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Kumamoto

$710+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KMJ
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
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 November 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$648
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$1,081
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. 21% potential increase in price ($282 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($61 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 5, 2025.

This ANA deal was found by Cheapflights users on 11/3. 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 ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:40 pmSEA - KMJ
1 stop32h 45mANA
Thu 12/48:35 pmKMJ - SEA
1 stop33h 45mANA
Deal found 11/3$845
This Japan Airlines deal was found by Cheapflights users on 11/4. 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 11/3012:10 pmSEA - KMJ
1 stop28h 15mJapan Airlines
Thu 12/410:00 amKMJ - SEA
2 stops40h 03mJapan Airlines
Deal found 11/4$926
This China Airlines deal was found by Cheapflights users on 11/3. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2912:10 amSEA - KMJ
1 stop24h 20mChina Airlines
Thu 12/46:30 pmKMJ - SEA
1 stop16h 40mChina Airlines
Deal found 11/3$958
This American Airlines deal was found by Cheapflights users on 11/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2912:59 amSEA - KMJ
2 stops25h 46mAmerican Airlines
Thu 12/410:00 amKMJ - SEA
1 stop16h 50mAmerican Airlines
Deal found 11/4$1,123
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:10 amSEA - KMJ
2 stops41h 20mDelta
Fri 12/267:10 pmKMJ - SEA
1 stop30h 50mDelta
Deal found 11/4$2,592

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 November 5, 2025.
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

Wed 4/8

4:30 pm-5:50 pm

2 stops33h 20m

Kumamoto

Tue 4/21

7:35 am-2:25 pm

2 stops22h 50m

$710

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sun 11/30

3:40 pm-5:25 pm

1 stop32h 45m

Kumamoto

Thu 12/4

8:35 pm-1:20 pm

1 stop33h 45m

$845

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Tue 4/7

6:57 am-8:55 pm

2 stops21h 58m

Kumamoto

Wed 4/22

12:25 pm-2:25 pm

2 stops18h 00m

$853

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Tue 4/7

6:57 am-8:55 pm

2 stops21h 58m

Kumamoto

Thu 4/23

10:40 am-2:25 pm

1 stop19h 45m

$897

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sun 11/30

12:10 pm-9:25 am

1 stop28h 15m

Kumamoto

Thu 12/4

10:00 am-9:03 am

2 stops40h 03m

$926

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sat 11/29

12:10 am-5:30 pm

1 stop24h 20m

Kumamoto

Thu 12/4

6:30 pm-6:10 pm

1 stop16h 40m

$958

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Sun 1/25

5:50 am-8:40 pm

3 stops21h 50m

Kumamoto

Sat 2/14

12:50 pm-2:31 pm

2 stops18h 41m

$976

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Mon 4/6

1:15 am-10:45 am

1 stop17h 30m

Kumamoto

Mon 4/20

11:55 am-4:10 pm

1 stop20h 15m

$994

SeattleKumamoto

SEA - KMJ

SEAKMJ

Seattle/Tacoma Intl

Tue 4/7

1:10 am-5:40 pm

1 stop24h 30m

Kumamoto

Sun 4/19

6:40 pm-7:30 pm

1 stop16h 50m

$1,010

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

  • 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 $931). 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 28h 15m. 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 $931). 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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Portland to Kumamoto flights

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