Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Osaka from $379

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 10:20 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
22h 20m2 stops Honolulu Tokyo Haneda
Multiple Airlines Logo
9:10 pm - 9:15 amKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
29h 05m1 stop Tokyo Haneda
$777Multiple Airlines
Tue, Dec 1 - Wed, Dec 16
Multiple Airlines Logo
11:55 am - 10:20 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
17h 25m1 stop Tokyo Narita
Multiple Airlines Logo
9:10 pm - 9:15 amKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
29h 05m1 stop Tokyo Haneda
$777Multiple Airlines
Tue, Dec 1 - Wed, Dec 16
Air Canada Logo
10:50 am - 4:25 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 35m1 stop Vancouver Intl
Air Canada Logo
6:00 pm - 2:22 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
12h 22m1 stop Vancouver Intl
$814Air Canada
Sun, Sep 20 - Mon, Oct 5
Air Canada Logo
7:15 pm - 4:25 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
29h 10m1 stop Vancouver Intl
Air Canada Logo
6:00 pm - 10:47 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
20h 47m1 stop Vancouver Intl
$814Air Canada
Sun, Sep 13 - Mon, Sep 28
Air Canada Logo
5:50 am - 4:25 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
18h 35m1 stop Vancouver Intl
Air Canada Logo
6:00 pm - 10:47 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
20h 47m1 stop Vancouver Intl
$814Air Canada
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
8:15 am - 8:35 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
19h 20m2 stops Vancouver Intl Tokyo Narita
Multiple Airlines Logo
3:30 pm - 2:37 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
16h 07m2 stops Sapporo Chitose Vancouver Intl
$839Multiple Airlines
Tue, Jan 26 - Tue, Feb 2
Asiana Airlines Logo
12:10 am - 9:40 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
16h 30m1 stop Incheon Intl
Asiana Airlines Logo
8:20 pm - 1:55 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
34h 35m1 stop Incheon Intl
$1,071Asiana Airlines
Tue, Jan 12 - Wed, Feb 3
Asiana Airlines Logo
12:10 am - 9:40 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
16h 30m1 stop Incheon Intl
Asiana Airlines Logo
9:10 am - 1:55 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
21h 45m1 stop Incheon Intl
$1,083Asiana Airlines
Sun, Feb 7 - Fri, Feb 12
ANA Logo
7:11 am - 2:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 39m1 stop San Francisco
ANA Logo
9:00 pm - 2:25 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
33h 25m1 stop Tokyo Haneda
$1,116ANA
Tue, Sep 22 - Mon, Oct 12
ANA Logo
7:11 am - 2:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 39m1 stop San Francisco
ANA Logo
9:00 pm - 2:25 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
33h 25m1 stop Tokyo Haneda
$1,116ANA
Tue, Sep 22 - Mon, Oct 5

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Air Canada flights from Seattle to Osaka Kansai Intl Airport

Our best Air Canada deals on Seattle to Osaka Kansai Intl Airport flight tickets
Air Canada
Sep 20
SEA5:50 amSeattle/Tacoma Intl
18h 35m
1 stop
KIX4:25 pmOsaka Kansai Intl
Oct 5
KIX6:00 pmOsaka Kansai Intl
20h 47m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$814
Air Canada
Sep 13
SEA7:15 pmSeattle/Tacoma Intl
29h 10m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 28
KIX6:00 pmOsaka Kansai Intl
20h 47m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$819
Air Canada
Sep 12
SEA3:00 pmSeattle/Tacoma Intl
33h 25m
1 stop
KIX4:25 pmOsaka Kansai Intl
Oct 1
KIX6:00 pmOsaka Kansai Intl
20h 47m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$821

Cathay Pacific flights from Seattle to Osaka Kansai Intl Airport

Our best Cathay Pacific deals on Seattle to Osaka Kansai Intl Airport flight tickets
Cathay Pacific
Aug 31
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Sep 7
KIX5:35 pmOsaka Kansai Intl
32h 45m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$850
Cathay Pacific
Sep 14
SEA12:25 pmSeattle/Tacoma Intl
32h 30m
1 stop
KIX12:55 pmOsaka Kansai Intl
Sep 30
KIX9:05 amOsaka Kansai Intl
17h 00m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$863
Cathay Pacific
Aug 31
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Sep 7
KIX4:15 pmOsaka Kansai Intl
34h 05m
2 stops
SEA10:20 amSeattle/Tacoma Intl
$866

momondo Fare Finder

 
Use the filters below to find and compare flights from Seattle to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 12/1

7:00 am-10:20 pm

2 stops22h 20m

Osaka Kansai Intl

Wed 12/16

9:10 pm-9:15 am

1 stop29h 05m

$777

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 12/1

11:55 am-10:20 pm

1 stop17h 25m

Osaka Kansai Intl

Wed 12/16

9:10 pm-9:15 am

1 stop29h 05m

$777
Quickest round-trip

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 9/20

10:50 am-4:25 pm

1 stop13h 35m

Osaka Kansai Intl

Mon 10/5

6:00 pm-2:22 pm

1 stop12h 22m

$814

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 9/13

7:15 pm-4:25 pm

1 stop29h 10m

Osaka Kansai Intl

Mon 9/28

6:00 pm-10:47 pm

1 stop20h 47m

$814

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 9/20

5:50 am-4:25 pm

1 stop18h 35m

Osaka Kansai Intl

Mon 10/5

6:00 pm-10:47 pm

1 stop20h 47m

$814

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 1/26

8:15 am-8:35 pm

2 stops19h 20m

Osaka Kansai Intl

Tue 2/2

3:30 pm-2:37 pm

2 stops16h 07m

$839

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 1/12

12:10 am-9:40 am

1 stop16h 30m

Osaka Kansai Intl

Wed 2/3

8:20 pm-1:55 pm

1 stop34h 35m

$1,071

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 2/7

12:10 am-9:40 am

1 stop16h 30m

Osaka Kansai Intl

Fri 2/12

9:10 am-1:55 pm

1 stop21h 45m

$1,083

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 9/22

7:11 am-2:50 pm

1 stop15h 39m

Osaka Kansai Intl

Mon 10/12

9:00 pm-2:25 pm

1 stop33h 25m

$1,116

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 9/22

7:11 am-2:50 pm

1 stop15h 39m

Osaka Kansai Intl

Mon 10/5

9:00 pm-2:25 pm

1 stop33h 25m

$1,116

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Osaka from

How to get the cheapest flight ticket from Seattle to Osaka Kansai Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Osaka Kansai Intl Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $825 to $1,119.
The lowest price recently found on this route was $814.

What is the cheapest month to fly to Osaka Kansai Intl Airport?

In general, February is the cheapest month to fly from Seattle to Osaka Kansai Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $671. If you aren’t able to travel during the month of February, then book flights to Osaka Kansai Intl Airport from Seattle during April instead. Flights to Osaka Kansai Intl Airport in April, while not as cheap as those in February, still average around $740.

How far in advance should I book a flight from Seattle to Osaka Kansai Intl Airport?

You are more likely to see cheaper flights to Osaka Kansai Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka Kansai Intl Airport for around $914 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka Kansai Intl Airport from Seattle for as low as $645 on momondo.

How have Seattle to Osaka Kansai Intl Airport flight prices changed over time?

As of August 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 25% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Osaka Kansai Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Osaka Kansai Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Osaka Kansai Intl Airport (SEA to KIX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Osaka Kansai Intl Airport

Best Price Found

$379

Fastest flight time

17h 15m

Direct flights

None
The best one-way flight to Osaka Kansai Intl Airport from Seattle in the past 72 hours is $379. The best round-trip flight deal from Seattle to Osaka Kansai Intl Airport found on momondo in the last 72 hours is $777.
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 17h 15m
There are no direct flights from Seattle to Osaka Kansai Intl Airport. There are no popular flight routes from Seattle to Osaka Kansai Intl Airport.
Search flight deals

Frequently asked questions about flying from Seattle to Osaka Kansai Intl Airport

  • How far is Seattle/Tacoma Intl to Osaka Kansai Intl by plane?

    The distance between Seattle/Tacoma Intl and Osaka Kansai Intl is about 5017.2 mi. By plane, this route typically takes 17h 15m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport.

  • What documentation or ID do you need to fly to Osaka Kansai Intl Airport?

    The travel and health documents you'll need for your trip to Osaka Kansai Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Osaka Kansai Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Osaka Kansai Intl Airport?

Best airlines flying from Seattle to Osaka Kansai Intl Airport

Compare and see reviews for airlines that fly from Seattle to Osaka Kansai Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $370Free CancellationRating
7.9
12,864 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
558 reviews
Search Asiana Airlines flights
ANAPriceFrom $649Free CancellationRating
8.3
1,306 reviews
Search ANA flights
Air CanadaPriceFrom $675Free CancellationRating
7.1
11,557 reviews
Search Air Canada flights

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara
Izumisano
Himeji
Nishinomiya

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Osaka?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Osaka for you.

Can I find flights from Seattle to Osaka with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Osaka flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Osaka?

momondo provides multiple filters to help you find the best flight to Osaka from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Osaka right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Osaka flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Osaka Kansai Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 9/29
Tue 10/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Osaka

Popular cities in Japan

Flights to Tokyo Haneda Airportfrom $703
Flights to Tokyo Narita Airportfrom $464
Flights to Osaka Itami Airportfrom $698
Flights to Nagoya Chubu Centrair Intl Airportfrom $689