Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Osaka from $431

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Osaka departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
3:35 pm - 4:25 pm
BOS
-
KIX
35h 50m
2 stops
Air Canada Logo
6:00 pm - 11:55 am
KIX
-
BOS
30h 55m
1 stop
$846Air Canada
Sat, Sep 19 - Wed, Sep 30
Air Canada Logo
3:35 pm - 4:25 pm
BOS
-
KIX
35h 50m
2 stops
Air Canada Logo
6:00 pm - 9:50 am
KIX
-
BOS
28h 50m
2 stops
$850Air Canada
Sat, Sep 19 - Wed, Sep 30
Hainan Airlines Logo
10:55 pm - 12:35 pm
BOS
-
KIX
23h 40m
1 stop
Hainan Airlines Logo
2:35 pm - 9:00 pm
KIX
-
BOS
20h 25m
1 stop
$879Hainan Airlines
Wed, Nov 11 - Sun, Nov 15
Hainan Airlines Logo
10:55 pm - 12:35 pm
BOS
-
KIX
23h 40m
1 stop
Hainan Airlines Logo
2:35 pm - 9:00 pm
KIX
-
BOS
20h 25m
1 stop
$880Hainan Airlines
Wed, Nov 11 - Wed, Nov 25
ANA Logo
5:30 am - 4:45 pm
BOS
-
KIX
21h 15m
1 stop
ANA Logo
6:45 am - 2:02 pm
KIX
-
BOS
21h 17m
2 stops
$1,051ANA
Sun, Jan 17 - Fri, Jan 29
ANA Logo
6:00 am - 4:25 pm
BOS
-
KIX
21h 25m
1 stop
ANA Logo
6:00 pm - 6:14 am
KIX
-
BOS
25h 14m
1 stop
$1,113ANA
Sat, Sep 12 - Sat, Sep 26
United Airlines Logo
5:30 am - 4:45 pm
BOS
-
KIX
21h 15m
1 stop
United Airlines Logo
6:35 pm - 1:05 am
KIX
-
BOS
20h 30m
1 stop
$1,118United Airlines
Sun, Jan 31 - Sun, Feb 21
United Airlines Logo
8:15 pm - 4:45 pm
BOS
-
KIX
30h 30m
1 stop
United Airlines Logo
6:35 pm - 11:54 pm
KIX
-
BOS
19h 19m
2 stops
$1,118United Airlines
Mon, Jan 11 - Wed, Jan 20
Cathay Pacific Logo
1:45 am - 3:10 pm
BOS
-
KIX
24h 25m
1 stop
Cathay Pacific Logo
9:25 am - 11:00 pm
KIX
-
BOS
26h 35m
1 stop
$1,164Cathay Pacific
Sun, Aug 23 - Mon, Oct 26
Cathay Pacific Logo
1:45 am - 3:10 pm
BOS
-
KIX
24h 25m
1 stop
Cathay Pacific Logo
9:05 am - 11:05 pm
KIX
-
BOS
27h 00m
1 stop
$1,164Cathay Pacific
Mon, Aug 31 - Thu, Oct 1

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Air Canada flights from Boston to Osaka Kansai Intl Airport

Our best Air Canada deals on Boston to Osaka Kansai Intl Airport flight tickets
Air Canada
Sep 19
BOS3:35 pmBoston Logan Intl
35h 50m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 30
KIX6:00 pmOsaka Kansai Intl
30h 55m
1 stop
BOS11:55 amBoston Logan Intl
$846
Air Canada
Sep 19
BOS3:35 pmBoston Logan Intl
35h 50m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 30
KIX6:00 pmOsaka Kansai Intl
28h 50m
2 stops
BOS9:50 amBoston Logan Intl
$850
Air Canada
Sep 17
BOS5:55 amBoston Logan Intl
21h 30m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 23
KIX6:00 pmOsaka Kansai Intl
17h 40m
1 stop
BOS10:40 pmBoston Logan Intl
$854

Delta flights from Boston to Osaka Kansai Intl Airport

Our best Delta deals on Boston to Osaka Kansai Intl Airport flight tickets
Delta
Aug 6
BOS6:05 amBoston Logan Intl
27h 35m
2 stops
KIX10:40 pmOsaka Kansai Intl
Aug 16
KIX12:35 pmOsaka Kansai Intl
24h 22m
2 stops
BOS11:57 pmBoston Logan Intl
$1,245
Delta
Aug 4
BOS7:45 amBoston Logan Intl
25h 55m
2 stops
KIX10:40 pmOsaka Kansai Intl
Aug 12
KIX12:35 pmOsaka Kansai Intl
24h 42m
2 stops
BOS12:17 amBoston Logan Intl
$1,389
Delta
Aug 9
BOS4:25 pmBoston Logan Intl
29h 55m
2 stops
KIX11:20 amOsaka Kansai Intl
Aug 17
KIX2:15 amOsaka Kansai Intl
32h 14m
2 stops
BOS9:29 pmBoston Logan Intl
$1,396

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Osaka Kansai Intl Airport 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, momondo users made 832,500 searches. Data last updated August 4, 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

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 9/19

3:35 pm-4:25 pm

2 stops35h 50m

Osaka Kansai Intl

Wed 9/30

6:00 pm-11:55 am

1 stop30h 55m

$846

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 9/19

3:35 pm-4:25 pm

2 stops35h 50m

Osaka Kansai Intl

Wed 9/30

6:00 pm-9:50 am

2 stops28h 50m

$850

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 11/11

10:55 pm-12:35 pm

1 stop23h 40m

Osaka Kansai Intl

Sun 11/15

2:35 pm-9:00 pm

1 stop20h 25m

$879

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 11/11

10:55 pm-12:35 pm

1 stop23h 40m

Osaka Kansai Intl

Wed 11/25

2:35 pm-9:00 pm

1 stop20h 25m

$880

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/17

5:30 am-4:45 pm

1 stop21h 15m

Osaka Kansai Intl

Fri 1/29

6:45 am-2:02 pm

2 stops21h 17m

$1,051

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 9/12

6:00 am-4:25 pm

1 stop21h 25m

Osaka Kansai Intl

Sat 9/26

6:00 pm-6:14 am

1 stop25h 14m

$1,113
Quickest round-trip

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/31

5:30 am-4:45 pm

1 stop21h 15m

Osaka Kansai Intl

Sun 2/21

6:35 pm-1:05 am

1 stop20h 30m

$1,118

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 1/11

8:15 pm-4:45 pm

1 stop30h 30m

Osaka Kansai Intl

Wed 1/20

6:35 pm-11:54 pm

2 stops19h 19m

$1,118

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 8/23

1:45 am-3:10 pm

1 stop24h 25m

Osaka Kansai Intl

Mon 10/26

9:25 am-11:00 pm

1 stop26h 35m

$1,164

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 8/31

1:45 am-3:10 pm

1 stop24h 25m

Osaka Kansai Intl

Thu 10/1

9:05 am-11:05 pm

1 stop27h 00m

$1,164

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Osaka from

How to get the cheapest flight ticket from Boston to Osaka Kansai Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, January is the cheapest month to fly from Boston to Osaka Kansai Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,021. If you aren’t able to travel during the month of January, then book flights to Osaka Kansai Intl Airport from Boston during December instead. Flights to Osaka Kansai Intl Airport in December, while not as cheap as those in January, still average around $1,034.

Can stopping save me money on Boston to Osaka Kansai Intl Airport flights?

You could potentially save up to 30% on your flight if you consider stops on a Boston to Osaka Kansai Intl Airport flight.

When to book flights from Boston to Osaka Kansai Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Osaka Kansai Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Osaka Kansai Intl Airport (BOS to KIX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Osaka Kansai Intl Airport

Fastest flight time

21h 25m

Direct flights

None
The fastest flight from Boston to Osaka Kansai Intl Airport takes 21h 25m
There are no direct flights from Boston to Osaka Kansai Intl Airport. There are no popular flight routes from Boston to Osaka Kansai Intl Airport.
Search flight deals

Frequently asked questions about flying from Boston to Osaka Kansai Intl Airport

  • How far is Boston Logan Intl to Osaka Kansai Intl by plane?

    There are 6871.6 mi between Boston Logan Intl and Osaka Kansai Intl. 21h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Osaka Kansai Intl Airport?

    Prices for flights from Boston Logan Intl Airport to Osaka Kansai Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Osaka Kansai Intl Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Osaka Kansai Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Osaka Kansai Intl Airport.

  • What documentation or ID do you need to fly to Osaka Kansai Intl Airport?

    The necessary travel and health documents for your Osaka Kansai Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Boston to Osaka Kansai Intl Airport?

Best airlines flying from Boston to Osaka Kansai Intl Airport

Compare and see reviews for airlines that fly from Boston to Osaka Kansai Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $787Free CancellationRating
7.1
11,425 reviews
Search Air Canada flights
Cathay PacificPriceFrom $833Free CancellationRating
7.6
1,436 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $920Free CancellationRating
7.4
10,059 reviews
Search United Airlines flights
ANAPriceFrom $945Free CancellationRating
8.3
1,290 reviews
Search ANA flights

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara
Izumisano
Himeji
Nishinomiya

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Osaka?

Finding the right flight to Osaka from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Osaka quick and easy, saving you time and money.

Can I find flights from Boston to Osaka with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to Osaka flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to Osaka?

Once you have performed a search for Boston to Osaka flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Osaka right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Osaka, momondo offers a useful price alert feature which will track prices for flights to Osaka from Boston and alert you when they change.

An easier way to manage your Osaka Kansai Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 9/3
Thu 9/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Osaka

Popular cities in Japan

Popular flights according to clicks in the last 7 days on momondo
Flights to Tokyo Haneda Airportfrom $644
Flights to Tokyo Narita Airportfrom $468
Flights to Osaka Itami Airportfrom $648
Flights to Nagoya Chubu Centrair Intl Airportfrom $693