BOS - KIX

$515 Find Cheap Flights from Boston to Osaka Kansai Intl

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Kansai Intl departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Osaka Kansai Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Osaka, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Osaka, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Boston to Kansai Intl (BOS-KIX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Kansai Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Kansai Intl

Tue, Oct 14 - Wed, Oct 22
Cathay Pacific Logo
1:40 am - 9:15 pmBOS-KIX
30h 35m1 stop
Cathay Pacific Logo
7:35 pm - 11:00 pmKIX-BOS
40h 25m1 stop
$951Cathay Pacific
Find Deal
Fri, Oct 31 - Tue, Nov 11
Cathay Pacific Logo
1:30 am - 5:50 pmBOS-KIX
27h 20m1 stop
Cathay Pacific Logo
10:00 am - 10:00 pmKIX-BOS
26h 00m1 stop
$955Cathay Pacific
Find Deal
Mon, Jan 5 - Tue, Feb 17
ANA Logo
5:20 am - 9:50 pmBOS-KIX
26h 30m2 stops
ANA Logo
7:05 am - 2:24 pmKIX-BOS
21h 19m2 stops
$956ANA
Find Deal
Thu, Jan 29 - Mon, Feb 16
ANA Logo
5:45 am - 6:15 pmBOS-KIX
22h 30m2 stops
ANA Logo
9:10 pm - 2:23 pmKIX-BOS
31h 13m2 stops
$1,004ANA
Find Deal
Mon, Jan 5 - Tue, Feb 17
Multiple Airlines Logo
6:00 am - 4:40 pmBOS-KIX
20h 40m1 stop
Multiple Airlines Logo
11:05 am - 8:16 pmKIX-BOS
23h 11m2 stops
$1,012Multiple Airlines
Find Deal
Sun, Feb 22 - Thu, Feb 26
Air Canada Logo
6:55 pm - 7:25 pmBOS-KIX
34h 30m2 stops
Air Canada Logo
3:45 pm - 10:37 pmKIX-BOS
20h 52m2 stops
$1,028Air Canada
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Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
6:17 am - 6:50 pmBOS-KIX
23h 33m2 stops
Multiple Airlines Logo
5:50 pm - 12:40 amKIX-BOS
20h 50m2 stops
$1,037Multiple Airlines
Find Deal
Sat, Nov 1 - Mon, Nov 10
Air Canada Logo
6:40 pm - 5:40 pmBOS-KIX
34h 00m2 stops
Air Canada Logo
7:25 pm - 9:32 amKIX-BOS
28h 07m2 stops
$1,053Air Canada
Find Deal
Tue, Jan 6 - Sat, Jan 17
United Airlines Logo
5:57 pm - 4:40 pmBOS-KIX
32h 43m1 stop
United Airlines Logo
6:35 pm - 9:42 pmKIX-BOS
17h 07m1 stop
$1,069United Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 9
United Airlines Logo
6:17 pm - 4:40 pmBOS-KIX
32h 23m2 stops
United Airlines Logo
6:35 pm - 9:42 pmKIX-BOS
17h 07m1 stop
$1,075United Airlines
Find Deal

Everything you should know

Top airlines
Cathay Pacific
Cheapest • from $951 (round-trip)
ANA
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 28% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$951
Overall average: $1,211
Cathay Pacific
Tue 10/14Wed 10/22
BOS - KIX • 1 stop
Cheapest one-way
$515
Typical prices: $562-749
Hainan Airlines
Fri 10/3
BOS - KIX • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Kansai Intl!
Booking Insights

KAYAK's insights & trends for Boston to Kansai Intl flights

Get data-powered insights and trends into flights from Boston to Kansai Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to Osaka Kansai Intl?

The average price of all round-trip flights from Boston to Osaka Kansai Intl Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Osaka Kansai Intl on a Wednesday and more expensive on a Friday. On your return trip to Boston, you should consider flying back on a Thursday, and avoid Fridays for better deals.

What is the cheapest month to fly from Boston to Osaka Kansai Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Osaka Kansai Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Osaka Kansai Intl Airport is September, where tickets cost $938 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $1,759 and $1,672 respectively.

Good to know

Low seasonAugust
Cheapest flight$515
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 28% lower on average.
Flight from Boston to Osaka Kansai Intl

When to book flights from Boston to Kansai Intl

Are your dates flexible? Find out the best times to travel from Boston to Kansai Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to Osaka Kansai Intl flights

  • What is the cheapest flight from Boston to Osaka Kansai Intl Airport?

    In the last 3 days, the lowest price for a flight from Boston to Osaka Kansai Intl Airport was $515 for a one-way ticket and $951 for a round-trip.

  • Do I need a passport to fly between Boston and Osaka Kansai Intl?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Boston and on arrival in Osaka Kansai Intl.

  • Which aircraft models fly most regularly from Boston to Osaka Kansai Intl?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Osaka Kansai Intl?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Boston and Osaka Kansai Intl, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Boston to Osaka, ANA or Cathay Pacific?

    The two airlines most popular with KAYAK users for flights from Boston to Osaka are ANA and Cathay Pacific. With an average price for the route of $1,289 and an overall rating of 8.4, ANA is the most popular choice. Cathay Pacific is also a great choice for the route, with an average price of $1,226 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Boston to Osaka Kansai Intl?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Osaka Kansai Intl.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Osaka Kansai Intl?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Osaka Kansai Intl from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Osaka Kansai Intl?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Osaka Kansai Intl with an airline and back to Boston with another airline. Booking your flights between Boston and KIX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Osaka Kansai Intl?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Osaka Kansai Intl from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Boston to Kansai Intl

 
See real verified KAYAK customer reviews for airlines flying from Boston to Osaka. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Kansai Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
ANAOverall score based on 964 reviews
8.6Boarding
8.7Crew
7.7Food
8.2Comfort
7.9Entertainment
Airline reviews

Everything was excellent. Only the fish entree in the Japanese meal was overcooked and quite dry but everything else was great

10.0 Excellentmichael, Sep 2025LHR - HND
Read more ANA reviews

Everything was excellent. Only the fish entree in the Japanese meal was overcooked and quite dry but everything else was great

Great first time experience on this airline. Very professional staff and great service.

Warm the bread. Movies: better choices to include Chinese movies options or some of the older winners of flim festival

I was able to change my flight last minute. It was more expensive, but that was my fault. Thank you for allowing me to fly!

Business class on ANA was awesome. There lie flat seats made it easier to sleep on a 12 hour flight. Food was great and service was excellent.

The crew was very nice and polite. They made sure everybody got their meal and drinks. Even the economy class had a very adequate leg room for someone that is over 6 foot tall.

Overall it was good. Making changes to the reservation on ANA’s website was little challenging. Would like to see those features improved in the future.

The flight crew was outstanding. Very cheerful and always respectful. I wish the same could be said about United. The AC wasn't the best on the plane.

The seats are uncomfortable. The flight attendants are not pleasant. They do their job, but not with a ray of sunshine and warmth. The food was awful, not what I would expect from an Asian airline. All of the other Asian airlines I have flown have far better food. The food was on par with United airlines food, which is really bad. Maybe ANA should get out of the alliance with United.

During booking, I selected the seats so that my wife and I would sit next to each other. However, the airline changed our seats at boarding so that we were seated apart. Very disappointing.

Great entertainment system, the seat is a bit old style needs refurbishment

Boarding at the airport was not well managed. Otherwise, had a good flight sitting in the first row (which I paid for). Crew was pretty friendly, and flight was smooth.

I am Vegetarian also has Gluten free food. However they gave me chicken and fish which is gluten free, but i am a vegetrain and i requested crew Hindu meal vegetarian, they said they will come back. .but they never showed up even i asked 2nd time. They could have compensate. I also request airline industry to have another option Gluten Free for Vegetarin people as well. Because Vegetarin people will have gluen issue...

I was only given 2 meals, and my screen showed that there were 3 meals. Second meal was 1-2 hours late according to the screen.

The economy seats are incredibly tight. A large percent of the traveling public will not fit. I will not fly Cathay again because of this. You are literally squeezing passengers for profit. The CEO should fly some economy flights.

I've stomach problems after 2 hours of flight, Iris, the flight purser not only did her best to make me feel comfortable, she went above and beyond providing pain relievers medicines and ointment. She look and found a doctor passenger on the flight to provide advise. She even report on ground staffs about my condition and provide wheelchair upon arrival. Kudos to her and Cathay Pacific!

Crew was great. But a bit understaffed. The business class seat, etc were dated. But comfortable. Some legs had entertainment system from a decade ago. Selections were rather poor. Food was mediocre at best. Actually poor for business class standards. I liked the lounge in Hong Kong. Showers were great. Food was nice.

Everything was fine and I have no complaints or things to note.

Highly impressive. On time. Smooth and fast boarding and disembarkment. Really great service

Overall, it was ok. However, the food was very sub-par.

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Not to out myself as both a child at heart and kind of a terrible person, but the Pokémon safety video was the first time I watched an airplane safety video in like a decade. It was ADORABLE!! A great way to encourage attention from young and old alike.

I had a good experience. I liked being informed about the status of my luggage

Seamless! Long but the seat back entertainment kept us all busy the whole time! Meals were excellent! Crew fantastic! Very attentive!

The whole experience what excellent, from Anjou at the ticket counter to the attendants on the flight. Although it was an older plane, it was a very good flight. One of the best flights I have had on Air Canada!

The staff could have been friendlier. And Having the flight on time would have been much more convenient.

Old, noisy plane, bad coffee, delayed. Flight attendant was very nice.

We boarded 1.5 hours late. Long wait for the bags when we got to Mexico City. Long wait to get on plane with people mover truck. Friendly staff. They answered all questions as best the could. Such a long, long walk from the plane to customs. Thank you, Michael A. Burris Cambridge, Massachusetts USA

Economy middle seat was so narrow that I could not sit back comfortably with passengers on either side of me. Over the 9-hour flight, with my body slightly twisted most of that time, my previously-healthy left knee became very painful, even though I got up to walk multiple times. The knee is still painful 3 weeks later. Otherwise, it was a nice flight, but I was crippled over my entire vacation.

Dealing with Air Canada was totally miserable and as a result of their website incompetence, lack of customer support, and total non-responsiveness we could not use this flight. We have made a formal complaint to Air Canada and are waiting to hear back, but if prior experience (more than one hour waits on the telephone with no response) is any guide, we wonder if we will ever hear back at all.

Everything you need to know for your flight from Boston to Kansai Intl

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