BOS - KIX

$518 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 8/16. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$905
Typical prices: $1,115-$1,519
Hainan Airlines
Wed 10/14Sat 10/24
BOS - KIX • 2 stops
Cheapest one-way
$518
Typical prices: $509-$1,249
Multiple Airlines
Sun 8/16
BOS - KIX • 2 stops
Top airlines
Cheapest • from $905 (round-trip)
Best reviews • 8.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boston and Kansai Intl. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $1,568 (round-trip)
Shortest trip • 17h 35m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 32% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Kansai Intl!
Flight Deals
Booking Insights
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

Wed, Oct 14 - Sat, Oct 24
Hainan Airlines Logo
6:40 pm - 12:45 pm
BOS
-
KIX
29h 05m
2 stops
Hainan Airlines Logo
2:20 pm - 5:20 pm
KIX
-
BOS
40h 00m
1 stop
$905Hainan Airlines
Fri, Nov 20 - Sat, Nov 28
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m
2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m
1 stop
$906Hainan Airlines
Tue, Sep 15 - Wed, Nov 11
ANA Logo
9:30 am - 9:50 pm
BOS
-
KIX
23h 20m
2 stops
ANA Logo
7:05 am - 12:46 pm
KIX
-
BOS
19h 41m
2 stops
$911ANA
Sun, Sep 6 - Tue, Sep 22
ANA Logo
9:00 am - 10:20 pm
BOS
-
KIX
24h 20m
2 stops
ANA Logo
9:20 am - 10:59 pm
KIX
-
BOS
26h 39m
2 stops
$912ANA
Wed, Sep 9 - Thu, Sep 17
ANA Logo
9:30 am - 10:20 pm
BOS
-
KIX
23h 50m
2 stops
ANA Logo
4:55 pm - 10:59 pm
KIX
-
BOS
19h 04m
1 stop
$915ANA
Tue, Sep 15 - Wed, Nov 11
ANA Logo
7:44 am - 2:50 pm
BOS
-
KIX
42h 06m
1 stop
ANA Logo
7:05 am - 1:55 pm
KIX
-
BOS
20h 50m
2 stops
$916ANA
Sat, Sep 5 - Tue, Sep 22
ANA Logo
7:45 am - 2:50 pm
BOS
-
KIX
42h 05m
1 stop
ANA Logo
4:55 pm - 10:59 pm
KIX
-
BOS
19h 04m
1 stop
$920ANA
Sun, Sep 6 - Wed, Sep 23
United Airlines Logo
5:01 pm - 2:50 pm
BOS
-
KIX
32h 49m
2 stops
United Airlines Logo
4:55 pm - 10:59 pm
KIX
-
BOS
19h 04m
1 stop
$921United Airlines
Wed, Sep 9 - Tue, Sep 22
Korean Air Logo
12:55 pm - 10:40 pm
BOS
-
KIX
20h 45m
1 stop
Korean Air Logo
2:15 am - 10:10 am
KIX
-
BOS
20h 55m
1 stop
$923Korean Air
Wed, Sep 16 - Tue, Sep 22
Korean Air Logo
12:55 pm - 8:45 pm
BOS
-
KIX
18h 50m
1 stop
Korean Air Logo
2:15 am - 10:10 am
KIX
-
BOS
20h 55m
1 stop
$924Korean Air
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.

How much is a round-trip flight from Boston to Osaka Kansai Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Osaka Kansai Intl Airport departing in October.

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 February, where tickets cost $979 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,905 and $1,602 respectively.

Good to know

Low seasonDecember
Cheapest flight$518
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 8% increase in price.
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 5 days, the lowest price for a flight from Boston to Osaka Kansai Intl Airport was $518 for a one-way ticket and $905 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Boston and Osaka Kansai Intl, with oneworld 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 $1,484 and an overall rating of 8.3, ANA is the most popular choice. Cathay Pacific is also a great choice for the route, with an average price of $1,238 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.
8.3
ANAOverall score based on 1250 reviews
8.2Comfort
8.5Boarding
7.7Food
8.7Crew
7.9Entertainment
Airline reviews

Roomy airlines. Friendly staff. Timely service. Temp was warm during the flight.

8.0 ExcellentAnonymous, Jun 2026
LAX - NRT
Read more ANA reviews

Roomy airlines. Friendly staff. Timely service. Temp was warm during the flight.

On time. Convenience of a small airport. Excellent service from staff at check-in.

LAX to San Francisco under UA was sooooo stressful! Flights was delayed and no assistance from the airline to the next flight. Flew UA twice and both flights highly distressful.

The food was terrible and totally inedible. If you are flying with ANA/United bring your own food it was a long flight to be hingry

I thought I bought the ticket directly through Kayak not a 3rd party

I like that we made it faster than regularly scheduled. Everything else was poor. The boarding was slow and chaotic. One person was screaming instructions to people that didn’t understand and there was only one camera so boarding was slow. The crew was not very friendly and one stewardess was extremely rude to everyone the entire flight. The food was not good and not themed to the country we were going to like every international flight I’ve taken. Lastly the seats were awful. After this flight I would never recommend United and will actively avoid booking another flight through them.

When I checked in, it printed two bag tags. The helper said they would cancel the other. They canceled both and my bag was left behind

It was really fast to Tokyo. Much faster than the budget carriers. However a lot less space than international flights.

The ladies are great seats should be a little bigger!

Couple of hours delayed, we had to re-booked our Shinkansen reservation twice. United Aiines need to improve their time!

The plane was dirty, the seats were torn and broken, the service was the most terrible ever, the bathroom dirty, they will not even serve water you had to request it, the meals were terrible, overall less than Zero, I will never fly Cathay Pacific again.

Despite the crew's rough day, they were all very focused and friendly. The flight was too short for a meal, so no rating on that. Re. the AA app. It still isn't ready for prime time. AA works with Cathy Pacific for international flights to LA and the Aa jump to PHX. But the AA app can't find my trip and this can be problematic with flight delays and regatings at LAX.

Was not able to board flight because boarding pass name did not match passport name and no one caught it.

Had a bad experience with crew member coming back Hong Kong to la the person next to me one of the passenger have taken video and picture of crew member the person that served meal young kid late 20' s 6 5'10 had attitude at his peak anything I asked for I don't know if it was bad day or racial I felt humiliated as people could see difference towards me I no problem with Cathy and my whole family never had one was very disappointed

Frequently flyer number should and could have been put on at the time of booking as I gave the number when booking.

Very attentive crews Flight was very smooth and safe Only little disappointment was the slight delay of departure (~30 minutes ) which rarely happen with CX flights

Not at all satisfactory. I had stomach upsets after taking food. Quality of Asian vegetarian meal was awful. Further there was no snacks/ fruits/ biscuits available as in between snacks.. only peanuts and pitzels.. except courteous staff rest of my experience was far from satisfactory

Staff was very courteous. Plane was clean and quite spacious even in the last rows. Veg food could have been better.

Later on, when there was no more bottled water, the water we received had a strong chlorine/disinfectant odor. On my flight from Hong Kong to Los Angeles, there was a male flight attendant who had a mean attitude throughout the whole trip, and he was very impatient during meal service “Furthermore, we purchased a Hong Kong SIM card as part of our flight package, but we received no instructions—neither by email nor SMS—on how to activate or use it. Consequently, we were unable to use the service at all. We request a full refund, as this appears to be a deceptive charge

The crew and the food were excellent. The plane was kept quite clean.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

It was Swiss. Our kosher meals were literally frozen solid and therefore inedible, and the crew didnt care.

For the expense of first class, the seats could have been nicer and higher tier snacks would have been nice.

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

We used Kayak to reserve our tickets and specifically checked the luggage option which was a more expensive option. When we arrived at the terminal we had to pay an extra $90 per suitcase for the three passengers. This has been a pattern for the past 3 years. Why charge for a more expensive luggage option, and the ticket price not include luggage?

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

The meal options were ok but the actual food was terrible. On my return journey, they simply said that there was no vegetarian option and somehow struggled to give me dinner and did not give me any breakfast at all which in my opinion was terrible. Not having ANY vegetarian meal was surprising and never had such an experience in the recent years.

Didnt make it on flight. Flight was delayed. Then had to get rebooked for a flight that was 8 hours later. Guess who had to wait for 8 hours at the airport?

The Air Canada AC1 flight from Toronto to Tokyo on May 16 was great overall. Service, crew, food and entertainment were all excellent and everything ran smoothly. We had emergency exit seats so legroom was amazing, but the seats themselves weren’t very comfortable and the plane feels like it could use an upgrade for a long-haul flight. Aside from that, everything else was perfect.

The plane was very cramped to point there was no way not to touch person beside you and a stewardess screamed at my son when I touched her arm to get her attention to let her know she forgot to give him his dinner when she passed him and gave a dinner to passenger behind him. Very inappropriate response and She never came back to apologize and other stewardess said she was sorry “if I felt” she was inappropriate. Horrible experience and she should be reprimanded for her behavior

I bought a ticket from Kayak. When I got to the airport, the was no ticket. I had to pay 5X to get to my destination. No response received from Kayak. I will NEVER use them again.

Everything went smoothly — on-time departure and very organized boarding. We pre-ordered vegan meals, which were fine but not especially memorable. We may have had slightly higher expectations given it was a Japanese airline. It felt like a dinner meal than a breakfast. Overall, it was a good flight experience and we would recommend it.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

This flight with a lot empty place , and I have more room, feeling comfortable.

Snacks were just placed and many people were hungry and unaware they were available. Ran out of water bottles. Attendants not available. Missed entire meal.

The cabin crew was professional and there were plenty of movie choices, but the food was a bit sub-standard.

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

Information on your arrival and departure airports