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Cheap flights from Boston to Osaka from $461

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 3/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m1 stop
$792Hainan Airlines
Wed, Jan 7 - Sat, Jan 17
Hainan Airlines Logo
6:40 pm - 12:45 pm
BOS
-
KIX
29h 05m2 stops
Hainan Airlines Logo
2:20 pm - 4:40 pm
KIX
-
BOS
39h 20m1 stop
$815Hainan Airlines
Sun, Apr 5 - Sat, Apr 11
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m1 stop
$817Hainan Airlines
Fri, Jan 9 - Sat, Jan 17
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m1 stop
$822Hainan Airlines
Fri, Jan 30 - Sat, Feb 7
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m1 stop
$823Hainan Airlines
Fri, Jan 30 - Sat, Feb 7
Korean Air Logo
11:00 am - 8:45 pm
BOS
-
KIX
19h 45m1 stop
Korean Air Logo
6:10 pm - 8:40 am
KIX
-
BOS
28h 30m1 stop
$831Korean Air
Mon, Jan 19 - Mon, Feb 2
Air Canada Logo
4:35 pm - 7:25 pm
BOS
-
KIX
36h 50m2 stops
Air Canada Logo
3:45 pm - 10:37 pm
KIX
-
BOS
20h 52m2 stops
$835Air Canada
Sun, Jan 11 - Wed, Feb 4
Multiple Airlines Logo
2:00 pm - 10:45 am
BOS
-
KIX
30h 45m2 stops
Multiple Airlines Logo
2:00 pm - 5:00 am
KIX
-
BOS
29h 00m2 stops
$854Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Hainan Airlines Logo
6:40 pm - 12:35 pm
BOS
-
KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pm
KIX
-
BOS
39h 45m1 stop
$867Hainan Airlines
Fri, Jan 9 - Tue, Jan 20
United Airlines Logo
7:07 pm - 4:40 pm
BOS
-
KIX
31h 33m2 stops
United Airlines Logo
11:00 pm - 12:46 pm
KIX
-
BOS
27h 46m3 stops
$884United Airlines
Sun, Jan 11 - Wed, Feb 4

Hainan Airlines flights from Boston to Osaka Kansai Intl Airport

Our best Hainan Airlines deals on Boston to Osaka Kansai Intl Airport flight tickets
Hainan Airlines
Jan 7
BOS6:40 pmBoston Logan Intl
27h 55m
2 stops
KIX12:35 pmOsaka Kansai Intl
Jan 17
KIX2:35 pmOsaka Kansai Intl
39h 45m
1 stop
BOS4:20 pmBoston Logan Intl
$792
Find similar
Hainan Airlines
Apr 5
BOS6:40 pmBoston Logan Intl
29h 05m
2 stops
KIX12:45 pmOsaka Kansai Intl
Apr 11
KIX2:20 pmOsaka Kansai Intl
39h 20m
1 stop
BOS4:40 pmBoston Logan Intl
$815
Find similar
Hainan Airlines
Jan 9
BOS6:40 pmBoston Logan Intl
27h 55m
2 stops
KIX12:35 pmOsaka Kansai Intl
Jan 17
KIX2:35 pmOsaka Kansai Intl
39h 45m
1 stop
BOS4:20 pmBoston Logan Intl
$817
Find similar

ANA flights from Boston to Osaka Kansai Intl Airport

Our best ANA deals on Boston to Osaka Kansai Intl Airport flight tickets
ANA
Feb 11
BOS6:00 amBoston Logan Intl
25h 50m
2 stops
KIX9:50 pmOsaka Kansai Intl
Feb 26
KIX6:35 pmOsaka Kansai Intl
39h 21m
1 stop
BOS7:56 pmBoston Logan Intl
$887
Find similar
ANA
Jan 11
BOS6:00 amBoston Logan Intl
25h 50m
2 stops
KIX9:50 pmOsaka Kansai Intl
Feb 4
KIX11:00 pmOsaka Kansai Intl
34h 51m
1 stop
BOS7:51 pmBoston Logan Intl
$902
Find similar
ANA
Jan 19
BOS5:45 amBoston Logan Intl
23h 40m
2 stops
KIX7:25 pmOsaka Kansai Intl
Feb 2
KIX9:10 pmOsaka Kansai Intl
31h 07m
2 stops
BOS2:17 pmBoston Logan Intl
$904
Find similar

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 December 11, 2025.
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 1/7

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Sat 1/17

2:35 pm-4:20 pm

1 stop39h 45m

$792

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 4/5

6:40 pm-12:45 pm

2 stops29h 05m

Osaka Kansai Intl

Sat 4/11

2:20 pm-4:40 pm

1 stop39h 20m

$815

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 1/9

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Sat 1/17

2:35 pm-4:20 pm

1 stop39h 45m

$817

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 1/30

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Sat 2/7

2:35 pm-4:20 pm

1 stop39h 45m

$822

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 1/30

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Sat 2/7

2:35 pm-4:20 pm

1 stop39h 45m

$823

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 1/19

11:00 am-8:45 pm

1 stop19h 45m

Osaka Kansai Intl

Mon 2/2

6:10 pm-8:40 am

1 stop28h 30m

$831

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

4:35 pm-7:25 pm

2 stops36h 50m

Osaka Kansai Intl

Wed 2/4

3:45 pm-10:37 pm

2 stops20h 52m

$835

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Thu 1/22

2:00 pm-10:45 am

2 stops30h 45m

Osaka Kansai Intl

Thu 1/29

2:00 pm-5:00 am

2 stops29h 00m

$854

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 1/9

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Tue 1/20

2:35 pm-4:20 pm

1 stop39h 45m

$867

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

7:07 pm-4:40 pm

2 stops31h 33m

Osaka Kansai Intl

Wed 2/4

11:00 pm-12:46 pm

3 stops27h 46m

$884

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 $1,002. 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.

What is the cheapest day to depart on your flight to Osaka Kansai Intl Airport?

The cheapest day to depart from Boston to Osaka Kansai Intl Airport is on a Wednesday. Travelers who choose to depart for Osaka Kansai Intl Airport on a Wednesday will often find tickets for as low as $1,259. Flights from Boston to Osaka Kansai Intl Airport on a Friday will generally be more expensive and average around $1,606. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Osaka Kansai Intl Airport?

Our data shows that the cheapest Boston to Osaka Kansai Intl Airport flights are usually those with departure times in the evening. Our users have found flights to Osaka Kansai Intl Airport in the evening for as low as $1,167. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $2,112 on average. Flights to Osaka Kansai Intl Airport from Boston in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You could potentially save up to 16% 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

20h 20m

Direct flights

None
The fastest flight from Boston to Osaka Kansai Intl Airport takes 20h 20m
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. 20h 20m 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
10,514 reviews
Search Air Canada flights
Cathay PacificPriceFrom $909Free CancellationRating
7.6
1,093 reviews
Search Cathay Pacific flights
ANAPriceFrom $979Free CancellationRating
8.4
1,021 reviews
Search ANA flights
United AirlinesPriceFrom $1,056Free CancellationRating
7.4
9,095 reviews
Search United 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.

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