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$420+ Cheap flights from Dulles Intl (IAD) 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.
IAD — SEL
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Find cheap flights from Dulles Intl 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. Dulles Intl to Seoul are usually found in February or March, booked 27 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

Cheap flight deals from Dulles Intl to Seoul

Cheapest flights from Dulles Intl to Seoul
Explore the most affordable flight options available from Dulles Intl 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 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
-
GMP
1 stop25h 05m
Air China
Tue 3/178:40 am
GMP
-
IAD
1 stop23h 50m
Air China
Deal found 2/1$1,264
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1011:00 pm
IAD
-
GMP
1 stop25h 05m
Air China
Mon 4/203:00 pm
GMP
-
IAD
1 stop41h 30m
Air China
Deal found 2/2$1,265

Find flight deals from Dulles Intl to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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

June

Cheapest in

February

Average price

$1,019

Good round-trip deal

$1,164 or less

Good one-way deal

$548 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Seoul (SEL) flights.
Search Deals
From Washington, D.C. Dulles Intl to Seoul (SEL)
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($34 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. Dulles Intl to Seoul (SEL).
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Seoul (SEL).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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. Dulles Intl Airport to Seoul that are best for you.

Fly from

Dulles Intl

Fly to

Seoul

Route

Depart

Return

Price

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

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Fri 3/6

6:20 pm-6:35 pm

2 stops34h 15m

Incheon Intl

Mon 3/16

8:35 pm-5:27 pm

2 stops33h 52m

$1,315

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Thu 5/7

7:00 am-7:05 pm

2 stops47h 05m

Incheon Intl

Fri 5/15

3:10 pm-11:26 pm

2 stops45h 16m

$1,321

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Thu 3/19

5:52 pm-6:35 pm

2 stops35h 43m

Incheon Intl

Sat 4/18

8:05 pm-5:40 am

2 stops46h 35m

$1,325

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Tue 4/14

11:00 pm-1:05 pm

1 stop25h 05m

Seoul Gimpo Intl

Tue 4/28

7:40 am-8:29 pm

2 stops25h 49m

$1,358

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Fri 2/13

7:05 am-6:35 pm

1 stop21h 30m

Incheon Intl

Mon 5/11

7:35 pm-12:09 am

1 stop17h 34m

$1,433

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Wed 7/1

6:10 am-2:05 pm

2 stops42h 55m

Incheon Intl

Wed 7/22

10:10 am-11:06 am

2 stops37h 56m

$1,450

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Thu 4/23

5:55 pm-7:05 pm

2 stops36h 10m

Incheon Intl

Thu 5/7

1:55 am-11:28 pm

2 stops34h 33m

$1,480

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 4/6

12:15 pm-10:20 pm

1 stop21h 05m

Seoul Gimpo Intl

Mon 4/20

7:55 pm-10:05 am

1 stop27h 10m

$1,506

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Sat 4/11

12:15 pm-10:20 pm

1 stop21h 05m

Seoul Gimpo Intl

Tue 4/28

7:40 am-3:40 pm

1 stop21h 00m

$1,551

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 46 results
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Compare providers for flights from Dulles Intl 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 Dulles Intl to Seoul in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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. Dulles Intl Airport-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. Dulles Intl Airport-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-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. Dulles Intl Airport-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 Dulles Intl to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from Dulles Intl 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. Dulles Intl Airport to Seoul

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

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to Seoul is 26 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Seoul?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seoul (average of $372). Flying from Washington, D.C. Dulles Intl Airport to Seoul in July is currently the most expensive (average of $1,155). 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 IAD to SEL?

Find hourly flight availability from Dulles Intl 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.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Seoul as you normally would.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Seoul

Explore weekly flight availability from Dulles Intl 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 IAD 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).

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

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

Istanbul (IST) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Seoul on Cheapflights.

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

Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Seoul?

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

Flights via Istanbul (IST) have the shortest average one-way travel time for 1-stop routes: 21h 40m.

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

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

Flights via Beijing (PEK) offer the fastest connection on this route, with an average layover time of 3h 20m.

The best insider tips for Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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.
Get a feel of what it's like to fly with Korean Air, Delta, and Turkish Airlines from Washington, D.C. Dulles Intl Airport to Seoul by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,188 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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
8,135 reviews
Korean Air
8.4
Very good
1,188 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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.
Turkish Airlines
7.3
Good
4,210 reviews
Korean Air
8.4
Very good
1,188 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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
11,213 reviews
Korean Air
8.4
Very good
1,188 reviews

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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

Crew

8.7

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.4

Boarding

8.5

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 Dulles Intl 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. Dulles Intl Airport to Seoul?

    Departing from Washington, D.C. Dulles Intl Airport to Seoul will take you 21h 05m. The distance between Washington, D.C. Dulles Intl Airport and Seoul is about 6925 mi.

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

    Flying on Delta is currently your cheapest option to Seoul, with prices starting at $356. Additional round-trip tickets that might be worth considering are offered by United Airlines and Air China, with the lowest prices starting at $367 and $591, respectively. Delta is currently priced 77% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport 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 $670 one-way.

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

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Seoul is $514. On average you can expect to pay $2,533. The most popular route, (Washington, D.C. Dulles Intl - Incheon Intl), can usually be booked for $863.

  • Can I find deals for flights from Dulles Intl to Seoul that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Seoul?

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

  • Can I find deals for business class flights from Dulles Intl to Seoul?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Seoul?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seoul (average of $372). Flying from Washington, D.C. Dulles Intl Airport to Seoul in July is currently the most expensive (average of $1,155). 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 Dulles Intl to Seoul

Discover the top 9 airlines that operate flights from Dulles Intl 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$1,804FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$367Average$1,576FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$591Average$756FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$759Average$2,072FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$791Average$1,026FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$821Average$1,712FlexibilityNo cancel feeOn-time71%
AIR PREMIACheapest$864Average$1,536FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$972Average$1,554FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$1,553Average$1,907FlexibilityNo cancel feeOn-time81%

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