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Kumamoto

$1,165+ Cheap flights from Seattle (SEA) to Kumamoto (KMJ)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KMJ
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Seattle to Kumamoto

Cheapest flights from Seattle to Kumamoto
Explore the most affordable flight options available from Seattle to Kumamoto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This Japan Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/226:09 am
SEA
-
KMJ
2 stops33h 16m
Japan Airlines
Thu 2/268:15 pm
KMJ
-
SEA
1 stop30h 40m
Japan Airlines
Deal found 2/10$1,165
This STARLUX Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/291:15 am
SEA
-
KMJ
1 stop17h 30m
STARLUX Airlines
Mon 4/611:55 am
KMJ
-
SEA
1 stop20h 15m
STARLUX Airlines
Deal found 2/12$1,182
This STARLUX Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2211:45 pm
SEA
-
KMJ
1 stop17h 50m
STARLUX Airlines
Thu 2/2611:45 am
KMJ
-
SEA
1 stop20h 20m
STARLUX Airlines
Deal found 2/9$1,251
This STARLUX Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2712:45 am
SEA
-
KMJ
1 stop18h 00m
STARLUX Airlines
Sat 4/411:55 am
KMJ
-
SEA
1 stop20h 15m
STARLUX Airlines
Deal found 2/11$1,901

Find flight deals from Seattle to Kumamoto

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Kumamoto (KMJ). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,182
(STARLUX Airlines)

Popular in

June

Cheapest in

January

Average price

$709
Provider with most accurate pricing for Seattle/Tacoma Intl-Kumamoto flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Kumamoto flights.
Search Deals
From Seattle/Tacoma Intl to Kumamoto
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($146 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Kumamoto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
Use the filters below to find and compare flights from Seattle to Kumamoto that are best for you.

Fly from

Seattle

Fly to

Kumamoto

Route

Depart

Return

Price

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sun 3/29

1:15 am-10:45 am

1 stop17h 30m

Kumamoto

Mon 4/6

11:55 am-4:10 pm

1 stop20h 15m

$1,182

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Fri 3/27

12:45 am-10:45 am

1 stop18h 00m

Kumamoto

Sat 4/4

11:55 am-4:10 pm

1 stop20h 15m

$1,901

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Compare providers for flights from Seattle to Kumamoto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Kumamoto in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Kumamoto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Kumamoto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Kumamoto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Kumamoto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Kumamoto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Kumamoto

Have a flexible travel schedule? Discover the best time to fly to Kumamoto from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Kumamoto

What is the cheapest month to book a flight from Seattle to Kumamoto?

Currently, January is the cheapest month in which you can book a flight from Seattle to Kumamoto (average of $629). Flying from Seattle to Kumamoto in June is currently the most expensive (average of $859). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Kumamoto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Kumamoto?

    There are many flights that can get you from Seattle to Kumamoto in 17h 30m. Fly via STARLUX Airlines to get the fastest option. Airlines will cover a distance of 5276 mi.

  • Can I find deals for flights from Seattle to Kumamoto that include hotel bookings?

    Yes. In addition to deals on Seattle to Kumamoto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Kumamoto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Kumamoto.

  • Can I find deals for business class flights from Seattle to Kumamoto?

    Yes. Cheapflights offers flight deals from Seattle to Kumamoto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Kumamoto?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Kumamoto (average of $629). Flying from Seattle to Kumamoto in June is currently the most expensive (average of $859). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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