For a smooth departure from IAD, use the Aerotrain to navigate between terminals efficiently. Allow extra time for security during peak afternoon hours.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $785 (Air China) |
One-way from | $459 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $1,081 |
Good round-trip deal | $1,424 or less |
Good one-way deal | $592 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Tue 4/15
11:00 pm-9:45 pm
1 stop33h 45m
Incheon Intl
Thu 5/8
5:50 pm-7:30 pm
1 stop38h 40m
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Mon 4/21
1:30 pm-5:40 pm
1 stop39h 10m
Incheon Intl
Fri 6/27
10:20 am-11:45 am
1 stop38h 25m
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Fri 9/12
6:45 pm-7:40 pm
1 stop35h 55m
Incheon Intl
Thu 9/18
8:45 pm-5:50 pm
1 stop34h 05m
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Mon 4/28
5:38 pm-2:15 pm
2 stops55h 37m
Incheon Intl
Mon 5/5
6:20 pm-5:22 pm
1 stop36h 02m
BaltimoreIncheon
BWI - ICN
BWIICN
Baltimore/Washington
Sat 4/26
8:10 pm-2:35 pm
2 stops53h 25m
Incheon Intl
Tue 5/13
12:45 pm-7:39 pm
1 stop19h 54m
Washington, D.C.Incheon
DCA - ICN
DCAICN
Washington, D.C. Reagan-National
Tue 5/6
6:00 pm-8:30 pm
2 stops37h 30m
Incheon Intl
Sun 5/18
6:20 pm-12:07 pm
2 stops30h 47m
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Tue 4/22
5:38 pm-2:05 pm
2 stops31h 27m
Incheon Intl
Tue 5/20
10:10 am-5:55 am
2 stops32h 45m
Washington, D.C.Incheon
IAD - ICN
IADICN
Washington, D.C. Dulles Intl
Mon 4/28
5:44 pm-4:05 pm
2 stops33h 21m
Incheon Intl
Wed 5/14
5:45 pm-7:55 am
2 stops27h 10m
BaltimoreIncheon
BWI - ICN
BWIICN
Baltimore/Washington
Wed 5/14
2:29 pm-6:45 pm
2 stops39h 16m
Incheon Intl
Tue 5/27
8:45 pm-11:58 pm
2 stops40h 13m
Washington, D.C.Seoul
IAD - GMP
IADGMP
Washington, D.C. Dulles Intl
Tue 4/22
11:00 pm-1:05 pm
1 stop25h 05m
Seoul Gimpo Intl
Tue 5/20
8:35 am-7:30 pm
1 stop23h 55m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*1 star |
To ensure you get the cheapest price possible for a flight from Washington, D.C. to Seoul, you should look to book at least 26 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Seoul (average of $1,002). Flying from Washington, D.C. to Seoul in June is currently the most expensive (average of $1,661). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
When flying from Washington, D.C. to Seoul, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight at noon.
Travelers seeking maximum savings on their Washington, D.C. to Seoul flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from WAS to SEL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.
If weather is an important factor for your trip to Seoul, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Food
Comfort
Entertainment
Overall
Boarding
Crew
Reviews
Chris,Mar 2025
SEA - ICN
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$563 | Average$615 | FlexibilityNo cancel fee | On-time67% | |
Cheapest$807 | Average$1,056 | FlexibilityNo cancel fee | On-time77% | |
Cheapest$865 | Average$1,288 | FlexibilityNo cancel fee | On-time67% | |
Cheapest$876 | Average$1,322 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$877 | Average$1,890 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$877 | Average$1,805 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$1,077 | Average$1,842 | FlexibilityNo cancel fee | On-time81% | |
Cheapest$1,312 | Average$2,023 | FlexibilityNo cancel fee | On-time76% | |
Cheapest$1,559 | Average$1,788 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$1,583 | Average$1,712 | FlexibilityNo cancel fee | On-time77% |