$359 Cheap Flights from Seattle (SEA) to Kumamoto (KMJ)

View $359 flight on Sun, Jan 25, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Kumamoto Airport (KMJ)

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Cheap Flights from Seattle to Kumamoto (SEA-KMJ)

Prices were available within the past 7 days and start at $359 for one-way flights and $669 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All Nippon Airways
Sun, Jan 25 - Sat, Feb 14
SEA
Seattle
KMJ
Kumamoto
$669 Roundtrip, found 2 days ago
$669
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Sun, Jan 25 from Seattle to Kumamoto, returning Sat, Feb 14, priced at $669 found 2 days ago
United
Sun, Jan 25 - Mon, Feb 2
SEA
Seattle
KMJ
Kumamoto
$672 Roundtrip, found 6 days ago
$672
Roundtrip
found 6 days ago
Select United flight, departing Sun, Jan 25 from Seattle to Kumamoto, returning Mon, Feb 2, priced at $672 found 6 days ago
All Nippon Airways
Sun, Jan 25 - Sat, Feb 14
SEA
Seattle
KMJ
Kumamoto
$674 Roundtrip, found 2 days ago
$674
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Sun, Jan 25 from Seattle to Kumamoto, returning Sat, Feb 14, priced at $674 found 2 days ago
United
Sun, Jan 25 - Mon, Feb 2
SEA
Seattle
KMJ
Kumamoto
$678 Roundtrip, found 6 days ago
$678
Roundtrip
found 6 days ago
Select United flight, departing Sun, Jan 25 from Seattle to Kumamoto, returning Mon, Feb 2, priced at $678 found 6 days ago
Japan Airlines
Tue, Jan 20 - Wed, Feb 18
SEA
Seattle
KMJ
Kumamoto
$681 Roundtrip, found 6 days ago
$681
Roundtrip
found 6 days ago
Select Japan Airlines flight, departing Tue, Jan 20 from Seattle to Kumamoto, returning Wed, Feb 18, priced at $681 found 6 days ago
All Nippon Airways
Sat, Jan 24 - Wed, Feb 18
SEA
Seattle
KMJ
Kumamoto
$689 Roundtrip, found 6 days ago
$689
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Sat, Jan 24 from Seattle to Kumamoto, returning Wed, Feb 18, priced at $689 found 6 days ago
Alaska Airlines
Sat, Jan 24 - Thu, Feb 19
SEA
Seattle
KMJ
Kumamoto
$693 Roundtrip, found 2 days ago
$693
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 24 from Seattle to Kumamoto, returning Thu, Feb 19, priced at $693 found 2 days ago
Japan Airlines
Sat, Jan 24 - Thu, Feb 19
SEA
Seattle
KMJ
Kumamoto
$698 Roundtrip, found 2 days ago
$698
Roundtrip
found 2 days ago
Select Japan Airlines flight, departing Sat, Jan 24 from Seattle to Kumamoto, returning Thu, Feb 19, priced at $698 found 2 days ago
Alaska Airlines
Mon, Apr 27 - Tue, May 12
SEA
Seattle
KMJ
Kumamoto
$698 Roundtrip, found 2 days ago
$698
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Apr 27 from Seattle to Kumamoto, returning Tue, May 12, priced at $698 found 2 days ago
American Airlines
Sun, Jan 25 - Mon, Feb 2
SEA
Seattle
KMJ
Kumamoto
$747 Roundtrip, found 6 days ago
$747
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Jan 25 from Seattle to Kumamoto, returning Mon, Feb 2, priced at $747 found 6 days ago

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ) cost?
Secure a cheap one-way flight from $359 or cheap return flight from $669 from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ)?
January is the least expensive month to fly from SEA to KMJ. Avoiding peak travel times is often the key to finding better deals on flights.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to KMJ. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ)?
There aren't any daily direct flights from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from SEA to KMJ?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**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 Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ) last-minute?
Booking your flight from SEA to KMJ shortly before your getaway is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a SEA to KMJ flight and hotel package?
You'll typically save money by securing a SEA to KMJ flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your preferred accommodations and flights, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Kumamoto Airport (KMJ)?
In most cases, you can cancel or modify your SEA to KMJ flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Kumamoto
Airlines serving
All Nippon Airways, American Airlines, Japan Airlines, STARLUX Airlines
Roundtrip price
$669
Distance
5279 mi

Book with confidence

Seattle to Kumamoto Flights

The cheapest times to fly from Seattle to Kumamoto

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 Seattle to Kumamoto are during the month of January. You can find some of the cheapest flights from Seattle to Kumamoto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Kumamoto

Sunday is one of the best days to book for cheap flights from Seattle to Kumamoto: 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 Seattle to Kumamoto

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 Seattle to Kumamoto in 2025. You can also book with separate airlines for your outbound and return journeys, from $359 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 Seattle to Kumamoto 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 Seattle to Kumamoto 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.

 

Seattle to Kumamoto Flights

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*Available to One Key members.