The cheapest times to fly from IWK to IAD are

  • January 8th to April 15th (except the week of April 2nd)
  • May 7th to May 27th (except the week of May 14th)
  • June 11th to July 8th
  • November 5th to December 9th

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 IWK to IAD is late November to early December. Prices can be as high as $2200 for Saturday flights during early January, or as low as $1328 for Wednesday flights around late November to early December.


When to Fly to Washington

Flying from Iwakuni (IWK) to Washington, DC (IAD) will usually cost between $1330 to $1713 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late November to early December with an average ticket price of $1379. Due to high demand the most expensive time to fly is early January, with an average price of $1739. Planning your trip to low-cost times can easily save you $360 on economy flights and even more on first-class flights. Generally, any price below $1381 can be considered a good price for a round-trip IWK to IAD flight.

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

IWK to IAD Flight Prices

Compared to other flights, the IWK to IAD flight is slightly more expensive than the average and costs less than the average flight leaving from Iwakuni. The average price per mile (for a direct flight) is $0.12, which is far below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to IAD, and Tuesday the cheapest day to fly back into IWK. 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 $305 (16%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $1386. Return trip prices are from the IAD to IWK 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 IWK to IAD 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 39 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from IWK to IAD while comparing.

Destination alternative #1: Baltimore/Washington International Thurgood Marshall Airport (BWI) in Baltimore, MD

  • 45 miles (72 km) away from IAD
  • Usually 0.58% less expensive than IAD
  • 2-layover flights available

See IWK to BWI flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 13 major airlines flying this route most often: Air Canada, Air France, Alaska, ANA, Asiana, British Airways, Delta, Fiji Airways, JAL, Lufthansa, Qatar Airways, Singapore Airlines, United, and potentially more during busy seasons.

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

The distance between the two airports is roughly 7039 miles or 11328 kilometers.

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

The real-world flight time for a nonstop IWK to IAD flight is about 13 hour 39 minutes.

How many flights go between Iwakuni and Washington, DC?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from IWK to IAD.


Airport Location Info


Departing Airport

Origination code IWK
Origination airport name Iwakuni MCAS Airport
City Iwakuni
Country Japan
Latitude 34.1
Longitude 132.2

Return Airport

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


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.