BOS - KIX

$387 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 1/6. 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
$966
Overall average: $1,284
Cathay Pacific
Sun 1/11Mon 1/26
BOS - KIX • 1 stop
Cheapest one-way
$387
Typical prices: $648-$896
Multiple Airlines
Tue 1/6
BOS - KIX • 3 stops
Top airlines
Cathay Pacific
Cheapest • from $966 (round-trip)
ANA
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 22% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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!
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

Sun, Jan 11 - Mon, Jan 26
Cathay Pacific Logo
12:30 am - 3:15 pmBOS-KIX
24h 45m1 stop
Cathay Pacific Logo
10:00 am - 10:00 pmKIX-BOS
26h 00m1 stop
$966Cathay Pacific
Find Deal
Sun, Mar 8 - Thu, Mar 12
Cathay Pacific Logo
1:30 am - 12:45 pmBOS-KIX
22h 15m1 stop
Cathay Pacific Logo
9:25 am - 11:00 pmKIX-BOS
26h 35m1 stop
$975Cathay Pacific
Find Deal
Wed, Dec 3 - Wed, Dec 10
Multiple Airlines Logo
6:15 am - 10:20 pmBOS-KIX
26h 05m2 stops
Multiple Airlines Logo
3:45 pm - 12:12 pmKIX-BOS
34h 27m2 stops
$982Multiple Airlines
Find Deal
Sun, Jan 11 - Mon, Jan 26
Cathay Pacific Logo
12:30 am - 2:55 pmBOS-KIX
24h 25m2 stops
Cathay Pacific Logo
10:00 am - 10:00 pmKIX-BOS
26h 00m1 stop
$983Cathay Pacific
Find Deal
Sat, Jan 31 - Sat, Feb 14
Multiple Airlines Logo
6:44 pm - 6:45 pmBOS-KIX
34h 01m2 stops
Multiple Airlines Logo
2:35 pm - 4:20 pmKIX-BOS
39h 45m1 stop
$1,004Multiple Airlines
Find Deal
Sat, Jan 31 - Mon, Feb 16
Korean Air Logo
11:00 am - 12:50 pmBOS-KIX
35h 50m1 stop
Korean Air Logo
6:10 pm - 8:40 amKIX-BOS
28h 30m1 stop
$1,116Korean Air
Find Deal
Mon, Jan 12 - Mon, Jan 26
United Airlines Logo
6:21 pm - 4:40 pmBOS-KIX
32h 19m2 stops
United Airlines Logo
6:35 pm - 9:42 pmKIX-BOS
17h 07m1 stop
$1,118United Airlines
Find Deal
Sat, Jan 31 - Sat, Feb 14
United Airlines Logo
5:57 pm - 4:40 pmBOS-KIX
32h 43m1 stop
United Airlines Logo
6:35 pm - 12:49 amKIX-BOS
20h 14m1 stop
$1,127United Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 20
Air Canada Logo
4:35 pm - 7:25 pmBOS-KIX
36h 50m2 stops
Air Canada Logo
3:45 pm - 10:37 pmKIX-BOS
20h 52m2 stops
$1,131Air Canada
Find Deal
Fri, Jan 30 - Sat, Feb 7
Korean Air Logo
11:00 am - 5:00 pmBOS-KIX
40h 00m1 stop
Korean Air Logo
6:10 pm - 8:40 amKIX-BOS
28h 30m1 stop
$1,166Korean Air
Find Deal
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 $1,033 (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$387
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 9% 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 $387 for a one-way ticket and $966 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 $1,255 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 $1,294 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 1003 reviews
8.2Comfort
8.7Crew
8.6Boarding
7.7Food
7.9Entertainment
Airline reviews

Great experienced staff and very pleasant compared to some other international airlines

10.0 ExcellentAshok, Nov 2025OKA - HND
Read more ANA reviews

Great experienced staff and very pleasant compared to some other international airlines

Flight was good and comfortable, even for long haul economy. No complaints.

Check in was fast, lounge was good. Special section for ANA passengers in the Plaza Premium lounge. Boarding was organized and quick. Crew was very nice. They ran out of the Japanese meal so they asked me to switch to the international meal. Beef was room temperature and not hot. It tasted ok. Japanese meal was served hot. Movies were not great. Chair was very old and recline was not good. TV monitor was very old and not HD. Plane layout in business was 2-2-2. Should switch to the 1-2-1 layout for more privacy. Overall flight was average to good. Service was good but hard product should be updated to compete against much nicer Taiwanese airlines.

They lost my luggage on the inbound flight and then lost it again on this flight. I called online travel agent to change earlier flight to get a longer layover in Vancouver but ANA denied it

Suite lounge in Honolulu is very exclusive and boarding from the lounge into the plane is unique. First suites were huge and comfortable. Japanese meal is like a high end omakase meal. All the staff were very kind and provided sophisticated service. Fast Track upon landing was appreciated but not needed this time because immigration was so empty and easy.

I like the service very much. The food just okay but maybe different culture who like, who don't like.

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!

Leg room wasn't that great. Other than that it was a good flight

Issues: 1) the charging issue as described in my previous survey 2) when I requested diet coke during the breakfast time, it is not available. Why? I can't drink diet coke in the morning? 3) when I tried to transfer to this flight, its gate information was not available to me?

The lead business class attendant was excellent. Made a point of greeting you and knowing your name by the time you leave.

Seats in the absolute back row of the plane even though we booked ages ago :( Crew was awesome though

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...

they are deley vancouver to hankong 3 hour after honkong 20 hour stay there honkong not visa approved and they cant help to visa so we are stay in airport 20 hour even honkong staf very bad person they cant do for us 6 hour we arround they said you there you go there waste time next time i dont want to go cathay stay in honkong

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.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.

Premium Plus is a really good idea for longer flights

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

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.

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

The flight was delayed an hour, but not because of Air Canada. The crew was polite, professional, and competent. The food was above average for Air Canada, but just fine. The stand out for me in the 10 hour flight was the entertainment package. The best of any airline I’ve experienced so far. Looking forward to my return flight to finish some more of the shows I was watching.

Very good!👍!especially the typhoon coming, the speaking Chinese language service is excellent 👍!

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.

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

Information on your arrival and departure airports