$702 Cheap Flights from Seoul (GMP) to Washington (IAD)

View $702 flight on Thu, Dec 18, 2025Opens in a new window

Popular airlines from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from Seoul to Washington (GMP-IAD)

Prices were available within the past 7 days and start at $702 for one-way flights and $1,050 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All Nippon Airways
Thu, Dec 18 - Wed, Mar 18
GMP
Seoul
IAD
Washington
$1,050 Roundtrip, found 22 hours ago
$1,050
Roundtrip
found 22 hours ago
Select All Nippon Airways flight, departing Thu, Dec 18 from Seoul to Washington, returning Wed, Mar 18, priced at $1,050 found 22 hours ago
All Nippon Airways
Thu, Feb 19 - Wed, Feb 25
GMP
Seoul
IAD
Washington
$1,055 Roundtrip, found 1 day ago
$1,055
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Thu, Feb 19 from Seoul to Washington, returning Wed, Feb 25, priced at $1,055 found 1 day ago
All Nippon Airways
Tue, Feb 10 - Wed, Jul 22
GMP
Seoul
IAD
Washington
$1,056 Roundtrip, found 2 days ago
$1,056
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Tue, Feb 10 from Seoul to Washington, returning Wed, Jul 22, priced at $1,056 found 2 days ago
All Nippon Airways
Thu, Dec 4 - Wed, Dec 31
GMP
Seoul
IAD
Washington
$1,061 Roundtrip, found 4 days ago
$1,061
Roundtrip
found 4 days ago
Select All Nippon Airways flight, departing Thu, Dec 4 from Seoul to Washington, returning Wed, Dec 31, priced at $1,061 found 4 days ago
All Nippon Airways
Tue, Sep 15 - Sat, Sep 19
GMP
Seoul
IAD
Washington
$1,108 Roundtrip, found 2 days ago
$1,108
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Tue, Sep 15 from Seoul to Washington, returning Sat, Sep 19, priced at $1,108 found 2 days ago
All Nippon Airways
Thu, Dec 4 - Sun, Jan 4
GMP
Seoul
IAD
Washington
$1,112 Roundtrip, found 1 day ago
$1,112
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Thu, Dec 4 from Seoul to Washington, returning Sun, Jan 4, priced at $1,112 found 1 day ago
All Nippon Airways
Thu, Dec 18 - Sat, Jan 3
GMP
Seoul
IAD
Washington
$1,113 Roundtrip, found 3 days ago
$1,113
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Thu, Dec 18 from Seoul to Washington, returning Sat, Jan 3, priced at $1,113 found 3 days ago
All Nippon Airways
Wed, Sep 16 - Wed, Sep 30
GMP
Seoul
IAD
Washington
$1,120 Roundtrip, found 6 hours ago
$1,120
Roundtrip
found 6 hours ago
Select All Nippon Airways flight, departing Wed, Sep 16 from Seoul to Washington, returning Wed, Sep 30, priced at $1,120 found 6 hours ago
Jeju Air
Tue, Feb 24 - Fri, Apr 10
GMP
Seoul
IAD
Washington
$1,168 Roundtrip, found 5 days ago
$1,168
Roundtrip
found 5 days ago
Select Jeju Air flight, departing Tue, Feb 24 from Seoul to Washington, returning Fri, Apr 10, priced at $1,168 found 5 days ago
Air China
Mon, Jan 5 - Fri, May 8
GMP
Seoul
IAD
Washington
$3,627 Roundtrip, found 7 hours ago
$3,627
Roundtrip
found 7 hours ago
Select Air China flight, departing Mon, Jan 5 from Seoul to Washington, returning Fri, May 8, priced at $3,627 found 7 hours ago

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. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $1,304
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $1,304

Frequently asked questions

How much does a flight from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $702 or cheap return flight from $1,050 from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
December is the most affordable month to fly from GMP to IAD. Timing your trip outside of the busy season is often the key to scoring lower fares.
Which airlines fly direct from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
Although Seoul (GMP-Gimpo Intl.) doesn't offer any direct flights to Washington Dulles Intl. Airport (IAD), other airports have nonstop routes. Departing from Incheon Intl. Airport (ICN) will get you to Washington without any layovers.
What is the cheapest airline that flies from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from GMP to IAD. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
There aren't any daily direct flights available from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from GMP to IAD?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD) route, aim to fly before 3 PM. Departures after this time 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.
Is it cheaper to buy a plane ticket from Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD) last-minute?
Waiting until just before your departure to book a flight from GMP to IAD generally means paying more. While you may find some last-minute discounts, there's no guarantee. Be flexible with your travel plans to maximize your chances of snagging a bargain.
Is it cheaper to book a GMP to IAD flight and hotel package?
Booking a GMP to IAD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our extensive range of hotels and then add activities, car rentals and flights 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 Gimpo Intl. Airport (GMP) to Washington Dulles Intl. Airport (IAD)?
Typically, you're able to reschedule or cancel your GMP to IAD flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need more information, head to our Customer Service portal.

Travel information

Origin airport
Gimpo Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
All Nippon Airways
Roundtrip price
$1,049
Distance
6929 mi

Book with confidence

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 December. 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 $702 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.

 

Seoul to Washington Flights

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*Available to One Key members.