Seoul

$357+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SEL
Oct 11 — Oct 181
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Seoul are usually found in November or February, booked 27 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

Cheap 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 September 11, 2025.

Round-trip from

$784
(Mytrip)

One-way from

$357
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$1,664

Good round-trip deal

$1,102 or less

Good one-way deal

$548 or less
From Washington, D.C. Dulles Intl to Seoul (SEL)
One-way flight from Washington, D.C. Dulles Intl to Seoul (SEL)
Highest demand for flights based on searches. 20% potential increase in price ($375 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($41 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Seoul (SEL).
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Seoul (SEL).

Find 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 September 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:35 amIAD - ICN
1 stop17h 40mAir Canada
Wed 10/225:45 pmICN - IAD
2 stops28h 53mAir Canada
Deal found 9/11$749
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/215:22 pmIAD - ICN
2 stops33h 43mAir Canada
Wed 9/247:05 pmICN - IAD
2 stops29h 08mAir Canada
Deal found 9/10$784
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:35 amIAD - ICN
1 stop17h 40mAir Canada
Sat 10/115:45 pmICN - IAD
2 stops28h 53mAir Canada
Deal found 9/11$866
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/245:50 pmIAD - ICN
2 stops33h 20mAir Canada
Wed 12/36:55 pmICN - IAD
2 stops30h 28mAir Canada
Deal found 9/10$880
This Gotogate deal was found by Cheapflights users on 9/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/145:22 pmIAD - ICN
2 stops33h 43mAir Canada
Sun 9/216:00 pmICN - IAD
2 stops28h 38mAir Canada
Deal found 9/10$900
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:02 pmIAD - ICN
2 stops44h 18mMultiple Airlines
Sun 11/28:35 pmICN - IAD
1 stop23h 48mMultiple Airlines
Deal found 9/11$908
This Ovago deal was found by Cheapflights users on 9/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/410:00 pmIAD - GMP
1 stop25h 05mAir China
Thu 11/132:25 pmGMP - IAD
2 stops30h 23mAir China
Deal found 9/9$1,374
This Mytrip deal was found by Cheapflights users on 9/9. 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 9/2310:20 pmIAD - GMP
3 stops32h 30mMultiple Airlines
Fri 9/2612:05 pmGMP - IAD
2 stops34h 33mMultiple Airlines
Deal found 9/9$1,385
This Ovago deal was found by Cheapflights users on 9/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:00 pmIAD - GMP
1 stop25h 05mAir China
Tue 12/22:25 pmGMP - IAD
2 stops43h 01mAir China
Deal found 9/10$1,402
This oojo deal was found by Cheapflights users on 9/9. 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 11/410:00 pmIAD - GMP
1 stop25h 05mAir China
Tue 11/188:35 amGMP - IAD
1 stop23h 55mAir China
Deal found 9/9$1,478
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:00 pmIAD - GMP
1 stop25h 05mAir China
Fri 10/172:25 pmGMP - IAD
2 stops29h 44mAir China
Deal found 9/10$1,492
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:25 amIAD - GMP
2 stops47h 10mMultiple Airlines
Wed 11/512:25 pmGMP - IAD
2 stops31h 58mMultiple Airlines
Deal found 9/10$1,561

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 September 11, 2025.
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 9/25

9:35 am-4:15 pm

1 stop17h 40m

Incheon Intl

Wed 10/22

6:00 pm-4:18 pm

1 stop35h 18m

$756

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Mon 9/22

5:22 pm-4:05 pm

2 stops33h 43m

Incheon Intl

Sat 11/22

6:55 pm-11:23 am

2 stops30h 28m

$935

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Mon 10/20

1:30 pm-5:40 pm

1 stop39h 10m

Incheon Intl

Mon 11/3

10:45 am-11:45 am

1 stop39h 00m

$1,066

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Wed 10/22

9:40 pm-5:40 pm

1 stop31h 00m

Incheon Intl

Sat 11/8

10:45 am-11:45 am

1 stop39h 00m

$1,085

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Sun 3/1

6:55 pm-11:20 am

2 stops26h 25m

Incheon Intl

Tue 3/31

12:35 pm-5:49 am

2 stops30h 14m

$1,088

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Wed 11/5

1:30 pm-9:05 am

1 stop29h 35m

Incheon Intl

Tue 11/25

12:10 am-11:45 am

1 stop25h 35m

$1,143

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Sun 12/7

9:10 pm-6:20 pm

1 stop31h 10m

Incheon Intl

Thu 12/18

12:10 am-11:45 am

1 stop25h 35m

$1,163

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Wed 10/22

5:37 pm-4:05 pm

2 stops33h 28m

Incheon Intl

Sat 11/8

6:55 pm-11:45 am

2 stops30h 50m

$1,169

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Sun 3/1

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Mon 3/30

6:20 pm-5:23 pm

2 stops36h 03m

$1,193

Washington, D.C.Incheon

IAD - ICN

IADICN

Washington, D.C. Dulles Intl

Mon 3/2

1:30 pm-9:05 am

1 stop29h 35m

Incheon Intl

Sun 3/29

11:20 pm-7:45 pm

1 stop33h 25m

$1,198

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 41 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to Seoul flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Seoul trip
Airports
IAD

For a smooth departure from IAD, use the Aerotrain to quickly reach distant concourses, but allow extra time for security queues.

Read more about IADby Ramsey Qubein
ICN

Upon arrival at ICN, the AREX express train offers a quick 40-50 minute ride to Seoul Station, ideal for reaching the city efficiently.

Read more about ICNby Gabriel Leigh
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on ICN

Gabriel Leigh

Gabriel Leigh

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

Ramsey Qubein

Ramsey Qubein

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

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 August 29, 2025.

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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seoul (average of $990). Flying from Washington, D.C. Dulles Intl Airport to Seoul in December is currently the most expensive (average of $1,633). 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 September 11, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 36% on flights from Washington, D.C. Dulles Intl Airport to Seoul by exploring options for tickets in the evening.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Seoul?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Seoul. Price data was last updated on September 29, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Seoul flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 11, 2025.

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 83% 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 Istanbul (IST) offer the fastest connection on this route, with an average layover time of 2h 46m.

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 September 11, 2025.
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.

Entertainment

8.2

Crew

8.7

Boarding

8.5

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.

Entertainment

8.2

Crew

8.7

Boarding

8.5

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.
8.0
Very good

Entertainment

8.2

Crew

8.7

Boarding

8.5

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.

Entertainment

8.2

Crew

8.7

Boarding

8.5

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.

Entertainment

8.2

Crew

8.7

Boarding

8.5

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.

Entertainment

8.2

Crew

8.7

Boarding

8.5

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 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 17h 40m. The distance between Washington, D.C. Dulles Intl Airport and Seoul is about 6939 mi. 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. Dulles Intl Airport to Seoul round-trip?

    Flying on United Airlines is currently your cheapest option to Seoul, with prices starting at $367. Additional round-trip tickets that might be worth considering are offered by Air China and Asiana Airlines, with the lowest prices starting at $591 and $759, respectively. United Airlines is currently priced 74% below the average price you’ll pay for this route.

  • 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 $440. On average you can expect to pay $2,824. The most popular route, (Washington, D.C. Dulles Intl - Incheon Intl), can usually be booked for $959.

  • 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seoul (average of $990). Flying from Washington, D.C. Dulles Intl Airport to Seoul in December is currently the most expensive (average of $1,633). 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

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Top 8 airlines flying from Dulles Intl to Seoul

Discover the top 8 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$367Average$1,716FlexibilityNo cancel feeOn-time69%
Air ChinaCheapest$591Average$747FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$759Average$1,530FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$800Average$993FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$864Average$1,219FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$876Average$1,263FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,534Average$1,880FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,575Average$1,974FlexibilityNo cancel feeOn-timeN/A

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