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Cheap flights from Boston to Osaka from $440

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 4/8. 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
0 bags

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Find the cheapest flights from Boston to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
1:45 am - 2:50 pm
BOS
-
KIX
24h 05m
2 stops
Cathay Pacific Logo
4:15 pm - 11:05 pm
KIX
-
BOS
43h 50m
2 stops
$1,016Cathay Pacific
Mon, Aug 31 - Thu, Oct 1
Multiple Airlines Logo
8:30 pm - 12:50 pm
BOS
-
KIX
27h 20m
2 stops
Multiple Airlines Logo
2:00 pm - 6:39 am
KIX
-
BOS
29h 39m
2 stops
$1,082Multiple Airlines
Tue, Sep 1 - Thu, Oct 1
Cathay Pacific Logo
1:45 am - 2:50 pm
BOS
-
KIX
24h 05m
2 stops
Cathay Pacific Logo
4:15 pm - 10:00 pm
KIX
-
BOS
43h 45m
2 stops
$1,090Cathay Pacific
Mon, Sep 14 - Wed, Nov 11
Multiple Airlines Logo
6:40 pm - 12:45 pm
BOS
-
KIX
29h 05m
2 stops
Multiple Airlines Logo
1:10 pm - 8:02 am
KIX
-
BOS
31h 52m
2 stops
$1,099Multiple Airlines
Fri, Sep 4 - Tue, Sep 15
Multiple Airlines Logo
8:30 pm - 12:00 pm
BOS
-
KIX
26h 30m
2 stops
Multiple Airlines Logo
1:10 pm - 6:39 am
KIX
-
BOS
30h 29m
2 stops
$1,106Multiple Airlines
Tue, Sep 1 - Thu, Oct 1
Cathay Pacific Logo
1:45 am - 9:15 pm
BOS
-
KIX
30h 30m
1 stop
Cathay Pacific Logo
1:40 pm - 11:05 pm
KIX
-
BOS
22h 25m
1 stop
$1,108Cathay Pacific
Tue, Sep 1 - Tue, Sep 15
Multiple Airlines Logo
8:30 pm - 12:50 pm
BOS
-
KIX
27h 20m
2 stops
Multiple Airlines Logo
1:10 pm - 6:39 am
KIX
-
BOS
30h 29m
2 stops
$1,112Multiple Airlines
Tue, Sep 1 - Thu, Oct 1
Cathay Pacific Logo
1:45 am - 3:10 pm
BOS
-
KIX
24h 25m
1 stop
Cathay Pacific Logo
5:35 pm - 11:05 pm
KIX
-
BOS
42h 30m
1 stop
$1,115Cathay Pacific
Mon, Sep 7 - Thu, Sep 17
Cathay Pacific Logo
1:45 am - 9:15 pm
BOS
-
KIX
30h 30m
1 stop
Cathay Pacific Logo
6:30 pm - 11:05 pm
KIX
-
BOS
41h 35m
1 stop
$1,118Cathay Pacific
Tue, Sep 8 - Thu, Sep 17
Cathay Pacific Logo
1:45 am - 2:50 pm
BOS
-
KIX
24h 05m
2 stops
Cathay Pacific Logo
1:40 pm - 11:05 pm
KIX
-
BOS
22h 25m
1 stop
$1,124Cathay Pacific
Tue, Sep 1 - Tue, Sep 15

China Eastern flights from Boston to Osaka Kansai Intl Airport

Our best China Eastern deals on Boston to Osaka Kansai Intl Airport flight tickets
China Eastern
Sep 6
BOS6:30 amBoston Logan Intl
40h 40m
2 stops
KIX12:10 pmOsaka Kansai Intl
Sep 17
KIX1:10 pmOsaka Kansai Intl
47h 48m
2 stops
BOS11:58 pmBoston Logan Intl
$1,129
China Eastern
Aug 29
BOS6:30 amBoston Logan Intl
46h 30m
2 stops
KIX6:00 pmOsaka Kansai Intl
Sep 4
KIX7:00 pmOsaka Kansai Intl
39h 11m
2 stops
BOS9:11 pmBoston Logan Intl
$1,184

STARLUX Airlines flights from Boston to Osaka Kansai Intl Airport

Our best STARLUX Airlines deals on Boston to Osaka Kansai Intl Airport flight tickets
STARLUX Airlines
Sep 15
BOS4:45 pmBoston Logan Intl
30h 30m
2 stops
KIX12:15 pmOsaka Kansai Intl
Nov 11
KIX2:00 pmOsaka Kansai Intl
32h 02m
2 stops
BOS8:02 amBoston Logan Intl
$1,139
STARLUX Airlines
Mar 25
BOS7:15 amBoston Logan Intl
40h 35m
2 stops
KIX12:50 pmOsaka Kansai Intl
Apr 3
KIX3:10 pmOsaka Kansai Intl
28h 29m
2 stops
BOS6:39 amBoston Logan Intl
$2,221

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 March 21, 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

Mon 8/31

1:45 am-2:50 pm

2 stops24h 05m

Osaka Kansai Intl

Thu 10/1

4:15 pm-11:05 pm

2 stops43h 50m

$1,016

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/1

8:30 pm-12:50 pm

2 stops27h 20m

Osaka Kansai Intl

Thu 10/1

2:00 pm-6:39 am

2 stops29h 39m

$1,082

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 9/14

1:45 am-2:50 pm

2 stops24h 05m

Osaka Kansai Intl

Wed 11/11

4:15 pm-10:00 pm

2 stops43h 45m

$1,090

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 9/4

6:40 pm-12:45 pm

2 stops29h 05m

Osaka Kansai Intl

Tue 9/15

1:10 pm-8:02 am

2 stops31h 52m

$1,099

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/1

8:30 pm-12:00 pm

2 stops26h 30m

Osaka Kansai Intl

Thu 10/1

1:10 pm-6:39 am

2 stops30h 29m

$1,106

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/1

1:45 am-9:15 pm

1 stop30h 30m

Osaka Kansai Intl

Tue 9/15

1:40 pm-11:05 pm

1 stop22h 25m

$1,108

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/1

8:30 pm-12:50 pm

2 stops27h 20m

Osaka Kansai Intl

Thu 10/1

1:10 pm-6:39 am

2 stops30h 29m

$1,112

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 9/7

1:45 am-3:10 pm

1 stop24h 25m

Osaka Kansai Intl

Thu 9/17

5:35 pm-11:05 pm

1 stop42h 30m

$1,115

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/8

1:45 am-9:15 pm

1 stop30h 30m

Osaka Kansai Intl

Thu 9/17

6:30 pm-11:05 pm

1 stop41h 35m

$1,118
Quickest round-trip

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/1

1:45 am-2:50 pm

2 stops24h 05m

Osaka Kansai Intl

Tue 9/15

1:40 pm-11:05 pm

1 stop22h 25m

$1,124

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 typical price of a round-trip flight between Boston and Osaka Kansai Intl Airport?

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

In general, September 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 $794. If you aren’t able to travel during the month of September, then book flights to Osaka Kansai Intl Airport from Boston during February instead. Flights to Osaka Kansai Intl Airport in February, while not as cheap as those in September, still average around $979.

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

You could potentially save up to 31% 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

19h 50m

Direct flights

None
The fastest flight from Boston to Osaka Kansai Intl Airport takes 19h 50m
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. 19h 50m 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
10,818 reviews
Search Air Canada flights
Cathay PacificPriceFrom $833Free CancellationRating
7.6
1,221 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $979Free CancellationRating
7.4
9,455 reviews
Search United Airlines flights
ANAPriceFrom $1,034Free CancellationRating
8.4
1,135 reviews
Search ANA flights
Japan AirlinesPriceFrom $1,239Free CancellationRating
8.3
1,742 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
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

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