$484 Cheap Flights from Washington (IAD) to Seoul (ICN)

View $484 flight on Wed, Aug 27, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Washington to Seoul (IAD-ICN)

Prices were available within the past 7 days and start at $484 for one-way flights and $952 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Turkish Airlines
Mon, Sep 1 - Fri, Sep 19
IAD
Washington
ICN
Seoul
$952 Roundtrip, found 1 day ago
$952
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Mon, Sep 1 from Washington to Seoul, returning Fri, Sep 19, priced at $952 found 1 day ago
Turkish Airlines
Wed, Sep 17 - Fri, Oct 10
IAD
Washington
ICN
Seoul
$962 Roundtrip, found 1 day ago
$962
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Wed, Sep 17 from Washington to Seoul, returning Fri, Oct 10, priced at $962 found 1 day ago
Air China
Sat, Apr 26 - Tue, May 27
IAD
Washington
ICN
Seoul
$966 Roundtrip, found 5 days ago
$966
Roundtrip
found 5 days ago
Select Air China flight, departing Sat, Apr 26 from Washington to Seoul, returning Tue, May 27, priced at $966 found 5 days ago
Turkish Airlines
Sun, Apr 27 - Thu, Jun 5
IAD
Washington
ICN
Seoul
$972 Roundtrip, found 6 days ago
$972
Roundtrip
found 6 days ago
Select Turkish Airlines flight, departing Sun, Apr 27 from Washington to Seoul, returning Thu, Jun 5, priced at $972 found 6 days ago
Turkish Airlines
Sun, Sep 28 - Tue, Oct 21
IAD
Washington
ICN
Seoul
$982 Roundtrip, found 4 hours ago
$982
Roundtrip
found 4 hours ago
Select Turkish Airlines flight, departing Sun, Sep 28 from Washington to Seoul, returning Tue, Oct 21, priced at $982 found 4 hours ago
WestJet
Fri, Sep 5 - Sun, Sep 14
IAD
Washington
ICN
Seoul
$988 Roundtrip, found 3 days ago
$988
Roundtrip
found 3 days ago
Select WestJet flight, departing Fri, Sep 5 from Washington to Seoul, returning Sun, Sep 14, priced at $988 found 3 days ago
Air Canada
Tue, Dec 9 - Sun, Dec 28
IAD
Washington
ICN
Seoul
$1,242 Roundtrip, found 3 hours ago
$1,242
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Tue, Dec 9 from Washington to Seoul, returning Sun, Dec 28, priced at $1,242 found 3 hours ago
China Airlines
Tue, Nov 18 - Mon, Dec 8
IAD
Washington
ICN
Seoul
$1,284 Roundtrip, found 1 day ago
$1,284
Roundtrip
found 1 day ago
Select China Airlines flight, departing Tue, Nov 18 from Washington to Seoul, returning Mon, Dec 8, priced at $1,284 found 1 day ago
American Airlines
Wed, Oct 22 - Sun, Nov 9
IAD
Washington
ICN
Seoul
$1,463 Roundtrip, just found
$1,463
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 22 from Washington to Seoul, returning Sun, Nov 9, priced at $1,463 just found
Lufthansa
Mon, Dec 1 - Mon, Dec 15
IAD
Washington
ICN
Seoul
$1,514 Roundtrip, found 6 days ago
$1,514
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 1 from Washington to Seoul, returning Mon, Dec 15, priced at $1,514 found 6 days ago
Flights from Washington (IAD) to Seoul (ICN)
Origin airport
Washington Dulles Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, Air China, Air France, Air India, Alaska Airlines, American Airlines, Asiana Airlines, China Airlines, Delta, Emirates, Etihad Airways, Hawaiian Airlines, Japan Airlines, KLM, Korean Air, Lufthansa, Qatar Airways, Turkish Airlines, United, WestJet
Roundtrip price
$952
Distance
6942 mi

Washington to Seoul Flights

The cheapest times to fly from Washington to Seoul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Seoul are during the month of September. You can find some of the cheapest flights from Washington to Seoul with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Washington to Seoul

Sunday is one of the best days to book for cheap flights from Washington to Seoul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Washington to Seoul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Seoul in 2025. You can also book with separate airlines for your outbound and return journeys, from $484 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Seoul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Seoul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN) cost?
Snag cheap return tickets starting at $2050 from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Korean Air flight leaving IAD on May 8 2025 and touching down at ICN. The price was last updated on April 22 2025 and has not changed since.
What is the cheapest month to fly from IAD to ICN?
The cheapest flights from IAD to ICN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
You can fly nonstop from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN) on a Korean Air flight.
What is the cheapest airline that flies from IAD to ICN?
Take off from IAD to ICN with Korean Air. This airline currently offers the cheapest one-way ticket on this route, starting from $1275. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on May 7 2025. Prices were last updated on April 22 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
On average, Washington Dulles Intl. Airport (IAD) only offers 1 direct flight to Incheon Intl. Airport (ICN) each day. For additional options, try Expedia’s easy-to-use filter tool. Just enter your details, then select “1 Stop” or “2+ Stops” to discover flights with layovers.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
Flights between IAD and ICN are busiest at 11 AM. For a less crowded experience and possibly cheaper tickets, choose a time outside the usual busy windows.
What day of the week has the most flights from IAD to ICN?
Friday offers the most flights from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN). Consider taking off on this day and you’ll have a greater chance of finding a departure that works with your plans.
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
The earliest flight out of Washington Dulles Intl. Airport (IAD) is at around 11:50AM UTC-5. Hop on this flight and you’ll touch down at Incheon Intl. Airport (ICN) at approximately 5:40PM UTC+9. The total flight duration is 15h 50m.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
The average flight time from IAD to ICN is 15 hours and 50 minutes, covering a total distance of 7,000 mi.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Seoul from Washington Dulles Intl. Airport (IAD)?
Explore your flight options from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN). This is the only Seoul airport you can touch down at if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN) last-minute?
Holding off until just before your trip to book a ticket from IAD to ICN often results in higher prices. While you may find some last-minute offers, there’s no guarantee. Be flexible with your itinerary for the best chance of landing a bargain.
Is it cheaper to book an IAD to ICN flight and hotel package?
Opting for an IAD to ICN flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our impressive range of accommodations and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Incheon Intl. Airport (ICN)?
In most instances, you’re able to cancel or reschedule your IAD to ICN flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline’s guidelines and fees on flight changes, or if you need further details, head to our Customer Service portal.

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*Available to One Key members.