£497 Cheap Flights from Washington (IAD) to Seoul (ICN)

View £497 flight on Tue, 15 Sept 2026Opens in a new window

Flight 1

Popular airlines from Washington Dulles International Airport (IAD) to Incheon Intl. Airport (ICN)

Cheap Flights from Washington (IAD) to Seoul (ICN)

Prices were available within the past 7 days and start at £497 for one-way flights and £881 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Tue, 8 Sept - Wed, 23 Sept
IAD
Washington
ICN
Seoul
£881 Return, found 2 days ago
£881
Return
found 2 days ago
Select EVA Airways flight, departing Tue, 8 Sept from Washington to Seoul, returning Wed, 23 Sept, priced at £881 found 2 days ago
American Airlines
Tue, 8 Sept - Wed, 23 Sept
IAD
Washington
ICN
Seoul
£1,060 Return, found 2 days ago
£1,060
Return
found 2 days ago
Select American Airlines flight, departing Tue, 8 Sept from Washington to Seoul, returning Wed, 23 Sept, priced at £1,060 found 2 days ago
Air Canada
Tue, 12 May - Mon, 8 Jun
IAD
Washington
ICN
Seoul
£1,135 Return, found 12 hours ago
£1,135
Return
found 12 hours ago
Select Air Canada flight, departing Tue, 12 May from Washington to Seoul, returning Mon, 8 Jun, priced at £1,135 found 12 hours ago
Air Canada
Tue, 12 May - Mon, 8 Jun
IAD
Washington
ICN
Seoul
£1,194 Return, found 12 hours ago
£1,194
Return
found 12 hours ago
Select Air Canada flight, departing Tue, 12 May from Washington to Seoul, returning Mon, 8 Jun, priced at £1,194 found 12 hours ago
WestJet
Fri, 15 May - Fri, 22 May
IAD
Washington
ICN
Seoul
£1,196 Return, found 6 days ago
£1,196
Return
found 6 days ago
Select WestJet flight, departing Fri, 15 May from Washington to Seoul, returning Fri, 22 May, priced at £1,196 found 6 days ago
Air Canada
Tue, 12 May - Mon, 8 Jun
IAD
Washington
ICN
Seoul
£1,207 Return, found 12 hours ago
£1,207
Return
found 12 hours ago
Select Air Canada flight, departing Tue, 12 May from Washington to Seoul, returning Mon, 8 Jun, priced at £1,207 found 12 hours ago
Etihad Airways
Fri, 14 Aug - Thu, 20 Aug
IAD
Washington
ICN
Seoul
£1,209 Return, found 4 days ago
£1,209
Return
found 4 days ago
Select Etihad Airways flight, departing Fri, 14 Aug from Washington to Seoul, returning Thu, 20 Aug, priced at £1,209 found 4 days ago
Air Canada
Tue, 12 May - Mon, 8 Jun
IAD
Washington
ICN
Seoul
£1,243 Return, found 12 hours ago
£1,243
Return
found 12 hours ago
Select Air Canada flight, departing Tue, 12 May from Washington to Seoul, returning Mon, 8 Jun, priced at £1,243 found 12 hours ago
Etihad Airways
Fri, 14 Aug - Thu, 20 Aug
IAD
Washington
ICN
Seoul
£1,253 Return, found 4 days ago
£1,253
Return
found 4 days ago
Select Etihad Airways flight, departing Fri, 14 Aug from Washington to Seoul, returning Thu, 20 Aug, priced at £1,253 found 4 days ago
Alaska Airlines
Sun, 19 Jul - Thu, 23 Jul
IAD
Washington
ICN
Seoul
£1,261 Return, found 5 hours ago
£1,261
Return
found 5 hours ago
Select Alaska Airlines flight, departing Sun, 19 Jul from Washington to Seoul, returning Thu, 23 Jul, priced at £1,261 found 5 hours ago

Find the cheapest month to fly from Washington (IAD) to Seoul (ICN)

September is typically the cheapest month to fly

From £696 - £1,084 per traveller.

Frequently asked questions

What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
February is typically the cheapest month to fly from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN), with average return fares of approximately £1905. This is about 19% lower than the average price throughout the year. February often sees lower prices as it falls outside of peak holiday seasons, leading to reduced demand. Other cheap months to fly from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN) include March and September.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
Enter IAD to ICN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
The best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) will differ from traveller to traveller. If you like to fly early, KE offers early morning flights. If price is the most important factor, YP typically offers the lowest fares. UA offers the most daily flights from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
The cheapest time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) is typically in February or March, with average return flights costing around £1905. This information is based on booking data from the past year. While these months offer the lowest fares, it's always a good idea to check specific dates as prices can fluctuate.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
When flying from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.), you'll find approximately 2 nonstop flights per day. For even more choice, look at flights that include layovers, as there are around 117 connecting flights daily. Some common connection points include Pearson Intl. (YYZ), Hartsfield-Jackson Atlanta Intl. (ATL), and San Francisco Intl. (SFO).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
The earliest flight from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN) typically departs at approximately 1:15 AM local time, operated by BR. This is a seasonal service active in September and October. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
You'll find the most flights from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN) on a Monday, with around 69 flights available. This gives you plenty of options for your travel plans. Flight options are fairly consistent throughout the week, with Monday offering only slightly more flights than other days. Major airlines on this route include United Airlines, Delta Air Lines, and Air France.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN) are in the morning, from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including Delta Air Lines, Korean Air and United Airlines, offer flights during this window. These times work well because you can get an early start on your journey and arrive at your destination with plenty of time to settle in.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
A nonstop flight from IAD to ICN typically takes around 15 hours 30 minutes, covering approximately 6,944 miles. Connecting flights on this route usually add 5 hours 20 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
Select the "Business class" and "First class" filters when looking for IAD to ICN flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seoul from Washington Dulles Intl. (IAD)?
From Washington Dulles Intl. (IAD), you can fly directly into Incheon Intl. (ICN) to reach Seoul. Some flights may connect through major hubs like O'Hare Intl. (ORD), Pearson Intl. (YYZ), San Francisco Intl. (SFO) before reaching Seoul. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Seoul (ICN-Incheon Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, Air China, Air France, Alaska Airlines, American Airlines, Asiana Airlines, China Airlines, Delta, EVA Airways, Emirates, Etihad Airways, KLM, Korean Air, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Return price
£881
Distance
11108 km
Average flight time
28 hours 30 mins

Book with confidence

Compare flights from Washington to Seoul easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Seoul. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Incheon Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Incheon Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Incheon Intl. (ICN)

The easiest way to view the best deals on flights from Washington to Seoul today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Incheon Intl. start at just £881 and range up to £1,261.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Seoul
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Seoul flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Incheon Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to Seoul easily and book with confidence

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*Available to Expedia members.