Cheap flights from Washington, D.C. Dulles Intl Airport to Seoul from $386

The cheapest month to fly to Incheon Intl Airport from Washington, D.C. Dulles Intl Airport is in April. Flight prices, which tend to average around $1,405, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of April, then departing from Washington, D.C. Dulles Intl Airport during the month October is also very affordable. Most momondo users find prices during this month for around $1,636.

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Incheon Intl Airport is on a Tuesday when prices can be found for as low as $1,289. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,529. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

In the morning is the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Incheon Intl Airport when you can find flight prices for as low as $1,351. Flying to Incheon Intl Airport in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,544 on average. Flights to Incheon Intl Airport from Washington, D.C. Dulles Intl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Incheon Intl Airport from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,758 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Washington, D.C. Dulles Intl Airport for as low as $1,424 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Incheon Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 31% of flights between Washington, D.C. and Incheon have experienced a delay on any given week. The average delay length over the past 12 months has been 114 minutes.

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

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday 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 31% of their flights experiencing any sort of delay.

Dallas (DFW) was the most common stop: 47% of momondo users choosing 1-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of $1,259.

Flights connecting via Toronto (YYZ) have the shortest average one-way travel time: 18h 05m.

Dallas (DFW) has the shortest average layover time for this route: 2h 11m.

2 flights are operational daily from Washington, D.C. Dulles Intl Airport to Incheon Intl Airport as of February 2026. The most popular departure time for this route is 11:00AM, with 100% of flights per day taking off at noon.

As of February 2026, 14 flights take off from Washington, D.C. Dulles Intl Airport and land in Incheon Intl Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.