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Kumamoto

$660+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KMJ
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
1 adult, Economy
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Cheap 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 January 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$660
(Booking.com)

Popular in

May

Cheapest in

September

Average price

$823
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.
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From Seattle/Tacoma Intl to Kumamoto
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Highest demand for flights based on searches. 15% potential increase in price ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 14, 2026.

This Booking.com deal was found by Cheapflights users on 1/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:45 pm
SEA
-
KMJ
1 stop25h 25m
ANA
Thu 3/512:35 pm
KMJ
-
SEA
1 stop17h 45m
ANA
Deal found 1/12$660
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:20 pm
SEA
-
KMJ
2 stops34h 40m
ANA
Sat 3/78:35 pm
KMJ
-
SEA
1 stop33h 45m
ANA
Deal found 1/14$699
This Mytrip deal was found by Cheapflights users on 1/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:45 pm
SEA
-
KMJ
1 stop33h 50m
Multiple Airlines
Thu 3/510:00 am
KMJ
-
SEA
3 stops41h 25m
Multiple Airlines
Deal found 1/12$813
This Gurufare deal was found by Cheapflights users on 1/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:15 am
SEA
-
KMJ
2 stops19h 40m
Japan Airlines
Sat 3/712:45 pm
KMJ
-
SEA
2 stops22h 55m
Japan Airlines
Deal found 1/14$897
This Japan Airlines deal was found by Cheapflights users on 1/13. 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 2/111:43 am
SEA
-
KMJ
2 stops40h 12m
Japan Airlines
Wed 2/47:10 pm
KMJ
-
SEA
2 stops31h 45m
Japan Airlines
Deal found 1/13$920
This STARLUX Airlines deal was found by Cheapflights users on 1/11. 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.
Sun 2/111:45 pm
SEA
-
KMJ
1 stop17h 50m
STARLUX Airlines
Wed 2/411:45 am
KMJ
-
SEA
1 stop20h 20m
STARLUX Airlines
Deal found 1/11$1,031
This STARLUX Airlines deal was found by Cheapflights users on 1/13. 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 2/2711:45 pm
SEA
-
KMJ
1 stop17h 50m
STARLUX Airlines
Fri 3/611:45 am
KMJ
-
SEA
1 stop20h 20m
STARLUX Airlines
Deal found 1/13$1,071

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 January 14, 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

Thu 2/26

3:45 pm-10:10 am

1 stop25h 25m

Kumamoto

Thu 3/5

12:35 pm-1:20 pm

1 stop17h 45m

$660

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sat 2/28

5:20 pm-9:00 pm

2 stops34h 40m

Kumamoto

Sat 3/7

8:35 pm-1:20 pm

1 stop33h 45m

$699

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Thu 2/26

3:45 pm-6:35 pm

1 stop33h 50m

Kumamoto

Thu 3/5

10:00 am-10:25 am

3 stops41h 25m

$813

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sun 2/1

11:43 am-8:55 pm

2 stops40h 12m

Kumamoto

Wed 2/4

7:10 pm-9:55 am

2 stops31h 45m

$920

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Fri 2/27

11:45 pm-10:35 am

1 stop17h 50m

Kumamoto

Fri 3/6

11:45 am-3:05 pm

1 stop20h 20m

$1,071

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

  • 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, September is the cheapest month in which you can book a flight from Seattle to Kumamoto (average of $634). Flying from Seattle to Kumamoto in May is currently the most expensive (average of $927). 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 25h 25m. Fly via ANA or Japan Airlines to get the fastest option. Airlines will cover a distance of 5276 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, September is the cheapest month in which you can book a flight from Seattle to Kumamoto (average of $634). Flying from Seattle to Kumamoto in May is currently the most expensive (average of $927). 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.

See more FAQs

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Alternative routes for Seattle to Kumamoto

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