$439 Cheap Flights from Seoul (ICN) to Washington (IAD)

View $439 flight on Wed, Oct 15, 2025Opens in a new window

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

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Cheap Flights from Seoul to Washington (ICN-IAD)

Prices were available within the past 7 days and start at $439 for one-way flights and $496 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Sep 17 - Tue, Sep 23
ICN
Seoul
IAD
Washington
$496 Roundtrip, found 6 days ago
$496
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Sep 17 from Seoul to Washington, returning Tue, Sep 23, priced at $496 found 6 days ago
Alaska Airlines
Sun, Oct 12 - Wed, Apr 8
ICN
Seoul
IAD
Washington
$551 Roundtrip, found 2 days ago
$551
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sun, Oct 12 from Seoul to Washington, returning Wed, Apr 8, priced at $551 found 2 days ago
United
Tue, Nov 11 - Mon, Nov 24
ICN
Seoul
IAD
Washington
$563 Roundtrip, found 2 days ago
$563
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 11 from Seoul to Washington, returning Mon, Nov 24, priced at $563 found 2 days ago
Hawaiian Airlines
Sun, Dec 14 - Wed, Jan 7
ICN
Seoul
IAD
Washington
$570 Roundtrip, found 2 days ago
$570
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sun, Dec 14 from Seoul to Washington, returning Wed, Jan 7, priced at $570 found 2 days ago
American Airlines
Tue, Nov 11 - Thu, Nov 20
ICN
Seoul
IAD
Washington
$933 Roundtrip, found 2 days ago
$933
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Nov 11 from Seoul to Washington, returning Thu, Nov 20, priced at $933 found 2 days ago
WestJet
Sun, Oct 12 - Fri, Oct 17
ICN
Seoul
IAD
Washington
$1,029 Roundtrip, found 5 days ago
$1,029
Roundtrip
found 5 days ago
Select WestJet flight, departing Sun, Oct 12 from Seoul to Washington, returning Fri, Oct 17, priced at $1,029 found 5 days ago
Asiana Airlines
Wed, Oct 15 - Thu, Oct 23
ICN
Seoul
IAD
Washington
$1,074 Roundtrip, just found
$1,074
Roundtrip
just found
Select Asiana Airlines flight, departing Wed, Oct 15 from Seoul to Washington, returning Thu, Oct 23, priced at $1,074 just found
Air China
Fri, Oct 24 - Fri, Oct 31
ICN
Seoul
IAD
Washington
$1,188 Roundtrip, found 2 hours ago
$1,188
Roundtrip
found 2 hours ago
Select Air China flight, departing Fri, Oct 24 from Seoul to Washington, returning Fri, Oct 31, priced at $1,188 found 2 hours ago
China Airlines
Thu, Sep 4 - Sat, Sep 13
ICN
Seoul
IAD
Washington
$1,297 Roundtrip, found 2 days ago
$1,297
Roundtrip
found 2 days ago
Select China Airlines flight, departing Thu, Sep 4 from Seoul to Washington, returning Sat, Sep 13, priced at $1,297 found 2 days ago
Ethiopian Airlines
Thu, Oct 2 - Thu, Oct 16
ICN
Seoul
IAD
Washington
$1,304 Roundtrip, found 1 day ago
$1,304
Roundtrip
found 1 day ago
Select Ethiopian Airlines flight, departing Thu, Oct 2 from Seoul to Washington, returning Thu, Oct 16, priced at $1,304 found 1 day ago

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

February is typically the cheapest month to fly

From $689 - $1,024 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $1,407
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $1,407
Flights from Seoul (ICN) to Washington (IAD)
Origin airport
Incheon Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Air China, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, China Airlines, Delta, Ethiopian Airlines, Etihad Airways, Hawaiian Airlines, Japan Airlines, KLM, Korean Air, United
Roundtrip price
$495
Distance
6942 mi
Average flight time
14 hours 50 mins

Seoul to Washington Flights

The cheapest times to fly from Seoul to Washington

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 Seoul to Washington are during the month of September. You can find some of the cheapest flights from Seoul to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seoul to Washington

Sunday is one of the best days to book for cheap flights from Seoul to Washington: 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 Seoul to Washington

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 Seoul to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $439 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 Seoul to Washington 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 Seoul to Washington 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 Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD) cost?
Score cheap return fares from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD) starting at $1288. Grab a seat and take off on your trip. 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 ICN on July 29 2025 and touching down at IAD. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from ICN to IAD?
The cheapest flights from ICN to IAD 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 Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
You can fly directly from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD) on a Korean Air flight.
What is the cheapest airline that flies from ICN to IAD?
With prices starting from $1081 for a one-way journey from ICN to IAD, Korean Air is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ICN on October 17 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
On average, there is just 1 direct flight leaving from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD) per day. If this doesn't suit your schedule, think about flights with layovers. Just customize your search on Expedia to include one stop or more to discover the next best option.
What are the most popular departure times for flights from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
More people fly between ICN and IAD at 10 AM than at any other point in the day. Looking for a quieter experience? Travel outside of rush hours and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from ICN to IAD?
Sunday has the most flights from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD). Consider traveling on this day and you'll have the best chance of finding a schedule that works for you.
What is the earliest flight from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
Catch the earliest flight at around 10:15AM UTC+9, departing from Incheon Intl. Airport (ICN). You'll be flying for roughly 13h 35m, landing at Washington Dulles Intl. Airport (IAD) at approximately 9:50AM UTC-5.
How long does it take to fly from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
The average flight time from ICN to IAD is 13 hours and 35 minutes, covering a distance of 7,000 mi.
What airline has the least delays from ICN to IAD?
Korean Air has the best performance for on-time direct flights from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD), with an on-time score of 82%. Use the Expedia App to check your flight status before you take off and receive notifications about any changes.
What is the best time to fly from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
To reach Washington Dulles Intl. Airport (IAD) on time, opt for a flight that takes off from Incheon Intl. Airport (ICN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Washington from Incheon Intl. Airport (ICN)?
Explore your flight options from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD). This is the only airport in Washington you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from ICN to IAD right before your getaway is generally more expensive. However, if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ICN to IAD flight and hotel package?
Compared with arranging hotels and flights separately, booking an ICN to IAD flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place takes the hassle out of travel planning. Simply secure your flights and choose from our extensive range of hotels, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Incheon Intl. Airport (ICN) to Washington Dulles Intl. Airport (IAD)?
In most instances, you can reschedule or cancel your ICN to IAD flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you want further information, visit our Customer Service portal.

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