$700 Cheap Flights from Boston (BOS) to Kumamoto (KMJ)

View $700 flight on Sat, Nov 15, 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 $700 for one-way flights and $1,035 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$1,035 Roundtrip, found 3 days ago
$1,035
Roundtrip
found 3 days ago
Select Air Canada flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $1,035 found 3 days ago
All Nippon Airways
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$1,085 Roundtrip, found 3 days ago
$1,085
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $1,085 found 3 days ago
All Nippon Airways
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$1,205 Roundtrip, found 3 days ago
$1,205
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $1,205 found 3 days ago
All Nippon Airways
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$1,245 Roundtrip, found 3 days ago
$1,245
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $1,245 found 3 days ago
Air Canada
Tue, Nov 18 - Wed, Dec 24
BOS
Boston
KMJ
Kumamoto
$1,352 Roundtrip, found 20 hours ago
$1,352
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Nov 18 from Boston to Kumamoto, returning Wed, Dec 24, priced at $1,352 found 20 hours ago
Air Canada
Tue, Nov 18 - Wed, Dec 24
BOS
Boston
KMJ
Kumamoto
$1,405 Roundtrip, found 20 hours ago
$1,405
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Nov 18 from Boston to Kumamoto, returning Wed, Dec 24, priced at $1,405 found 20 hours ago
JetBlue Airways
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$1,415 Roundtrip, found 3 days ago
$1,415
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $1,415 found 3 days ago
Cathay Pacific
Tue, Nov 18 - Wed, Dec 24
BOS
Boston
KMJ
Kumamoto
$1,418 Roundtrip, found 20 hours ago
$1,418
Roundtrip
found 20 hours ago
Select Cathay Pacific flight, departing Tue, Nov 18 from Boston to Kumamoto, returning Wed, Dec 24, priced at $1,418 found 20 hours ago
Air Canada
Tue, Nov 18 - Wed, Dec 24
BOS
Boston
KMJ
Kumamoto
$1,507 Roundtrip, found 20 hours ago
$1,507
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Nov 18 from Boston to Kumamoto, returning Wed, Dec 24, priced at $1,507 found 20 hours ago
Qatar Airways
Wed, Dec 3 - Thu, Dec 18
BOS
Boston
KMJ
Kumamoto
$2,301 Roundtrip, found 3 days ago
$2,301
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Wed, Dec 3 from Boston to Kumamoto, returning Thu, Dec 18, priced at $2,301 found 3 days ago

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 $700 or cheap return flight from $1,035 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 December, 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.

Travel information

Origin airport
Logan Intl.
Destination airport
Kumamoto
Roundtrip price
$1,035
Distance
7058 mi

Book with confidence

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 December. 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 $700 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.

 

Boston to Kumamoto Flights

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*Available to One Key members.