
1 stop25h 35m
Turkish Airlines
Deal found 4/27$1,107
This CrystalTravel deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:15 am
IAD
-
ICN
1 stop28h 30m
EVA Air
Wed 10/2112:00 pm
ICN
-
IAD
1 stop23h 00m
EVA Air
Deal found 4/24$1,112
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:30 pm
IAD
-
ICN
1 stop29h 35m
Turkish Airlines
Thu 11/1212:10 am
ICN
-
IAD
1 stop25h 35m
Turkish Airlines
Deal found 4/28$1,116
This Justfly.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Wed 12/210:45 am
ICN
-
IAD
1 stop39h 00m
Turkish Airlines
Deal found 4/27$1,120
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Mon 11/2310:45 am
ICN
-
IAD
1 stop46h 30m
Turkish Airlines
Deal found 4/28$1,121
This FlightHub deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Wed 11/412:10 am
ICN
-
IAD
1 stop26h 35m
Turkish Airlines
Deal found 4/27$1,124
This oojo deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:30 pm
IAD
-
ICN
1 stop38h 50m
Turkish Airlines
Tue 11/1712:10 am
ICN
-
IAD
1 stop25h 35m
Turkish Airlines
Deal found 4/24$1,126
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/21:15 am
IAD
-
GMP
1 stop22h 35m
EVA Air
Tue 11/37:00 pm
GMP
-
IAD
1 stop39h 55m
EVA Air
Deal found 4/28$1,139

Find flight deals from Washington, D.C. to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Seoul (SEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,129
(FlightHub)

One-way from

$565
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,456

Good round-trip deal

$1,112 or less

Good one-way deal

$559 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Seoul (SEL) flights.
Search Deals
From Washington, D.C. (WAS) to Seoul (SEL)
Search Deals
One-way flight from Washington, D.C. (WAS) to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Seoul (SEL).
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to Seoul (SEL).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Seoul 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, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Tue 7/14

6:59 pm-4:20 am

1 stop20h 21m

Incheon Intl

Tue 9/8

11:30 am-5:50 pm

1 stop19h 20m

$1,456

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Fri 5/1

6:00 am-10:40 am

2 stops39h 40m

Seoul Gimpo Intl

Fri 5/8

7:15 pm-4:45 pm

2 stops34h 30m

$1,517

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Sat 5/2

7:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Sat 5/9

8:00 am-12:09 am

2 stops29h 09m

$1,546

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 7/22

6:59 pm-4:20 am

1 stop20h 21m

Incheon Intl

Tue 8/4

11:30 am-7:10 am

1 stop32h 40m

$1,675

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Mon 7/6

6:59 pm-3:00 pm

1 stop31h 01m

Incheon Intl

Mon 7/20

11:30 am-7:10 am

1 stop32h 40m

$1,688
Quickest round-trip

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Tue 9/1

1:15 pm-5:40 pm

Nonstop15h 25m

Incheon Intl

Wed 9/16

10:25 am-11:05 am

Nonstop13h 40m

$1,802

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Tue 10/13

7:05 am-4:40 pm

1 stop20h 35m

Incheon Intl

Tue 10/27

10:15 am-10:50 am

Nonstop13h 35m

$1,806

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Sun 7/19

7:24 pm-10:40 am

2 stops26h 16m

Seoul Gimpo Intl

Wed 8/5

8:00 am-9:59 pm

2 stops26h 59m

$1,847

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 7/15

6:30 am-3:00 pm

1 stop19h 30m

Incheon Intl

Wed 7/22

11:30 am-5:57 pm

1 stop19h 27m

$1,856

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Sat 5/2

5:33 pm-2:10 pm

1 stop31h 37m

Incheon Intl

Fri 5/8

10:15 am-4:38 pm

1 stop19h 23m

$1,859

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Washington, D.C. to Seoul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Seoul in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Seoul flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Seoul flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Seoul

How far ahead should I book a flight from Washington, D.C. to Seoul?

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Seoul, you should look to book at least 53 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 Washington, D.C. to Seoul?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Seoul (average of $197). Flying from Washington, D.C. to Seoul in May is currently the most expensive (average of $3,319). 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 WAS to SEL?

Find hourly flight availability from Washington, D.C. to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2026.

When flying from Washington, D.C. to Seoul, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Washington, D.C. to Seoul

Explore weekly flight availability from Washington, D.C. to Seoul. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 29, 2026.

The most flights from WAS to SEL are scheduled on a Monday (3 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Washington, D.C. to Seoul?

What’s the top layover airport for flights from Washington, D.C. to Seoul?

Share of 1-stop round-trip flights from Washington, D.C. to Seoul chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 57% of 1-stop itineraries from Washington, D.C. to Seoul on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. to Seoul?

Average round-trip fare for 1-stop flights from Washington, D.C. to Seoul, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Istanbul (IST) is the most affordable 1-stop option, with an average round-trip price of $1,031.

What’s the fastest layover option from Washington, D.C. to Seoul?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. to Seoul, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 17h 30m.

Which airport typically offers the quickest layover for flights from Washington, D.C. to Seoul?

Average layover duration for 1-stop one-way flights from Washington, D.C. to Seoul, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 17m.

The best insider tips for Washington, D.C. to Seoul flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to Seoul trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on ICN

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seoul. Reviews last updated April 29, 2026.
See what other customers who have flown with Korean Air,AIR PREMIA, andDelta from Washington, D.C. to Seoul have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,214 reviews
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
AIR PREMIA
8.1
Very good
89 reviews
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
7.9
Good
8,467 reviews
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
9,680 reviews
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
10,979 reviews
Korean Air
8.4
Very good
1,214 reviews

Crew

8.7

Boarding

8.5

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. to Seoul?

    United Airlines, Japan Airlines, and Delta can get you from Washington, D.C. to Seoul in just under 15h 25m. Your travel time can differ by up to 24h 15m. There are 6939 mi between Washington, D.C. and Seoul. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to Seoul round-trip?

    United Airlines, at $317, was found to be the cheapest airline from Washington, D.C. to Seoul.Alternate airlines to your destination round-trip include Delta and AIR PREMIA. United Airlines is currently priced 79% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. to Seoul one-way?

    One-way options have recently been found by users for as low as $488 on Turkish Airlines. Other airlines that offer cheap prices include AIR PREMIA from $518 and Air Canada from $575 one-way.

  • What are the most popular routes from Washington, D.C. to Seoul?

    When deciding which route to take from Washington, D.C. to Seoul consider Washington, D.C. Dulles Intl - Incheon Intl, Washington, D.C. Reagan-National - Incheon Intl or Baltimore/Washington - Incheon Intl as they are the most popular.

  • What are the cheapest flights from Washington, D.C. to Seoul?

    Looking at all options, your cheapest flight can be booked for $462. While the most popular route (Washington, D.C. Dulles Intl - Incheon Intl) can be booked for $1,065 on average, our data indicates $2,560 when flying from Washington, D.C. to Seoul.

  • Can I find deals for flights from Washington, D.C. to Seoul that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Seoul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Seoul.

  • Can I find deals for business class flights from Washington, D.C. to Seoul?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Seoul 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 Washington, D.C. to Seoul?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Seoul (average of $197). Flying from Washington, D.C. to Seoul in May is currently the most expensive (average of $3,319). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Incheon Intl flights
Reagan-National to Incheon Intl flights

Top 8 airlines flying from Washington, D.C. to Seoul

Discover the top 8 airlines that operate flights from Washington, D.C. to Seoul. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$317Average$1,476FlexibilityNo cancel feeOn-time69%
DeltaCheapest$392Average$1,564FlexibilityNo cancel feeOn-timeN/A
AIR PREMIACheapest$590Average$1,270FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$685Average$1,302FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$716Average$1,248FlexibilityNo cancel feeOn-time71%
Air ChinaCheapest$729Average$915FlexibilityNo cancel feeOn-time67%
Turkish AirlinesCheapest$902Average$1,108FlexibilityNo cancel feeOn-time77%
Korean AirCheapest$1,385Average$1,687FlexibilityNo cancel feeOn-time81%

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