$325 Cheap Flights from Seattle (SEA) to Osaka (KIX)

View $325 flight on Sun, Jan 18, 2026Opens 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 $325 for one-way flights and $609 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Feb 19 - Sat, Mar 7
SEA
Seattle
KIX
Osaka
$609 Roundtrip, just found
$609
Roundtrip
just found
Select United flight, departing Thu, Feb 19 from Seattle to Osaka, returning Sat, Mar 7, priced at $609 just found
All Nippon Airways
Thu, Feb 19 - Sat, Mar 7
SEA
Seattle
KIX
Osaka
$625 Roundtrip, just found
$625
Roundtrip
just found
Select All Nippon Airways flight, departing Thu, Feb 19 from Seattle to Osaka, returning Sat, Mar 7, priced at $625 just found
Air Canada
Fri, Apr 10 - Mon, Apr 13
SEA
Seattle
KIX
Osaka
$652 Roundtrip, found 4 days ago
$652
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Apr 10 from Seattle to Osaka, returning Mon, Apr 13, priced at $652 found 4 days ago
Delta
Sat, Feb 28 - Tue, Mar 17
SEA
Seattle
KIX
Osaka
$661 Roundtrip, found 4 days ago
$661
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Feb 28 from Seattle to Osaka, returning Tue, Mar 17, priced at $661 found 4 days ago
Japan Airlines
Mon, Jan 12 - Wed, Jan 21
SEA
Seattle
KIX
Osaka
$678 Roundtrip, found 10 hours ago
$678
Roundtrip
found 10 hours ago
Select Japan Airlines flight, departing Mon, Jan 12 from Seattle to Osaka, returning Wed, Jan 21, priced at $678 found 10 hours ago
Alaska Airlines
Wed, Jan 14 - Fri, Jan 30
SEA
Seattle
KIX
Osaka
$690 Roundtrip, found 8 hours ago
$690
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Wed, Jan 14 from Seattle to Osaka, returning Fri, Jan 30, priced at $690 found 8 hours ago
Asiana Airlines
Mon, Nov 10 - Tue, Nov 25
SEA
Seattle
KIX
Osaka
$692 Roundtrip, found 2 hours ago
$692
Roundtrip
found 2 hours ago
Select Asiana Airlines flight, departing Mon, Nov 10 from Seattle to Osaka, returning Tue, Nov 25, priced at $692 found 2 hours ago
Korean Air
Wed, Jan 7 - Fri, Jan 16
SEA
Seattle
KIX
Osaka
$693 Roundtrip, just found
$693
Roundtrip
just found
Select Korean Air flight, departing Wed, Jan 7 from Seattle to Osaka, returning Fri, Jan 16, priced at $693 just found
Philippine Airlines
Sun, May 17 - Sun, May 24
SEA
Seattle
KIX
Osaka
$720 Roundtrip, found 1 hour ago
$720
Roundtrip
found 1 hour ago
Select Philippine Airlines flight, departing Sun, May 17 from Seattle to Osaka, returning Sun, May 24, priced at $720 found 1 hour ago
Hainan Airlines
Thu, Dec 4 - Wed, Dec 10
SEA
Seattle
KIX
Osaka
$745 Roundtrip, found 2 days ago
$745
Roundtrip
found 2 days ago
Select Hainan Airlines flight, departing Thu, Dec 4 from Seattle to Osaka, returning Wed, Dec 10, priced at $745 found 2 days ago

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

February is typically the cheapest month to fly

From $580 - $1,091 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 $697
ITM
Itami
Closest
Average driving time to city center10 min
Flights from $697
Select flight to Kobe Airport UKB. Average driving time to city center is 32 minutes. Flights from $772
UKB
Kobe Airport
Average driving time to city center32 min
Flights from $772

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) cost?
Grab a cheap one-way flight from $325 or cheap return flight from $609 from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX)?
Planning your trip for February is a good way to save, as it's the cheapest month for flights between SEA and KIX. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Kansai Intl. Airport (KIX)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to KIX flight.
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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Kansai Intl.
Airlines serving
Air Canada, Air China, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, Emirates, Finnair, Hainan Airlines, Hawaiian Airlines, Japan Airlines, Korean Air, Philippine Airlines, STARLUX Airlines, Singapore Airlines, Turkish Airlines, United
Roundtrip price
$608
Distance
5027 mi

Book with confidence

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 February. 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 $325 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.

 

Seattle to Osaka Flights

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*Available to One Key members.