$594 Cheap Flights from Boston (BOS) to Kumamoto (KMJ)

View $594 flight on Mon, Sep 8, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Kumamoto Airport (KMJ)

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Cheap Flights from Boston to Kumamoto (BOS-KMJ)

Prices were available within the past 7 days and start at $594 for one-way flights and $1,131 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Wed, Oct 8 - Mon, Oct 13
BOS
Boston
KMJ
Kumamoto
$1,131 Roundtrip, found 3 days ago
$1,131
Roundtrip
found 3 days ago
Select Korean Air flight, departing Wed, Oct 8 from Boston to Kumamoto, returning Mon, Oct 13, priced at $1,131 found 3 days ago
United
Tue, Aug 19 - Sun, Aug 24
BOS
Boston
KMJ
Kumamoto
$1,140 Roundtrip, found 6 days ago
$1,140
Roundtrip
found 6 days ago
Select United flight, departing Tue, Aug 19 from Boston to Kumamoto, returning Sun, Aug 24, priced at $1,140 found 6 days ago
United
Fri, Aug 15 - Sun, Aug 24
BOS
Boston
KMJ
Kumamoto
$1,150 Roundtrip, found 6 days ago
$1,150
Roundtrip
found 6 days ago
Select United flight, departing Fri, Aug 15 from Boston to Kumamoto, returning Sun, Aug 24, priced at $1,150 found 6 days ago
All Nippon Airways
Sat, Aug 23 - Tue, Sep 2
BOS
Boston
KMJ
Kumamoto
$1,151 Roundtrip, found 1 day ago
$1,151
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Sat, Aug 23 from Boston to Kumamoto, returning Tue, Sep 2, priced at $1,151 found 1 day ago
All Nippon Airways
Sat, Aug 23 - Tue, Sep 2
BOS
Boston
KMJ
Kumamoto
$1,153 Roundtrip, found 1 day ago
$1,153
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Sat, Aug 23 from Boston to Kumamoto, returning Tue, Sep 2, priced at $1,153 found 1 day ago
All Nippon Airways
Sat, Aug 23 - Tue, Sep 2
BOS
Boston
KMJ
Kumamoto
$1,157 Roundtrip, found 1 day ago
$1,157
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Sat, Aug 23 from Boston to Kumamoto, returning Tue, Sep 2, priced at $1,157 found 1 day ago
All Nippon Airways
Sat, Aug 23 - Tue, Sep 2
BOS
Boston
KMJ
Kumamoto
$1,159 Roundtrip, found 1 day ago
$1,159
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Sat, Aug 23 from Boston to Kumamoto, returning Tue, Sep 2, priced at $1,159 found 1 day ago
All Nippon Airways
Thu, Mar 12 - Sun, Mar 22
BOS
Boston
KMJ
Kumamoto
$1,162 Roundtrip, found 2 days ago
$1,162
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Thu, Mar 12 from Boston to Kumamoto, returning Sun, Mar 22, priced at $1,162 found 2 days ago
JetBlue Airways
Sat, Aug 23 - Tue, Sep 2
BOS
Boston
KMJ
Kumamoto
$1,314 Roundtrip, found 1 day ago
$1,314
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Aug 23 from Boston to Kumamoto, returning Tue, Sep 2, priced at $1,314 found 1 day ago
Japan Airlines
Thu, Mar 12 - Sun, Mar 22
BOS
Boston
KMJ
Kumamoto
$2,206 Roundtrip, found 2 days ago
$2,206
Roundtrip
found 2 days ago
Select Japan Airlines flight, departing Thu, Mar 12 from Boston to Kumamoto, returning Sun, Mar 22, priced at $2,206 found 2 days ago
Flights from Boston (BOS) to Kumamoto (KMJ)
Origin airport
Logan Intl.
Destination airport
Kumamoto
Airlines serving
All Nippon Airways, Japan Airlines, Qatar Airways
Roundtrip price
$1,131
Distance
7058 mi

Boston to Kumamoto Flights

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

 

The best time to book a flight from Boston to Kumamoto

Sunday is one of the best days to book for cheap flights from Boston 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 Boston 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 Boston to Kumamoto in 2025. You can also book with separate airlines for your outbound and return journeys, from $594 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 Boston 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 Boston 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 Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ) cost?
Get a cheap one-way flight from $594 or cheap return flight from $1,131 from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ)?
The cheapest month to fly from BOS to KMJ is October, when demand is low. Off-peak season is generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BOS to KMJ flight.
How many flights per day from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ)?
There aren't any daily nonstop flights from Logan Intl. Airport (BOS) 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 soaring above the clouds before you know it.
What day of the week has the most flights from BOS to KMJ?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ)?
Select a flight from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour are on average 22% more likely to be 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 Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ) last-minute?
Holding off until just before your trip to book a flight from BOS to KMJ often results in higher prices. Although you may find some last-minute deals, they're not always guaranteed. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book a BOS to KMJ flight and hotel package?
Booking a BOS to KMJ flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Kumamoto Airport (KMJ)?
If you reserved your BOS to KMJ flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

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*Available to One Key members.