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Kansai Intl

$503+ Cheap flights from Boston (BOS) to Kansai Intl (KIX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — KIX
Jun 18 — Jun 251
Thu 6/18
Thu 6/25
1 adult, Economy
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Cheap flight deals from Boston to Kansai Intl

Cheapest flights from Boston to Kansai Intl
Explore the most affordable flight options available from Boston to Kansai Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 19, 2026.

This SmartFares deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:40 pm
BOS
-
KIX
2 stops27h 55m
Hainan Airlines
Sat 11/282:35 pm
KIX
-
BOS
1 stop39h 45m
Hainan Airlines
Deal found 5/18$912
This Justfly.com deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:40 pm
BOS
-
KIX
2 stops29h 05m
Hainan Airlines
Sat 9/192:20 pm
KIX
-
BOS
1 stop39h 20m
Hainan Airlines
Deal found 5/18$969
This KAYAK deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:40 pm
BOS
-
KIX
2 stops27h 55m
Hainan Airlines
Sat 11/282:35 pm
KIX
-
BOS
1 stop39h 45m
Hainan Airlines
Deal found 5/15$979
This SmartFares deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:40 pm
BOS
-
KIX
2 stops29h 05m
Hainan Airlines
Sat 10/102:20 pm
KIX
-
BOS
1 stop39h 20m
Hainan Airlines
Deal found 5/14$1,042
This Trip.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:40 pm
BOS
-
KIX
3 stops35h 55m
Multiple Airlines
Thu 11/127:35 am
KIX
-
BOS
2 stops46h 45m
Multiple Airlines
Deal found 5/16$1,078
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/131:45 am
BOS
-
KIX
1 stop30h 30m
Cathay Pacific
Wed 9/306:30 pm
KIX
-
BOS
1 stop41h 35m
Cathay Pacific
Deal found 5/19$1,159
This Cathay Pacific deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/61:45 am
BOS
-
KIX
1 stop30h 30m
Cathay Pacific
Wed 9/162:25 pm
KIX
-
BOS
1 stop21h 40m
Cathay Pacific
Deal found 5/18$1,189
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:45 am
BOS
-
KIX
1 stop30h 30m
Cathay Pacific
Thu 10/14:15 pm
KIX
-
BOS
2 stops43h 50m
Cathay Pacific
Deal found 5/19$1,205
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/31:45 am
BOS
-
KIX
1 stop30h 30m
Cathay Pacific
Sun 9/136:30 pm
KIX
-
BOS
1 stop41h 35m
Cathay Pacific
Deal found 5/19$1,209

Find flight deals from Boston to Kansai Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Kansai Intl (KIX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 19, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$969
(Justfly.com)

One-way from

$503
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,440
Provider with most accurate pricing for Boston Logan Intl-Osaka Kansai Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Osaka Kansai Intl flights.
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From Boston Logan Intl to Osaka Kansai Intl
Search Deals
One-way flight from Boston Logan Intl to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($219 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in May 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Kansai Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 19, 2026.
Use the filters below to find and compare flights from Boston to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 9/6

1:45 am-2:50 pm

2 stops24h 05m

Osaka Kansai Intl

Wed 9/16

2:25 pm-11:05 pm

1 stop21h 40m

$1,205

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 9/3

1:45 am-3:10 pm

1 stop24h 25m

Osaka Kansai Intl

Sun 9/13

5:35 pm-11:05 pm

1 stop42h 30m

$1,239

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 10/10

1:45 am-6:40 am

1 stop39h 55m

Osaka Kansai Intl

Sun 10/18

5:35 pm-11:05 pm

1 stop42h 30m

$1,333

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 9/28

1:45 am-2:50 pm

2 stops24h 05m

Osaka Kansai Intl

Wed 11/11

4:15 pm-10:00 pm

2 stops43h 45m

$1,360

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 9/19

1:45 am-6:40 am

1 stop39h 55m

Osaka Kansai Intl

Sat 10/3

4:15 pm-11:05 pm

2 stops43h 50m

$1,369

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 8/8

12:42 pm-11:50 am

2 stops34h 08m

Osaka Kansai Intl

Sun 8/30

6:40 pm-2:40 pm

1 stop33h 00m

$1,691

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 8/14

4:25 pm-11:50 am

1 stop30h 25m

Osaka Kansai Intl

Sat 8/22

9:05 am-2:40 pm

2 stops42h 35m

$1,724
Cheapest one-way

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 9/23

6:40 pm-12:45 pm

2 stops29h 05m

$535
Quickest one-way

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 8/5

6:00 am-2:50 pm

1 stop19h 50m

$668

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 7/13

7:25 am-5:00 pm

2 stops44h 35m

$670

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from Boston to Kansai Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Kansai Intl in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Osaka Kansai Intl Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Osaka Kansai Intl Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Boston-Osaka Kansai Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Osaka Kansai Intl Airport flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Osaka Kansai Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Kansai Intl

Have a flexible travel schedule? Discover the best time to fly to Kansai Intl from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Osaka Kansai Intl Airport

What is the cheapest month to book a flight from Boston to Osaka Kansai Intl Airport?

Currently, February is the cheapest month in which you can book a flight from Boston to Osaka Kansai Intl Airport (average of $979). Flying from Boston to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,905). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Boston to Osaka Kansai Intl Airport?

Reviews of airlines servicing Kansai Intl

Get insights into the airlines that provide service to Kansai Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kansai Intl. Reviews last updated May 19, 2026.
Get a feel of what it's like to fly with ANA,Cathay Pacific, andUnited Airlines from Boston to Osaka Kansai Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.3
Very good
1,211 reviews

Entertainment

8.0

Boarding

8.5

Comfort

8.2

Crew

8.7

Overall

8.3

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
ANA
8.3
Very good
1,211 reviews
ANA
8.3
Very good
1,211 reviews

Entertainment

8.0

Boarding

8.5

Comfort

8.2

Crew

8.7

Overall

8.3

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Cathay Pacific
7.6
Good
1,334 reviews
ANA
8.3
Very good
1,211 reviews

Entertainment

8.0

Boarding

8.5

Comfort

8.2

Crew

8.7

Overall

8.3

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
United Airlines
7.4
Good
9,733 reviews
ANA
8.3
Very good
1,211 reviews

Entertainment

8.0

Boarding

8.5

Comfort

8.2

Crew

8.7

Overall

8.3

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Air Canada
7.1
Good
11,062 reviews
ANA
8.3
Very good
1,211 reviews

Entertainment

8.0

Boarding

8.5

Comfort

8.2

Crew

8.7

Overall

8.3

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.

Related info for your journey

Find useful and relevant information for your journey from Boston to Kansai Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Osaka Kansai Intl?

    If you book a flight to Osaka Kansai Intl from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 0 flights from Logan Intl to Osaka Kansai Intl per day from 4 different airlines.

  • How long is the flight from Boston to Osaka Kansai Intl Airport?

    Departing from Boston to Osaka Kansai Intl Airport will take you 24h 05m. The distance between Boston and Osaka Kansai Intl Airport is about 6872 mi.

  • What are the cheapest airlines flying from Boston to Osaka Kansai Intl Airport round-trip?

    Flying on Air Canada is currently your cheapest option to Osaka Kansai Intl Airport, with prices starting at $787. Additional round-trip tickets that might be worth considering are offered by ANA and Cathay Pacific, with the lowest prices starting at $796 and $833, respectively. Air Canada is currently priced 43% below the average price you’ll pay for this route.

  • Can I find deals for flights from Boston to Kansai Intl that include hotel bookings?

    Yes. In addition to deals on Boston to Kansai Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Kansai Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Kansai Intl.

  • Can I find deals for business class flights from Boston to Kansai Intl?

    Yes. Cheapflights offers flight deals from Boston to Kansai Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from Boston to Osaka Kansai Intl Airport (average of $979). Flying from Boston to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,905). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Osaka Kansai Intl Airport?

Book flights to Osaka Kansai Intl Airport if you plan to visit one of these locations
Nara
Izumisano
Himeji

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Top 4 airlines flying from Boston to Kansai Intl

Discover the top 4 airlines that operate flights from Boston to Kansai Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$787Average$1,115FlexibilityNo cancel feeOn-time67%
ANACheapest$796Average$1,484FlexibilityNo cancel feeOn-time80%
Cathay PacificCheapest$833Average$1,304FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$979Average$1,519FlexibilityNo cancel feeOn-time69%

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