Cheap flights from Incheon Intl Airport to Washington, D.C. from $640

In general, November is the cheapest month to fly from Incheon Intl Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $594. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $878.

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $1,258. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Incheon Intl Airport to Washington, D.C. Dulles Intl Airport for around $1,811.

Fly from Incheon Intl to Washington, D.C. Dulles Intl for the best Incheon Intl - Washington, D.C. Dulles Intl flight prices

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $1,337 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Incheon Intl Airport for as low as $844 on momondo.

There are 3 cabin classes available to choose from on Incheon Intl Airport to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 25% on your flight if you consider stops on a Incheon Intl Airport to Washington, D.C. Dulles Intl Airport flight.

EVA Air, United Airlines, and Alaska Airlines are the most popular carriers operating from Incheon Intl to Washington, D.C. Dulles Intl

Korean Air, United Airlines and AIR PREMIA are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Incheon Intl Airport according to our data. Korean Air is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 5 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between Incheon and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 89 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Korean Air have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

Dallas (DFW) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dallas (DFW) offer the lowest average round-trip price of $723.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 17h 44m.

Dallas (DFW) has the shortest average layover time for this route: 1h 42m.

As of June 2026, there are 2 flights per day flying from Incheon Intl Airport to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 10:00AM, with 100% of flights taking off at noon.

18 flights are operational weekly from Incheon Intl Airport to Washington, D.C. Dulles Intl Airport as of June 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.