The cheapest times to fly from IAD to PUS are

  • January 1st to March 11th (except the weeks of February 12th and February 26th)
  • August 13th to December 16th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to PUS is mid to late November. Prices can be as high as $3408 for Saturday flights during late July, or as low as $1127 for Tuesday flights around mid to late November.


When to Fly to Busan

Flying from Washington, DC (IAD) to Busan (PUS) will usually cost between $1203 to $2298 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late November with an average ticket price of $1204. Due to high demand the most expensive time to fly is late July, with an average price of $2228. Planning your trip to low-cost times can easily save you $1024 on economy flights and even more on first-class flights. Generally, any price below $1598 can be considered a good price for a round-trip IAD to PUS flight.

See below for a graph of average weekly prices for the IAD to PUS route. All prices are for round-trip tickets in USD.

IAD to PUS Flight Prices

Compared to other flights, the IAD to PUS flight is more expensive than the average and costs slightly more than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.14, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $153 (9%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1570. Return trip prices are from the PUS to IAD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAD to PUS can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 13 hour 40 minutes may not be realistic.


Flight Hacking IAD to PUS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAD to PUS — but Champion Traveler does!

Hack #1: Shanghai (IAD > PVG > PUS)

  • Price for both tickets: $996
  • Average savings: $602 (37.67%)

See IAD to PVG flights

Hack #2: Taipei (IAD > TPE > PUS)

  • Price for both tickets: $1085
  • Average savings: $514 (32.13%)

See IAD to TPE flights

Hack #3: Beijing (IAD > PEK > PUS)

  • Price for both tickets: $1169
  • Average savings: $430 (26.88%)

See IAD to PEK flights


Flight Questions Answered

Still have questions about flying from IAD to PUS? We’ve got answers.

Which airlines fly this route?

You can find 22 major airlines flying this route most often: Air Canada, Air China, Alaska, American, ANA, Asiana, Austrian, British Airways, Cathay Dragon, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Fiji Airways, Hainan, JAL, KLM, Korean Air, Shanghai Airlines, SWISS, United, and potentially more during busy seasons.

How far away is it from Gimhae International Airport to Washington Dulles International Airport?

The distance between the two airports is roughly 7043 miles or 11335 kilometers.

How long does it take to fly from IAD to PUS?

The real-world flight time for a nonstop IAD to PUS flight is about 13 hour 40 minutes.

How many flights go between Washington, DC and Busan?

It depends on the day of the week and the date, but a typical day might have around 93 available flights from IAD to PUS.


Airport Location Info


Departing Airport

Origination code IAD
Origination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5

Return Airport

Destination code PUS
Destination airport name Gimhae International Airport
City Busan
Country South Korea
Latitude 35.2
Longitude 128.9


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.