$725 Cheap Flights from Kumamoto (KMJ) to Washington (IAD)

View $725 flight on Sat, Oct 18, 2025Opens in a new window

Popular airlines from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from Kumamoto to Washington (KMJ-IAD)

Prices were available within the past 7 days and start at $725 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Kumamoto (KMJ) to Washington (IAD)
Origin airport
Kumamoto
Destination airport
Washington Dulles Intl.
Distance
7154 mi

Kumamoto to Washington Flights

The cheapest times to fly from Kumamoto to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kumamoto to Washington are during the month of . You can find some of the cheapest flights from Kumamoto to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kumamoto to Washington

Sunday is one of the best days to book for cheap flights from Kumamoto to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kumamoto to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kumamoto to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $725 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kumamoto to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kumamoto to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD) cost?
Snag a cheap one-way flight from $725 or cheap return flight from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)?
is the least expensive month to fly from KMJ to IAD. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from KMJ to IAD, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)?
There are no daily direct flights departing from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from KMJ to IAD?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)?
To reach Washington Dulles Intl. Airport (IAD) without delays, select a flight that leaves from Kumamoto Airport (KMJ) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until right before your break to book a ticket from KMJ to IAD often results in higher prices. While you might find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of snagging a bargain.
Is it cheaper to book a KMJ to IAD flight and hotel package?
Booking a KMJ to IAD flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Kumamoto Airport (KMJ) to Washington Dulles Intl. Airport (IAD)?
In most cases, you can reschedule or cancel your KMJ to IAD flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like further information, visit our Customer Service portal.

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*Available to One Key members.