$550 Cheap Flights from Washington (IAD) to Seoul (ICN)

View $550 flight on Fri, Sep 12, 2025Opens in a new window

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

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Cheap Flights from Washington to Seoul (IAD-ICN)

Prices were available within the past 7 days and start at $550 for one-way flights and $1,021 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Aug 12 - Tue, Sep 16
IAD
Washington
ICN
Seoul
$1,021 Roundtrip, found 20 hours ago
$1,021
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Aug 12 from Washington to Seoul, returning Tue, Sep 16, priced at $1,021 found 20 hours ago
Turkish Airlines
Mon, Nov 10 - Wed, Nov 19
IAD
Washington
ICN
Seoul
$1,133 Roundtrip, found 1 day ago
$1,133
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Mon, Nov 10 from Washington to Seoul, returning Wed, Nov 19, priced at $1,133 found 1 day ago
WestJet
Fri, Oct 3 - Sun, Oct 12
IAD
Washington
ICN
Seoul
$1,197 Roundtrip, found 7 hours ago
$1,197
Roundtrip
found 7 hours ago
Select WestJet flight, departing Fri, Oct 3 from Washington to Seoul, returning Sun, Oct 12, priced at $1,197 found 7 hours ago
American Airlines
Tue, Sep 2 - Tue, Sep 23
IAD
Washington
ICN
Seoul
$1,217 Roundtrip, found 1 hour ago
$1,217
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Tue, Sep 2 from Washington to Seoul, returning Tue, Sep 23, priced at $1,217 found 1 hour ago
China Airlines
Tue, Sep 9 - Tue, Oct 14
IAD
Washington
ICN
Seoul
$1,276 Roundtrip, found 7 hours ago
$1,276
Roundtrip
found 7 hours ago
Select China Airlines flight, departing Tue, Sep 9 from Washington to Seoul, returning Tue, Oct 14, priced at $1,276 found 7 hours ago
Air China
Fri, Nov 21 - Fri, Dec 5
IAD
Washington
ICN
Seoul
$1,302 Roundtrip, found 1 day ago
$1,302
Roundtrip
found 1 day ago
Select Air China flight, departing Fri, Nov 21 from Washington to Seoul, returning Fri, Dec 5, priced at $1,302 found 1 day ago
United
Mon, Aug 18 - Wed, Dec 24
IAD
Washington
ICN
Seoul
$1,477 Roundtrip, found 1 day ago
$1,477
Roundtrip
found 1 day ago
Select United flight, departing Mon, Aug 18 from Washington to Seoul, returning Wed, Dec 24, priced at $1,477 found 1 day ago
Hawaiian Airlines
Wed, Oct 1 - Sun, Oct 12
IAD
Washington
ICN
Seoul
$1,477 Roundtrip, found 2 days ago
$1,477
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Wed, Oct 1 from Washington to Seoul, returning Sun, Oct 12, priced at $1,477 found 2 days ago
Alaska Airlines
Thu, Nov 6 - Thu, Nov 13
IAD
Washington
ICN
Seoul
$1,477 Roundtrip, found 4 hours ago
$1,477
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Nov 6 from Washington to Seoul, returning Thu, Nov 13, priced at $1,477 found 4 hours ago
Lufthansa
Mon, Sep 1 - Wed, Sep 10
IAD
Washington
ICN
Seoul
$1,518 Roundtrip, found 4 hours ago
$1,518
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Mon, Sep 1 from Washington to Seoul, returning Wed, Sep 10, priced at $1,518 found 4 hours ago

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

March is typically the cheapest month to fly

From $860 - $1,493 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seoul

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gimpo Intl. GMP. Closest option available. Average driving time to city center is 20 minutes. Flights from $2,334
GMP
Gimpo Intl.
Closest
Average driving time to city center20 min
Flights from $2,334
Flights from Washington (IAD) to Seoul (ICN)
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, Emirates, Ethiopian Airlines, Etihad Airways, Hawaiian Airlines, KLM, Korean Air, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United, WestJet
Roundtrip price
$1,021
Distance
6942 mi
Average flight time
14 hours 10 mins

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 August. 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 $550 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 $1664 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 Delta flight leaving IAD on July 21 2025 and touching down at ICN. The price was last updated on July 1 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 Delta. This airline currently offers the cheapest one-way ticket on this route, starting from $1017. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on September 23 2025. Prices were last updated on July 1 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.