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$423+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEL
Aug 13 — Aug 201
Thu 8/13
Thu 8/20
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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Washington, D.C. to Seoul are usually found in January or September, 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 July 14, 2026.

This United Airlines deal was found by Cheapflights users on 7/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:35 pm
BWI
-
ICN
1 stop21h 05m
United Airlines
Thu 12/36:00 pm
ICN
-
BWI
1 stop25h 52m
United Airlines
Deal found 7/12$856
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:10 am
BWI
-
ICN
1 stop31h 30m
United Airlines
Thu 11/196:00 pm
ICN
-
BWI
1 stop25h 58m
United Airlines
Deal found 7/11$862
This United Airlines deal was found by Cheapflights users on 7/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:10 am
BWI
-
ICN
1 stop31h 30m
United Airlines
Wed 11/1812:45 pm
ICN
-
BWI
2 stops24h 12m
United Airlines
Deal found 7/12$866
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:10 am
BWI
-
ICN
1 stop31h 30m
United Airlines
Mon 11/2312:45 pm
ICN
-
BWI
1 stop31h 13m
United Airlines
Deal found 7/11$868
This KAYAK deal was found by Cheapflights users on 7/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:35 pm
BWI
-
ICN
1 stop21h 05m
Asiana Airlines
Mon 11/166:00 pm
ICN
-
BWI
1 stop25h 58m
Asiana Airlines
Deal found 7/11$905
This KAYAK deal was found by Cheapflights users on 7/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:00 am
BWI
-
ICN
1 stop31h 20m
Asiana Airlines
Tue 9/1511:30 am
ICN
-
BWI
1 stop19h 10m
Asiana Airlines
Deal found 7/10$911
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:52 pm
BWI
-
ICN
1 stop20h 28m
United Airlines
Tue 10/611:30 am
ICN
-
BWI
1 stop19h 09m
United Airlines
Deal found 7/10$981
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:18 pm
BWI
-
ICN
2 stops23h 02m
United Airlines
Thu 10/2211:30 am
ICN
-
BWI
1 stop19h 09m
United Airlines
Deal found 7/10$986
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:00 am
BWI
-
ICN
1 stop31h 20m
United Airlines
Wed 10/711:30 am
ICN
-
BWI
1 stop19h 09m
United Airlines
Deal found 7/10$987
This United Airlines deal was found by Cheapflights users on 7/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:00 am
BWI
-
ICN
1 stop31h 20m
United Airlines
Wed 11/1812:45 pm
ICN
-
BWI
1 stop18h 50m
United Airlines
Deal found 7/13$990
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:52 pm
BWI
-
ICN
1 stop31h 08m
United Airlines
Tue 10/204:50 pm
ICN
-
BWI
2 stops30h 49m
United Airlines
Deal found 7/10$991
This Qatar Airways deal was found by Cheapflights users on 7/13. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:00 pm
IAD
-
ICN
1 stop31h 05m
Qatar Airways
Tue 9/221:20 am
ICN
-
IAD
1 stop27h 20m
Qatar Airways
Deal found 7/13$1,094

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 July 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$856
(United Airlines)

One-way from

$423
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,603

Good round-trip deal

$1,111 or less

Good one-way deal

$585 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. 7% potential increase in price ($116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 14, 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

Wed 11/4

6:35 pm-5:40 am

1 stop21h 05m

Incheon Intl

Thu 11/12

6:00 pm-5:58 am

1 stop25h 58m

$856

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Tue 9/1

1:00 pm-4:20 am

2 stops26h 20m

Incheon Intl

Sat 9/12

11:30 am-5:40 pm

1 stop19h 10m

$1,036

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 11/4

6:10 am-5:40 am

2 stops33h 30m

Incheon Intl

Sun 11/22

12:45 pm-10:43 pm

2 stops23h 58m

$1,036

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 10/7

6:00 am-2:10 pm

1 stop19h 10m

Incheon Intl

Wed 10/21

10:15 am-11:04 pm

1 stop25h 49m

$1,106

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Tue 10/6

7:30 am-5:20 pm

1 stop20h 50m

Incheon Intl

Tue 10/20

4:25 pm-8:46 pm

1 stop17h 21m

$1,106

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Fri 10/16

7:30 am-5:20 pm

1 stop20h 50m

Incheon Intl

Sun 10/25

7:25 pm-12:26 am

1 stop18h 01m

$1,206

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Sat 9/19

2:03 pm-4:00 am

1 stop24h 57m

Incheon Intl

Sun 9/27

4:25 pm-11:26 pm

1 stop20h 01m

$1,206
Quickest round-trip

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Sat 9/12

6:00 am-2:10 pm

1 stop19h 10m

Incheon Intl

Sun 10/18

6:50 pm-12:26 am

1 stop18h 36m

$1,206

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Sat 9/19

8:00 am-4:20 am

1 stop31h 20m

Incheon Intl

Sun 9/27

11:30 am-10:34 pm

2 stops24h 04m

$1,220

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Mon 10/5

6:00 am-2:05 pm

2 stops43h 05m

Incheon Intl

Mon 10/19

1:40 pm-5:32 am

2 stops28h 52m

$1,224

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

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 July.
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

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 June is currently the most expensive (average of $2,083). 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 July 14, 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 July 14, 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 67% 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.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of $1,143.

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.

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.

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 July 14, 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
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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
1,222 reviews
Korean Air
8.4
Very good
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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
8.2
Very good
100 reviews
Korean Air
8.4
Very good
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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
7.8
Good
8,467 reviews
Korean Air
8.4
Very good
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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
9,989 reviews
Korean Air
8.4
Very good
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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
11,338 reviews
Korean Air
8.4
Very good
1,222 reviews

Entertainment

8.2

Boarding

8.5

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

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, Delta, and Philippine Airlines can get you from Washington, D.C. to Seoul in just under 19h 10m. Your travel time can differ by up to 17h 30m. There are 6938 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?

    Delta, at $397, was found to be the cheapest airline from Washington, D.C. to Seoul.Alternate airlines to your destination round-trip include Air Canada and AIR PREMIA. Delta is currently priced 73% 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 $492 and Air Canada from $738 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, Baltimore/Washington - Incheon Intl or Washington, D.C. Reagan-National - Incheon Intl as they are the most popular.

  • What are the most reliable airlines from Washington, D.C. to Seoul?

    Before booking your flight to Seoul from Washington, D.C., check out the most reliable airlines to get you to your destination on time: AIR PREMIA (93%), Delta (68%), Korean Air( 68%).

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

    Looking at all options, your cheapest flight can be booked for $486. While the most popular route (Washington, D.C. Dulles Intl - Incheon Intl) can be booked for $901 on average, our data indicates $2,714 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 June is currently the most expensive (average of $2,083). 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 9 airlines flying from Washington, D.C. to Seoul

Discover the top 9 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 July 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$397Average$1,555FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$441Average$1,226FlexibilityNo cancel feeOn-time67%
AIR PREMIACheapest$659Average$1,298FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$687Average$1,537FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$716Average$1,246FlexibilityNo cancel feeOn-time71%
Air ChinaCheapest$729Average$915FlexibilityNo cancel feeOn-time67%
EVA AirCheapest$875Average$1,266FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$929Average$1,109FlexibilityNo cancel feeOn-time77%
Korean AirCheapest$1,385Average$1,647FlexibilityNo cancel feeOn-time81%

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.