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$420+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEL
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. to Seoul are usually found in March or January, booked 19 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

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 February 3, 2026.

This Gotogate deal was found by Cheapflights users on 1/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:00 pm
IAD
-
ICN
1 stop26h 15m
Multiple Airlines
Mon 4/135:45 pm
ICN
-
IAD
2 stops39h 44m
Multiple Airlines
Deal found 1/31$859
This CrystalTravel deal was found by Cheapflights users on 2/2. 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.
Fri 3/610:00 pm
IAD
-
ICN
1 stop23h 40m
Air China
Fri 3/1311:10 am
ICN
-
IAD
1 stop21h 20m
Air China
Deal found 2/2$863
This oojo deal was found by Cheapflights users on 2/1. 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.
Tue 3/1011:00 pm
IAD
-
ICN
1 stop28h 35m
Air China
Fri 3/201:10 pm
ICN
-
IAD
1 stop19h 20m
Air China
Deal found 2/1$872
This oojo deal was found by Cheapflights users on 2/1. 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.
Tue 3/1011:00 pm
IAD
-
ICN
1 stop23h 40m
Air China
Tue 3/3110:50 am
ICN
-
IAD
1 stop21h 40m
Air China
Deal found 2/1$873
This Gotogate deal was found by Cheapflights users on 2/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1311:00 pm
IAD
-
ICN
1 stop25h 55m
Air China
Mon 3/233:05 pm
ICN
-
IAD
1 stop41h 25m
Air China
Deal found 2/1$878
This Booking.com deal was found by Cheapflights users on 2/1. 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.
Fri 4/2411:00 pm
IAD
-
ICN
1 stop28h 35m
Multiple Airlines
Mon 5/255:45 pm
ICN
-
IAD
1 stop25h 37m
Multiple Airlines
Deal found 2/1$879
This Gotogate deal was found by Cheapflights users on 2/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1011:00 pm
IAD
-
ICN
1 stop26h 15m
Air China
Mon 4/203:30 pm
ICN
-
IAD
1 stop41h 00m
Air China
Deal found 2/2$882
This Gotogate deal was found by Cheapflights users on 2/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/610:00 pm
IAD
-
ICN
1 stop25h 20m
Air China
Mon 3/163:05 pm
ICN
-
IAD
1 stop41h 25m
Air China
Deal found 2/2$883
This Gotogate deal was found by Cheapflights users on 1/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:00 pm
IAD
-
ICN
1 stop34h 00m
Air China
Mon 4/133:30 pm
ICN
-
IAD
1 stop41h 00m
Air China
Deal found 1/31$888
This Mytrip deal was found by Cheapflights users on 2/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:00 pm
IAD
-
ICN
1 stop28h 35m
Multiple Airlines
Tue 4/285:45 pm
ICN
-
IAD
2 stops31h 05m
Multiple Airlines
Deal found 2/1$890
This China Airlines deal was found by Cheapflights users on 2/2. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:11 pm
BWI
-
ICN
2 stops27h 19m
Multiple Airlines
Mon 5/1112:45 pm
ICN
-
BWI
2 stops29h 59m
Multiple Airlines
Deal found 2/2$1,016
This China Airlines deal was found by Cheapflights users on 2/3. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:16 pm
BWI
-
ICN
2 stops27h 14m
Multiple Airlines
Mon 5/118:05 pm
ICN
-
BWI
2 stops22h 39m
Multiple Airlines
Deal found 2/3$1,054

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$859
(Gotogate)

One-way from

$420
(CrystalTravel)

Popular in

December

Cheapest in

March

Average price

$1,219

Good round-trip deal

$1,164 or less

Good one-way deal

$548 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. 6% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 3, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Seoul that are best for you.

Fly from

Washington, D.C.

Fly to

Seoul

Route

Depart

Return

Price

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 3/18

4:03 pm-4:40 am

2 stops23h 37m

Incheon Intl

Wed 3/25

11:45 am-10:30 pm

2 stops23h 45m

$1,105

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Thu 4/30

7:20 pm-11:30 am

2 stops27h 10m

Incheon Intl

Mon 6/15

8:05 pm-7:32 am

2 stops24h 27m

$1,115

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 3/4

6:00 am-3:50 pm

1 stop19h 50m

Incheon Intl

Wed 3/11

7:25 pm-12:53 am

1 stop18h 28m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Tue 3/3

8:42 am-5:40 am

1 stop30h 58m

Incheon Intl

Wed 3/11

5:00 pm-7:19 am

1 stop27h 19m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Mon 2/16

6:05 am-3:30 pm

1 stop19h 25m

Incheon Intl

Thu 2/26

7:30 pm-11:47 pm

1 stop18h 17m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Wed 4/29

12:40 pm-4:20 am

2 stops26h 40m

Incheon Intl

Thu 6/11

4:50 pm-7:10 am

1 stop27h 20m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Mon 2/16

6:05 am-3:30 pm

1 stop19h 25m

Incheon Intl

Tue 4/7

7:20 pm-5:51 am

1 stop23h 31m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Thu 4/30

6:05 am-3:00 pm

1 stop19h 55m

Incheon Intl

Mon 6/15

4:50 pm-7:10 am

1 stop27h 20m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Tue 3/17

6:17 am-3:30 pm

1 stop20h 13m

Incheon Intl

Tue 4/7

7:20 pm-5:51 am

1 stop23h 31m

$1,123

BaltimoreIncheon

BWI - ICN

BWIICN

Baltimore/Washington

Thu 4/30

6:08 am-5:20 pm

1 stop22h 12m

Incheon Intl

Fri 6/12

7:40 pm-11:44 pm

1 stop17h 04m

$1,123

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 60 results
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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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Seoul. Price data was last updated on January 30, 2026.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Seoul, you should look to book at least 19 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 $372). Flying from Washington, D.C. to Seoul in July is currently the most expensive (average of $1,091). 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 February 3, 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 February 3, 2026.

The most flights from WAS to SEL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, 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 44% 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 $939.

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 February 3, 2026.
See what other customers who have flown with Korean Air, Delta, and United Airlines 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
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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
1,188 reviews
Korean Air
8.4
Very good
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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
8,132 reviews
Korean Air
8.4
Very good
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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
9,231 reviews
Korean Air
8.4
Very good
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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.
American Airlines
7.2
Good
11,212 reviews
Korean Air
8.4
Very good
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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
10,676 reviews
Korean Air
8.4
Very good
1,188 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Comfort

8.3

Crew

8.7

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 Air Canada can get you from Washington, D.C. to Seoul in just under 19h 50m. Your travel time can differ by up to 3h 47m. 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 $356, was found to be the cheapest airline from Washington, D.C. to Seoul.Alternate airlines to your destination round-trip include United Airlines and Air China. Delta is currently priced 75% 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 $416 on Air China. Other airlines that offer cheap prices include Turkish Airlines from $488 and Air Canada from $605 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 Washington, D.C. Dulles Intl - Seoul Gimpo 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 $514. While the most popular route (Washington, D.C. Dulles Intl - Incheon Intl) can be booked for $852 on average, our data indicates $2,533 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 $372). Flying from Washington, D.C. to Seoul in July is currently the most expensive (average of $1,091). 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.

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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$356Average$1,597FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$367Average$1,492FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$591Average$756FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$716Average$1,237FlexibilityNo cancel feeOn-time71%
Asiana AirlinesCheapest$759Average$2,072FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$791Average$1,026FlexibilityNo cancel feeOn-time77%
AIR PREMIACheapest$864Average$1,536FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$972Average$1,437FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$1,059Average$1,708FlexibilityNo cancel feeOn-time81%

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