$392 Cheap Flights from Boise (BOI) to Osaka (KIX)

View $392 flight on Sun, Apr 5, 2026Opens in a new window

Popular airlines from Boise Airport (BOI) to Kansai Intl. Airport (KIX)

Cheap Flights from Boise to Osaka (BOI-KIX)

Prices were available within the past 7 days and start at $392 for one-way flights and $650 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Jan 14 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$650 Roundtrip, found 4 days ago
$650
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 14 from Boise to Osaka, returning Wed, Jan 21, priced at $650 found 4 days ago
United
Sun, Feb 8 - Fri, Feb 20
BOI
Boise
KIX
Osaka
$652 Roundtrip, found 3 days ago
$652
Roundtrip
found 3 days ago
Select United flight, departing Sun, Feb 8 from Boise to Osaka, returning Fri, Feb 20, priced at $652 found 3 days ago
United
Wed, Jan 14 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$654 Roundtrip, found 4 days ago
$654
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 14 from Boise to Osaka, returning Wed, Jan 21, priced at $654 found 4 days ago
United
Tue, Jan 6 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$656 Roundtrip, found 5 days ago
$656
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jan 6 from Boise to Osaka, returning Wed, Jan 21, priced at $656 found 5 days ago
United
Wed, Jan 14 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$659 Roundtrip, found 4 days ago
$659
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 14 from Boise to Osaka, returning Wed, Jan 21, priced at $659 found 4 days ago
United
Wed, Jan 14 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$661 Roundtrip, found 4 days ago
$661
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jan 14 from Boise to Osaka, returning Wed, Jan 21, priced at $661 found 4 days ago
Delta
Wed, Feb 11 - Thu, Feb 26
BOI
Boise
KIX
Osaka
$664 Roundtrip, found 5 days ago
$664
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Feb 11 from Boise to Osaka, returning Thu, Feb 26, priced at $664 found 5 days ago
All Nippon Airways
Mon, Jan 12 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$666 Roundtrip, found 3 days ago
$666
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Mon, Jan 12 from Boise to Osaka, returning Wed, Jan 21, priced at $666 found 3 days ago
Alaska Airlines
Mon, Jan 12 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$670 Roundtrip, found 3 days ago
$670
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Jan 12 from Boise to Osaka, returning Wed, Jan 21, priced at $670 found 3 days ago
Korean Air
Mon, Jan 12 - Wed, Jan 21
BOI
Boise
KIX
Osaka
$710 Roundtrip, found 3 days ago
$710
Roundtrip
found 3 days ago
Select Korean Air flight, departing Mon, Jan 12 from Boise to Osaka, returning Wed, Jan 21, priced at $710 found 3 days ago

Alternative airports near Osaka

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

Select flight to Kobe Airport UKB. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $1,349
UKB
Kobe Airport
Cheapest
Average driving time to city center32 min
Flights from $1,349
Flights from Boise (BOI) to Osaka (KIX)
Origin airport
Boise
Destination airport
Kansai Intl.
Airlines serving
Air Canada, Alaska Airlines, All Nippon Airways, American Airlines, Delta, Korean Air, STARLUX Airlines, United
Roundtrip price
$649
Distance
5422 mi

Boise to Osaka Flights

The cheapest times to fly from Boise 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 Boise to Osaka are during the month of January. You can find some of the cheapest flights from Boise to Osaka with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to Osaka

Sunday is one of the best days to book for cheap flights from Boise 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 Boise 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 Boise to Osaka in 2025. You can also book with separate airlines for your outbound and return journeys, from $392 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 Boise 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 Boise 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 Boise Airport (BOI) to Kansai Intl. Airport (KIX) cost?
Grab a cheap one-way flight from $392 or cheap return flight from $650 from Boise Airport (BOI) to Kansai Intl. Airport (KIX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Boise Airport (BOI) to Kansai Intl. Airport (KIX)?
The cheapest month to fly from BOI to KIX is January, when demand is low. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Boise Airport (BOI) to Kansai Intl. Airport (KIX)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BOI to KIX flight.
How many flights per day from Boise Airport (BOI) to Kansai Intl. Airport (KIX)?
There are no daily direct flights available from Boise Airport (BOI) to Kansai Intl. Airport (KIX). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from BOI to KIX?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be 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 Boise Airport (BOI) to Kansai Intl. Airport (KIX)?
To avoid potential delays on the Boise Airport (BOI) to Kansai Intl. Airport (KIX) route, travel before 3 PM. Later flights are 22% more likely to be canceled.**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 Boise Airport (BOI) to Kansai Intl. Airport (KIX) last-minute?
Booking your ticket from BOI to KIX right before your journey is usually more expensive. But if there's some wiggle room with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a BOI to KIX flight and hotel package?
You can save money by booking a BOI to KIX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your ideal flights and accommodations, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Kansai Intl. Airport (KIX)?
In most cases, you're able to cancel or reschedule your BOI to KIX flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further details, go to our Customer Service portal.

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*Available to One Key members.