The cheapest times to fly from KMJ to BOS are

  • January 8th to April 22nd (except the week of March 26th)
  • June 18th to July 1st
  • September 10th to October 7th
  • November 5th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from KMJ to BOS is late January. Prices can be as high as $2429 for Saturday flights during early August, or as low as $1228 for Tuesday flights around late January.


When to Fly to Boston

Flying from Kumamoto (KMJ) to Boston, MA (BOS) will usually cost between $1306 to $1999 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $1370. Due to high demand the most expensive time to fly is early August, with an average price of $2066. Planning your trip to low-cost times can easily save you $696 on economy flights and even more on first-class flights. Generally, any price below $1487 can be considered a good price for a round-trip KMJ to BOS flight.

See below for a graph of average weekly prices for the KMJ to BOS route. All prices are for round-trip tickets in USD.

KMJ to BOS Flight Prices

Compared to other flights, the KMJ to BOS flight is slightly more expensive than the average and costs about as much as the average flight leaving from Kumamoto. The average price per mile (for a direct flight) is $0.13, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $298 (17%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1455. Return trip prices are from the BOS to KMJ flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from KMJ to BOS can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 13 hour 41 minutes may not be realistic.


Flight Hacking KMJ to BOS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from KMJ to BOS — but Champion Traveler does!

Hack #1: Tokyo (KMJ > NRT > BOS)

  • Price for both tickets: $1144
  • Average savings: $344 (23.1%)

See KMJ to KIX flights

Hack #2: Osaka (KMJ > KIX > BOS)

  • Price for both tickets: $1234
  • Average savings: $254 (17.05%)

See KMJ to NRT flights

Hack #3: Hong Kong (KMJ > HKG > BOS)

  • Price for both tickets: $1326
  • Average savings: $161 (10.83%)

See KMJ to HKG flights


Flight Questions Answered

Still have questions about flying from KMJ to BOS? We’ve got answers.

Which airlines fly this route?

You can find 11 major airlines flying this route most often: Air Canada, Air France, American, ANA, Asiana, British Airways, Delta, Hawaiian, JAL, Lufthansa, Qatar Airways, and potentially more during busy seasons.

How far away is it from Logan International Airport to Kumamoto Airport?

The distance between the two airports is roughly 7058 miles or 11359 kilometers.

How long does it take to fly from KMJ to BOS?

The real-world flight time for a nonstop KMJ to BOS flight is about 13 hour 41 minutes.

How many flights go between Kumamoto and Boston, MA?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from KMJ to BOS.


Airport Location Info


Departing Airport

Origination code KMJ
Origination airport name Kumamoto Airport
City Kumamoto
Country Japan
Latitude 32.8
Longitude 130.9

Return Airport

Destination code BOS
Destination airport name Logan International Airport
City Boston, MA
Country the United States
Latitude 42.4
Longitude -71


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.