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Cheap flights from Boston to Osaka from $505

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 11/19. 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

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Hainan Airlines Logo
6:40 pm - 12:35 pmBOS-KIX
27h 55m2 stops
Hainan Airlines Logo
2:35 pm - 4:20 pmKIX-BOS
39h 45m1 stop
$876Hainan Airlines
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Sun, Jan 11 - Thu, Feb 5
Cathay Pacific Logo
12:30 am - 5:50 pmBOS-KIX
27h 20m1 stop
Cathay Pacific Logo
4:55 pm - 10:00 pmKIX-BOS
43h 05m1 stop
$966Cathay Pacific
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Wed, Jan 21 - Sun, Jan 25
Cathay Pacific Logo
12:30 am - 3:15 pmBOS-KIX
24h 45m1 stop
Cathay Pacific Logo
6:05 pm - 10:00 pmKIX-BOS
41h 55m1 stop
$967Cathay Pacific
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Sun, Jan 11 - Mon, Jan 26
ANA Logo
6:00 am - 7:25 pmBOS-KIX
23h 25m2 stops
ANA Logo
11:05 am - 7:56 pmKIX-BOS
22h 51m2 stops
$974ANA
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Sun, Jan 11 - Fri, Feb 13
Air Canada Logo
7:55 pm - 7:25 pmBOS-KIX
33h 30m2 stops
Air Canada Logo
3:45 pm - 10:37 pmKIX-BOS
20h 52m2 stops
$983Air Canada
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Sun, Jan 11 - Thu, Feb 5
Multiple Airlines Logo
6:15 am - 10:20 pmBOS-KIX
26h 05m2 stops
Multiple Airlines Logo
3:00 pm - 10:37 pmKIX-BOS
21h 37m2 stops
$1,023Multiple Airlines
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Fri, Dec 5 - Wed, Dec 24
Multiple Airlines Logo
12:30 am - 2:55 pmBOS-KIX
24h 25m2 stops
Multiple Airlines Logo
8:00 am - 12:40 amKIX-BOS
30h 40m3 stops
$1,047Multiple Airlines
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Sun, Jan 11 - Mon, Jan 26
United Airlines Logo
6:17 pm - 4:40 pmBOS-KIX
32h 23m2 stops
United Airlines Logo
6:35 pm - 12:49 amKIX-BOS
20h 14m1 stop
$1,068United Airlines
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Sun, Jan 11 - Fri, Feb 13
ANA Logo
6:00 am - 9:50 pmBOS-KIX
25h 50m2 stops
ANA Logo
6:35 pm - 9:42 pmKIX-BOS
17h 07m1 stop
$1,092ANA
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Mon, Jan 12 - Mon, Jan 26
United Airlines Logo
9:30 am - 4:40 pmBOS-KIX
41h 10m2 stops
United Airlines Logo
6:35 pm - 9:42 pmKIX-BOS
17h 07m1 stop
$1,118United Airlines
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Mon, Jan 12 - Mon, Jan 26

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 11
BOS6:40 pmBoston Logan Intl
27h 55m
2 stops
KIX12:35 pmOsaka Kansai Intl
Feb 5
KIX2:35 pmOsaka Kansai Intl
39h 45m
1 stop
BOS4:20 pmBoston Logan Intl
$876
Find similar
Hainan Airlines
Dec 7
BOS6:40 pmBoston Logan Intl
27h 55m
2 stops
KIX12:35 pmOsaka Kansai Intl
Dec 23
KIX2:35 pmOsaka Kansai Intl
39h 45m
1 stop
BOS4:20 pmBoston Logan Intl
$1,061
Find similar

Cathay Pacific flights from Boston to Osaka Kansai Intl Airport

Our best Cathay Pacific deals on Boston to Osaka Kansai Intl Airport flight tickets
Cathay Pacific
Jan 21
BOS12:30 amBoston Logan Intl
27h 20m
1 stop
KIX5:50 pmOsaka Kansai Intl
Jan 25
KIX4:55 pmOsaka Kansai Intl
43h 05m
1 stop
BOS10:00 pmBoston Logan Intl
$966
Find similar
Cathay Pacific
Jan 11
BOS12:30 amBoston Logan Intl
24h 45m
1 stop
KIX3:15 pmOsaka Kansai Intl
Jan 26
KIX6:05 pmOsaka Kansai Intl
41h 55m
1 stop
BOS10:00 pmBoston Logan Intl
$967
Find similar
Cathay Pacific
Nov 10
BOS12:30 amBoston Logan Intl
24h 45m
1 stop
KIX3:15 pmOsaka Kansai Intl
Dec 4
KIX9:25 amOsaka Kansai Intl
26h 35m
1 stop
BOS10:00 pmBoston Logan Intl
$990
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 October 30, 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

Sun 1/11

6:40 pm-12:35 pm

2 stops27h 55m

Osaka Kansai Intl

Thu 2/5

2:35 pm-4:20 pm

1 stop39h 45m

$876

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 1/21

12:30 am-5:50 pm

1 stop27h 20m

Osaka Kansai Intl

Sun 1/25

4:55 pm-10:00 pm

1 stop43h 05m

$966

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

12:30 am-3:15 pm

1 stop24h 45m

Osaka Kansai Intl

Mon 1/26

6:05 pm-10:00 pm

1 stop41h 55m

$967

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

6:00 am-7:25 pm

2 stops23h 25m

Osaka Kansai Intl

Fri 2/13

11:05 am-7:56 pm

2 stops22h 51m

$974

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

7:55 pm-7:25 pm

2 stops33h 30m

Osaka Kansai Intl

Thu 2/5

3:45 pm-10:37 pm

2 stops20h 52m

$983

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Fri 12/5

6:15 am-10:20 pm

2 stops26h 05m

Osaka Kansai Intl

Wed 12/24

3:00 pm-10:37 pm

2 stops21h 37m

$1,023

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

12:30 am-2:55 pm

2 stops24h 25m

Osaka Kansai Intl

Mon 1/26

8:00 am-12:40 am

3 stops30h 40m

$1,047

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 1/11

6:17 pm-4:40 pm

2 stops32h 23m

Osaka Kansai Intl

Fri 2/13

6:35 pm-12:49 am

1 stop20h 14m

$1,068

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 1/12

6:00 am-9:50 pm

2 stops25h 50m

Osaka Kansai Intl

Mon 1/26

6:35 pm-9:42 pm

1 stop17h 07m

$1,092

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 1/12

9:30 am-4:40 pm

2 stops41h 10m

Osaka Kansai Intl

Mon 1/26

6:35 pm-9:42 pm

1 stop17h 07m

$1,118

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $1,033. 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 $1,051.

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 9% 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

Direct flights

None
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.
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  • 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 45m 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
10,377 reviews
Search Air Canada flights
Cathay PacificPriceFrom $940Free CancellationRating
7.6
1,044 reviews
Search Cathay Pacific flights
ANAPriceFrom $979Free CancellationRating
8.4
996 reviews
Search ANA flights
United AirlinesPriceFrom $1,056Free CancellationRating
7.4
8,998 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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