HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Osaka

$528+ Cheap flights from Boston (BOS) to Osaka (OSA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OSA
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Osaka with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to Osaka are usually found in November or September, booked 90 days in advance, depart on a Monday or Friday and return on a Thursday

Cheap flight deals from Boston to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Osaka (OSA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,119
(Kiwi.com)

One-way from

$528
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,316
Provider with most accurate pricing for Boston Logan Intl-Osaka (OSA) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Osaka (OSA) flights.
Search Deals
From Boston Logan Intl to Osaka (OSA)
Search Deals
One-way flight from Boston Logan Intl to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals

Find flight deals from Boston to Osaka

Cheapest flights from Boston to Osaka
Explore the most affordable flight options available from Boston to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This Cathay Pacific deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/281:40 amBOS - KIX
2 stops48h 15mCathay Pacific
Sun 10/127:35 pmKIX - BOS
1 stop40h 25mCathay Pacific
Deal found 4/30$1,081
This Air Canada deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:25 pmBOS - ITM
2 stops33h 45mAir Canada
Fri 11/212:00 pmITM - BOS
2 stops22h 37mAir Canada
Deal found 4/30$1,089
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/44:30 pmBOS - KIX
1 stop30h 10mMultiple Airlines
Tue 6/107:40 amKIX - BOS
2 stops35h 00mMultiple Airlines
Deal found 4/29$1,119
This Gurufare deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2212:55 pmBOS - UKB
1 stop39h 35mKorean Air
Mon 10/136:30 pmUKB - BOS
1 stop28h 40mKorean Air
Deal found 4/30$1,121
This Justfly.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:10 amBOS - KIX
2 stops23h 15mAir Canada
Fri 11/213:40 pmKIX - BOS
2 stops20h 57mAir Canada
Deal found 4/30$1,127
This Gurufare deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2212:55 pmBOS - KIX
1 stop33h 25mKorean Air
Mon 10/136:20 pmKIX - BOS
1 stop28h 50mKorean Air
Deal found 4/30$1,147
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:00 amBOS - KIX
1 stop19h 50mANA
Wed 11/196:30 pmKIX - BOS
1 stop17h 10mANA
Deal found 4/30$1,153
This FlightHub deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/46:05 amBOS - ITM
2 stops23h 50mANA
Tue 5/67:05 amITM - BOS
2 stops20h 14mANA
Deal found 4/30$1,177
This FlightHub deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/19:30 amBOS - UKB
2 stops23h 15mANA
Thu 5/87:05 amUKB - BOS
2 stops19h 58mANA
Deal found 4/30$1,189
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amBOS - KIX
1 stop19h 50mUnited Airlines
Thu 12/186:30 pmKIX - BOS
1 stop17h 10mUnited Airlines
Deal found 4/30$1,192
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:00 amBOS - ITM
3 stops46h 10mUnited Airlines
Thu 11/201:00 pmITM - BOS
2 stops30h 16mUnited Airlines
Deal found 4/30$1,192
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/198:15 amBOS - ITM
2 stops22h 35mJapan Airlines
Tue 11/42:50 pmITM - BOS
1 stop16h 15mJapan Airlines
Deal found 4/30$1,272

Cheapflights Fare Finder

Customize your flight search to find flights from Boston to Osaka 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, Cheapflights users made 2,558,603 searches. Data last updated May 1, 2025.
Use the filters below to find and compare flights from Boston to Osaka that are best for you.

Fly from

Boston

Fly to

Osaka

Route

Depart

Return

Price

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sun 9/28

1:40 am-2:55 pm

2 stops48h 15m

Osaka Kansai Intl

Sun 10/12

7:35 pm-11:00 pm

1 stop40h 25m

$1,081

BostonOsaka

BOS - ITM

BOSITM

Boston Logan Intl

Mon 9/22

10:20 am-6:55 pm

2 stops19h 35m

Osaka Itami

Mon 10/13

1:00 pm-10:39 pm

2 stops22h 39m

$1,117

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 6/4

4:30 pm-11:40 am

1 stop30h 10m

Osaka Kansai Intl

Tue 6/10

7:40 am-5:40 am

2 stops35h 00m

$1,119

BostonKobe

BOS - UKB

BOSUKB

Boston Logan Intl

Mon 9/22

12:55 pm-5:30 pm

1 stop39h 35m

Kobe

Mon 10/13

6:30 pm-10:10 am

1 stop28h 40m

$1,121

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Mon 9/22

12:55 pm-11:20 am

1 stop33h 25m

Osaka Kansai Intl

Mon 10/13

6:20 pm-10:10 am

1 stop28h 50m

$1,147

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Tue 9/23

6:00 am-2:50 pm

1 stop19h 50m

Osaka Kansai Intl

Wed 11/19

6:30 pm-9:40 pm

1 stop17h 10m

$1,153

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Wed 8/20

6:00 am-2:50 pm

1 stop19h 50m

Osaka Kansai Intl

Thu 12/18

6:30 pm-9:40 pm

1 stop17h 10m

$1,192

BostonKobe

BOS - UKB

BOSUKB

Boston Logan Intl

Sun 10/12

7:45 am-9:45 pm

2 stops25h 00m

Kobe

Thu 10/23

7:05 am-6:55 pm

2 stops24h 50m

$1,217

BostonOsaka

BOS - ITM

BOSITM

Boston Logan Intl

Sun 10/19

8:15 am-7:50 pm

2 stops22h 35m

Osaka Itami

Tue 11/4

2:50 pm-5:05 pm

1 stop16h 15m

$1,272

BostonOsaka

BOS - KIX

BOSKIX

Boston Logan Intl

Sat 5/17

6:20 pm-4:25 pm

2 stops33h 05m

Osaka Kansai Intl

Sat 6/28

6:05 pm-3:58 pm

2 stops34h 53m

$1,276

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 46 results
1
2
3
...
5

Compare providers for flights from Boston to Osaka

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Osaka in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Osaka flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Boston-Osaka flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Boston-Osaka flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Osaka flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Osaka flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Osaka

How far ahead should I book a flight from Boston to Osaka?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Osaka. Price data was last updated on April 25, 2025.

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to Osaka. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Boston to Osaka?

Currently, February is the cheapest month in which you can book a flight from Boston to Osaka (average of $893). Flying from Boston to Osaka in December is currently the most expensive (average of $1,336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to OSA?

Find hourly flight availability from Boston to Osaka. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

When flying from Boston to Osaka, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 25% versus a flight in the morning.

Rainfall in Osaka by month

Plan your trip to Osaka by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Osaka ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka when rainfall is around 1.6 in.

Temperature in Osaka by month

Plan your trip to Osaka by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Osaka. Reviews last updated May 1, 2025.
Peruse reviews from past customers who have flown with Korean Air, Japan Airlines and ANA from Boston to Osaka to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,068 reviews
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,459 reviews
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
852 reviews
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.2
Very good
442 reviews
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Hainan Airlines
8.1
Very good
38 reviews
Korean Air
8.4
Very good
1,068 reviews

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Boston to Osaka. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Osaka?

    Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Osaka. You should not have trouble finding flights to Osaka from Logan Intl; the airport handles an average of 0 outbound flights to Osaka per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Boston airport to Osaka. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

  • What are the cheapest airlines flying from Boston to Osaka round-trip?

    Currently priced at $1,160, ANA will fly you from Boston to Osaka and back. In addition to ANA, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Korean Air - these airlines can fly you to your destination from $1,197 and $1,219, respectively. You may be able to fly from Boston to Osaka for 12% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Boston to Osaka one-way?

    To fly one-way, consider booking your trip with Etihad Airways, which is currently one of the cheapest options available, starting at $546. Air Canada flights start at $571 while deals on Alaska Airlines start at $668 one-way.

  • What are the most popular routes from Boston to Osaka?

    Most travelers choose Boston Logan Intl - Osaka Kansai Intl, Boston Logan Intl - Osaka Itami or Boston Logan Intl - Kobe when deciding on the best route from Boston to Osaka.

  • Can I find deals for flights from Boston to Osaka that include hotel bookings?

    Yes. In addition to deals on Boston to Osaka flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Osaka?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Osaka.

  • Can I find deals for business class flights from Boston to Osaka?

    Yes. Cheapflights offers flight deals from Boston to Osaka by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Osaka?

    Currently, February is the cheapest month in which you can book a flight from Boston to Osaka (average of $893). Flying from Boston to Osaka in December is currently the most expensive (average of $1,336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Nara
Nishinomiya

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Osaka

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Kansai Intl flights
Boston to Itami flights
Hartford to Itami flights
Hartford to Kansai Intl flights

Top 6 airlines flying from Boston to Osaka

Discover the top 6 airlines that operate flights from Boston to Osaka. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Cathay PacificCheapest$867Average$1,115FlexibilityNo cancel feeOn-time72%
DeltaCheapest$867Average$968FlexibilityNo cancel feeOn-timeN/A
ANACheapest$979Average$1,458FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$1,000Average$1,433FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,051Average$1,443FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$1,239Average$1,295FlexibilityNo cancel feeOn-time79%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.