$549 Cheap Flights from San Francisco (SFO) to Kumamoto (KMJ)

View $549 flight on Tue, Sep 23, 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)

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Cheap Flights from San Francisco to Kumamoto (SFO-KMJ)

Prices were available within the past 7 days and start at $549 for one-way flights and $680 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Asiana Airlines
Sat, Sep 6 - Thu, Sep 11
SFO
San Francisco
KMJ
Kumamoto
$680 Roundtrip, found 5 days ago
$680
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Sat, Sep 6 from San Francisco to Kumamoto, returning Thu, Sep 11, priced at $680 found 5 days ago
Asiana Airlines
Thu, Sep 4 - Thu, Sep 11
SFO
San Francisco
KMJ
Kumamoto
$686 Roundtrip, found 5 days ago
$686
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Thu, Sep 4 from San Francisco to Kumamoto, returning Thu, Sep 11, priced at $686 found 5 days ago
Asiana Airlines
Tue, Sep 9 - Thu, Sep 18
SFO
San Francisco
KMJ
Kumamoto
$686 Roundtrip, found 4 days ago
$686
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Tue, Sep 9 from San Francisco to Kumamoto, returning Thu, Sep 18, priced at $686 found 4 days ago
Asiana Airlines
Thu, Sep 11 - Thu, Sep 18
SFO
San Francisco
KMJ
Kumamoto
$691 Roundtrip, found 4 days ago
$691
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Thu, Sep 11 from San Francisco to Kumamoto, returning Thu, Sep 18, priced at $691 found 4 days ago
Asiana Airlines
Thu, Sep 4 - Mon, Sep 15
SFO
San Francisco
KMJ
Kumamoto
$697 Roundtrip, found 5 days ago
$697
Roundtrip
found 5 days ago
Select Asiana Airlines flight, departing Thu, Sep 4 from San Francisco to Kumamoto, returning Mon, Sep 15, priced at $697 found 5 days ago
Asiana Airlines
Tue, Sep 9 - Mon, Sep 15
SFO
San Francisco
KMJ
Kumamoto
$697 Roundtrip, found 4 days ago
$697
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Tue, Sep 9 from San Francisco to Kumamoto, returning Mon, Sep 15, priced at $697 found 4 days ago
Delta
Mon, Sep 8 - Tue, Sep 16
SFO
San Francisco
KMJ
Kumamoto
$811 Roundtrip, found 4 days ago
$811
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Sep 8 from San Francisco to Kumamoto, returning Tue, Sep 16, priced at $811 found 4 days ago
Korean Air
Mon, Dec 1 - Mon, Dec 8
SFO
San Francisco
KMJ
Kumamoto
$866 Roundtrip, found 6 days ago
$866
Roundtrip
found 6 days ago
Select Korean Air flight, departing Mon, Dec 1 from San Francisco to Kumamoto, returning Mon, Dec 8, priced at $866 found 6 days ago
Cathay Pacific
Thu, Sep 18 - Thu, Sep 25
SFO
San Francisco
KMJ
Kumamoto
$943 Roundtrip, found 4 days ago
$943
Roundtrip
found 4 days ago
Select Cathay Pacific flight, departing Thu, Sep 18 from San Francisco to Kumamoto, returning Thu, Sep 25, priced at $943 found 4 days ago
China Airlines
Mon, Sep 1 - Tue, Sep 9
SFO
San Francisco
KMJ
Kumamoto
$965 Roundtrip, found 2 days ago
$965
Roundtrip
found 2 days ago
Select China Airlines flight, departing Mon, Sep 1 from San Francisco to Kumamoto, returning Tue, Sep 9, priced at $965 found 2 days ago
Flights from San Francisco (SFO) to Kumamoto (KMJ)
Origin airport
San Francisco Intl.
Destination airport
Kumamoto
Roundtrip price
$679
Distance
5665 mi

San Francisco to Kumamoto Flights

The cheapest times to fly from San Francisco 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 San Francisco to Kumamoto are during the month of September. You can find some of the cheapest flights from San Francisco to Kumamoto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Kumamoto

Sunday is one of the best days to book for cheap flights from San Francisco 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 San Francisco 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 San Francisco to Kumamoto in 2025. You can also book with separate airlines for your outbound and return journeys, from $549 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 San Francisco 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 San Francisco 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.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ) cost?
Grab a cheap one-way flight from $549 or cheap return flight from $680 from San Francisco Intl. Airport (SFO) 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 San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)?
The cheapest month to fly from SFO to KMJ is September, when demand is low. Off-peak season is usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from SFO to KMJ. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)?
There are no daily direct flights available from San Francisco Intl. Airport (SFO) 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 on your way in no time at all.
What day of the week has the most flights from SFO to KMJ?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the time of year, carrier 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 San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)?
To reach Kumamoto Airport (KMJ) on time, pick a flight that takes off from San Francisco Intl. Airport (SFO) 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 San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ) last-minute?
Booking your ticket from SFO to KMJ shortly before your trip is usually more expensive. However, if you're flexible with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a SFO to KMJ flight and hotel package?
Booking a SFO to KMJ flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our wide range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Kumamoto Airport (KMJ)?
If you reserved your SFO to KMJ flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

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*Available to One Key members.