$393 Cheap Flights from Seattle (SEA) to Osaka (KIX)

View $393 flight on Mon, Aug 18, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Kansai Intl. Airport (KIX)

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Cheap Flights from Seattle to Osaka (SEA-KIX)

Prices were available within the past 7 days and start at $393 for one-way flights and $642 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 7 - Thu, Oct 9
SEA
Seattle
KIX
Osaka
$642 Roundtrip, found 1 hour ago
$642
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Oct 7 from Seattle to Osaka, returning Thu, Oct 9, priced at $642 found 1 hour ago
Delta
Tue, Nov 25 - Tue, Dec 9
SEA
Seattle
KIX
Osaka
$715 Roundtrip, found 5 hours ago
$715
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Nov 25 from Seattle to Osaka, returning Tue, Dec 9, priced at $715 found 5 hours ago
Asiana Airlines
Mon, Sep 15 - Tue, Sep 30
SEA
Seattle
KIX
Osaka
$723 Roundtrip, just found
$723
Roundtrip
just found
Select Asiana Airlines flight, departing Mon, Sep 15 from Seattle to Osaka, returning Tue, Sep 30, priced at $723 just found
Bargain Flight
Mon, Mar 2 - Mon, Mar 16
SEA
Seattle
KIX
Osaka
$739 Roundtrip, found 4 days ago
$739
Roundtrip
found 4 days ago
Select Bargain Flight flight, departing Mon, Mar 2 from Seattle to Osaka, returning Mon, Mar 16, priced at $739 found 4 days ago
Korean Air
Mon, Sep 15 - Tue, Sep 30
SEA
Seattle
KIX
Osaka
$748 Roundtrip, just found
$748
Roundtrip
just found
Select Korean Air flight, departing Mon, Sep 15 from Seattle to Osaka, returning Tue, Sep 30, priced at $748 just found
All Nippon Airways
Mon, Sep 15 - Tue, Sep 30
SEA
Seattle
KIX
Osaka
$752 Roundtrip, just found
$752
Roundtrip
just found
Select All Nippon Airways flight, departing Mon, Sep 15 from Seattle to Osaka, returning Tue, Sep 30, priced at $752 just found
Philippine Airlines
Wed, Nov 19 - Thu, Nov 27
SEA
Seattle
KIX
Osaka
$772 Roundtrip, just found
$772
Roundtrip
just found
Select Philippine Airlines flight, departing Wed, Nov 19 from Seattle to Osaka, returning Thu, Nov 27, priced at $772 just found
Hawaiian Airlines
Wed, Jan 14 - Fri, Jan 23
SEA
Seattle
KIX
Osaka
$840 Roundtrip, just found
$840
Roundtrip
just found
Select Hawaiian Airlines flight, departing Wed, Jan 14 from Seattle to Osaka, returning Fri, Jan 23, priced at $840 just found
Alaska Airlines
Wed, Nov 26 - Wed, Dec 3
SEA
Seattle
KIX
Osaka
$840 Roundtrip, just found
$840
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Nov 26 from Seattle to Osaka, returning Wed, Dec 3, priced at $840 just found
Japan Airlines
Sun, Sep 7 - Thu, Sep 18
SEA
Seattle
KIX
Osaka
$878 Roundtrip, found 3 days ago
$878
Roundtrip
found 3 days ago
Select Japan Airlines flight, departing Sun, Sep 7 from Seattle to Osaka, returning Thu, Sep 18, priced at $878 found 3 days ago

Find the cheapest month to fly from Seattle (SEA) to Osaka (KIX)

March is typically the cheapest month to fly

From $669 - $1,035 per traveler.

Graph displaying average flight prices per month

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 $1,170
ITM
Itami
Closest
Average driving time to city center10 min
Flights from $1,170
Select flight to Kobe Airport UKB. Average driving time to city center is 32 minutes. Flights from $1,459
UKB
Kobe Airport
Average driving time to city center32 min
Flights from $1,459
Flights from Seattle (SEA) to Osaka (KIX)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Kansai Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Hainan Airlines, Hawaiian Airlines, Japan Airlines, KLM, Korean Air, Philippine Airlines, STARLUX Airlines, Turkish Airlines, United
Roundtrip price
$642
Distance
5027 mi

Seattle to Osaka Flights

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

 

The best time to book a flight from Seattle to Osaka

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to Osaka in 2025. You can also book with separate airlines for your outbound and return journeys, from $393 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 Seattle 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 Seattle 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 Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) cost?
Discover the latest flight deals from SEA to KIX by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to KIX?
The cheapest flights from SEA to KIX are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to KIX?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to KIX. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to KIX?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX)?
Opt for a flight from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time 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 Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) last-minute?
Booking your plane ticket from SEA to KIX shortly before your trip is usually more expensive. But if you're flexible with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a SEA to KIX flight and hotel package?
Opting for a SEA to KIX flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX)?
In most cases, you can cancel or reschedule your SEA to KIX flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you want further information, visit our Customer Service portal.

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*Available to One Key members.