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Cheap flights from Boston to Osaka from $430

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 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Hainan Airlines Logo
6:40 pm - 12:45 pm
BOS
-
KIX
29h 05m
2 stops
Hainan Airlines Logo
2:20 pm - 4:40 pm
KIX
-
BOS
39h 20m
1 stop
$873Hainan Airlines
Wed, May 6 - Sat, May 16
Hainan Airlines Logo
6:40 pm - 12:45 pm
BOS
-
KIX
29h 05m
2 stops
Hainan Airlines Logo
2:20 pm - 4:40 pm
KIX
-
BOS
39h 20m
1 stop
$965Hainan Airlines
Wed, May 6 - Sat, May 23
ANA Logo
6:00 am - 4:40 pm
BOS
-
KIX
20h 40m
1 stop
ANA Logo
6:35 pm - 12:49 am
KIX
-
BOS
20h 14m
1 stop
$976ANA
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
6:00 am - 4:40 pm
BOS
-
KIX
20h 40m
1 stop
United Airlines Logo
6:35 pm - 11:57 pm
KIX
-
BOS
19h 22m
2 stops
$980United Airlines
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
11:12 am - 9:00 am
BOS
-
KIX
32h 48m
3 stops
Multiple Airlines Logo
11:45 am - 9:49 am
KIX
-
BOS
35h 04m
3 stops
$1,022Multiple Airlines
Mon, Apr 6 - Thu, Apr 16
Multiple Airlines Logo
4:35 pm - 7:25 pm
BOS
-
KIX
36h 50m
2 stops
Multiple Airlines Logo
8:00 am - 7:42 pm
KIX
-
BOS
25h 42m
2 stops
$1,029Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
4:35 pm - 7:25 pm
BOS
-
KIX
36h 50m
2 stops
Multiple Airlines Logo
8:00 am - 10:02 am
KIX
-
BOS
40h 02m
2 stops
$1,034Multiple Airlines
Thu, Feb 19 - Wed, Feb 25
Multiple Airlines Logo
11:12 am - 9:00 am
BOS
-
KIX
32h 48m
3 stops
Multiple Airlines Logo
11:45 am - 9:49 am
KIX
-
BOS
35h 04m
3 stops
$1,035Multiple Airlines
Mon, Apr 6 - Wed, Apr 15
Multiple Airlines Logo
4:25 pm - 11:50 am
BOS
-
KIX
30h 25m
1 stop
Multiple Airlines Logo
11:45 am - 10:39 pm
KIX
-
BOS
23h 54m
2 stops
$1,041Multiple Airlines
Mon, Apr 27 - Wed, May 27
Multiple Airlines Logo
11:12 am - 9:00 am
BOS
-
KIX
32h 48m
3 stops
Multiple Airlines Logo
11:45 am - 9:49 am
KIX
-
BOS
35h 04m
3 stops
$1,049Multiple Airlines
Mon, Apr 6 - Thu, Apr 16

ANA flights from Boston to Osaka Kansai Intl Airport

Our best ANA deals on Boston to Osaka Kansai Intl Airport flight tickets
ANA
Feb 19
BOS6:00 amBoston Logan Intl
20h 40m
1 stop
KIX4:40 pmOsaka Kansai Intl
Feb 26
KIX6:35 pmOsaka Kansai Intl
20h 14m
1 stop
BOS12:49 amBoston Logan Intl
$976
ANA
Feb 15
BOS12:35 pmBoston Logan Intl
34h 50m
2 stops
KIX1:25 pmOsaka Kansai Intl
Feb 21
KIX7:00 pmOsaka Kansai Intl
40h 48m
2 stops
BOS9:48 pmBoston Logan Intl
$1,552
ANA
Feb 15
BOS6:00 amBoston Logan Intl
20h 40m
1 stop
KIX4:40 pmOsaka Kansai Intl
Feb 21
KIX9:10 pmOsaka Kansai Intl
38h 38m
2 stops
BOS9:48 pmBoston Logan Intl
$1,856

United Airlines flights from Boston to Osaka Kansai Intl Airport

Our best United Airlines deals on Boston to Osaka Kansai Intl Airport flight tickets
United Airlines
Feb 19
BOS6:00 amBoston Logan Intl
20h 40m
1 stop
KIX4:40 pmOsaka Kansai Intl
Feb 26
KIX6:35 pmOsaka Kansai Intl
19h 22m
2 stops
BOS11:57 pmBoston Logan Intl
$980
United Airlines
Feb 13
BOS9:30 amBoston Logan Intl
41h 10m
2 stops
KIX4:40 pmOsaka Kansai Intl
Feb 22
KIX6:35 pmOsaka Kansai Intl
30h 14m
2 stops
BOS10:49 amBoston Logan Intl
$1,949
United Airlines
Feb 13
BOS9:30 amBoston Logan Intl
41h 10m
2 stops
KIX4:40 pmOsaka Kansai Intl
Feb 22
KIX8:20 amOsaka Kansai Intl
27h 31m
2 stops
BOS9:51 pmBoston Logan Intl
$1,951

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 February 3, 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

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 5/6

6:40 pm-12:45 pm

2 stops29h 05m

Osaka Kansai Intl

Sat 5/16

2:20 pm-4:40 pm

1 stop39h 20m

$873

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 5/6

6:40 pm-12:45 pm

2 stops29h 05m

Osaka Kansai Intl

Sat 5/23

2:20 pm-4:40 pm

1 stop39h 20m

$965

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 2/19

6:00 am-4:40 pm

1 stop20h 40m

Osaka Kansai Intl

Thu 2/26

6:35 pm-12:49 am

1 stop20h 14m

$976

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 2/19

6:00 am-4:40 pm

1 stop20h 40m

Osaka Kansai Intl

Thu 2/26

6:35 pm-11:57 pm

2 stops19h 22m

$980

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 4/6

11:12 am-9:00 am

3 stops32h 48m

Osaka Kansai Intl

Thu 4/16

11:45 am-9:49 am

3 stops35h 04m

$1,022

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 2/19

4:35 pm-7:25 pm

2 stops36h 50m

Osaka Kansai Intl

Thu 2/26

8:00 am-7:42 pm

2 stops25h 42m

$1,029

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 2/19

4:35 pm-7:25 pm

2 stops36h 50m

Osaka Kansai Intl

Wed 2/25

8:00 am-10:02 am

2 stops40h 02m

$1,034

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 4/6

11:12 am-9:00 am

3 stops32h 48m

Osaka Kansai Intl

Wed 4/15

11:45 am-9:49 am

3 stops35h 04m

$1,035

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 4/27

4:25 pm-11:50 am

1 stop30h 25m

Osaka Kansai Intl

Wed 5/27

11:45 am-10:39 pm

2 stops23h 54m

$1,041

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 4/6

11:12 am-9:00 am

3 stops32h 48m

Osaka Kansai Intl

Thu 4/16

11:45 am-9:49 am

3 stops35h 04m

$1,049

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, February 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 $998. If you aren’t able to travel during the month of February, then book flights to Osaka Kansai Intl Airport from Boston during September instead. Flights to Osaka Kansai Intl Airport in September, while not as cheap as those in February, still average around $1,033.

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

You could potentially save up to 3% 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

22h 10m

Direct flights

None
The fastest flight from Boston to Osaka Kansai Intl Airport takes 22h 10m
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

  • 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. 22h 10m 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
10,676 reviews
Search Air Canada flights
Cathay PacificPriceFrom $909Free CancellationRating
7.6
1,155 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $979Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
ANAPriceFrom $979Free CancellationRating
8.4
1,082 reviews
Search ANA flights
Japan AirlinesPriceFrom $1,239Free CancellationRating
8.3
1,697 reviews
Search Japan Airlines flights

Traveling to a place near Osaka?

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

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