$425 Cheap Flights from Boston (BOS) to Osaka (KIX)

View $425 flight on Fri, Feb 6, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Kansai Intl. Airport (KIX)

Cheap Flights from Boston to Osaka (BOS-KIX)

Prices were available within the past 7 days and start at $425 for one-way flights and $797 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hainan Airlines
Sun, Jan 18 - Tue, Jan 27
BOS
Boston
KIX
Osaka
$797 Roundtrip, found 6 hours ago
$797
Roundtrip
found 6 hours ago
Select Hainan Airlines flight, departing Sun, Jan 18 from Boston to Osaka, returning Tue, Jan 27, priced at $797 found 6 hours ago
Air Canada
Mon, Feb 16 - Thu, Feb 26
BOS
Boston
KIX
Osaka
$835 Roundtrip, found 22 hours ago
$835
Roundtrip
found 22 hours ago
Select Air Canada flight, departing Mon, Feb 16 from Boston to Osaka, returning Thu, Feb 26, priced at $835 found 22 hours ago
United
Tue, Feb 17 - Wed, Feb 25
BOS
Boston
KIX
Osaka
$879 Roundtrip, found 8 hours ago
$879
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Feb 17 from Boston to Osaka, returning Wed, Feb 25, priced at $879 found 8 hours ago
Korean Air
Sun, Jan 18 - Tue, Jan 27
BOS
Boston
KIX
Osaka
$893 Roundtrip, found 6 hours ago
$893
Roundtrip
found 6 hours ago
Select Korean Air flight, departing Sun, Jan 18 from Boston to Osaka, returning Tue, Jan 27, priced at $893 found 6 hours ago
All Nippon Airways
Wed, Dec 31 - Thu, Jan 22
BOS
Boston
KIX
Osaka
$897 Roundtrip, found 2 days ago
$897
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Wed, Dec 31 from Boston to Osaka, returning Thu, Jan 22, priced at $897 found 2 days ago
Cathay Pacific
Wed, Mar 4 - Wed, Mar 11
BOS
Boston
KIX
Osaka
$990 Roundtrip, just found
$990
Roundtrip
just found
Select Cathay Pacific flight, departing Wed, Mar 4 from Boston to Osaka, returning Wed, Mar 11, priced at $990 just found
Alaska Airlines
Mon, Jan 12 - Wed, Jan 21
BOS
Boston
KIX
Osaka
$1,044 Roundtrip, found 1 day ago
$1,044
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Jan 12 from Boston to Osaka, returning Wed, Jan 21, priced at $1,044 found 1 day ago
Delta
Mon, Mar 30 - Wed, Apr 15
BOS
Boston
KIX
Osaka
$1,252 Roundtrip, found 6 days ago
$1,252
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Mar 30 from Boston to Osaka, returning Wed, Apr 15, priced at $1,252 found 6 days ago
Turkish Airlines
Mon, Oct 26 - Thu, Nov 5
BOS
Boston
KIX
Osaka
$1,498 Roundtrip, found 2 hours ago
$1,498
Roundtrip
found 2 hours ago
Select Turkish Airlines flight, departing Mon, Oct 26 from Boston to Osaka, returning Thu, Nov 5, priced at $1,498 found 2 hours ago
Lufthansa
Mon, Jun 1 - Wed, Jun 10
BOS
Boston
KIX
Osaka
$1,512 Roundtrip, found 6 hours ago
$1,512
Roundtrip
found 6 hours ago
Select Lufthansa flight, departing Mon, Jun 1 from Boston to Osaka, returning Wed, Jun 10, priced at $1,512 found 6 hours ago

Find the cheapest month to fly from Boston (BOS) to Osaka (KIX)

September is typically the cheapest month to fly

From $787 - $1,281 per traveler.

Alternative airports near Osaka

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Itami ITM. Closest option available. Average driving time to city center is 10 minutes. Flights from $2,562
ITM
Itami
Closest
Average driving time to city center10 min
Flights from $2,562
Select flight to Kobe Airport UKB. Average driving time to city center is 32 minutes. Flights from $3,124
UKB
Kobe Airport
Average driving time to city center32 min
Flights from $3,124
Flights from Boston (BOS) to Osaka (KIX)
Origin airport
Logan Intl.
Destination airport
Kansai Intl.
Airlines serving
Air Canada, Air France, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Cathay Pacific, Delta, Emirates, Etihad Airways, Hainan Airlines, Hawaiian Airlines, Japan Airlines, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, Turkish Airlines, United
Roundtrip price
$796
Distance
6876 mi

Boston to Osaka Flights

The cheapest times to fly from Boston to Osaka

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to Osaka are during the month of January. You can find some of the cheapest flights from Boston to Osaka with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to Osaka

Sunday is one of the best days to book for cheap flights from Boston to Osaka: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to Osaka

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to Osaka in 2026. You can also book with separate airlines for your outbound and return journeys, from $425 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to Osaka flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to Osaka airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX) cost?
Snag a cheap one-way flight from $425 or cheap return flight from $797 from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX)?
January is the most affordable month to fly from BOS to KIX. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BOS to KIX flight.
How many flights per day from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX)?
You'll have to hop on a flight with a layover if you're traveling from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from BOS to KIX?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX)?
Choose a flight from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX) last-minute?
Booking your plane ticket from BOS to KIX right before your trip is usually more expensive. However, if you're flexible with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a BOS to KIX flight and hotel package?
Compared with arranging flights and hotels separately, booking a BOS to KIX flight and hotel package with Expedia could result in significant savings. What's more, having everything in one convenient place takes the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then tailor your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Kansai Intl. Airport (KIX)?
It's usually possible to reschedule or cancel your BOS to KIX flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.