Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Osaka from $421

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.
Cathay Pacific Logo
10:25 am - 12:45 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
33h 20m1 stop Hong Kong Intl
Cathay Pacific Logo
6:05 pm - 8:45 amKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
31h 40m1 stop Hong Kong Intl
$780Cathay Pacific
Mon, Jan 18 - Tue, Jan 26
Cathay Pacific Logo
10:25 am - 6:20 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
26h 55m1 stop Hong Kong Intl
Cathay Pacific Logo
9:50 am - 8:45 amKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
39h 55m1 stop Hong Kong Intl
$851Cathay Pacific
Mon, Jan 11 - Mon, Feb 22
Air Canada Logo
8:40 am - 5:40 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
16h 00m1 stop Vancouver Intl
Air Canada Logo
7:25 pm - 2:37 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
12h 12m1 stop Vancouver Intl
$924Air Canada
Tue, Feb 16 - Thu, Feb 25
Air Canada Logo
7:05 pm - 5:40 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
29h 35m1 stop Vancouver Intl
Air Canada Logo
7:25 pm - 9:57 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
19h 32m1 stop Vancouver Intl
$924Air Canada
Sat, Feb 6 - Wed, Feb 17
China Airlines Logo
12:10 am - 11:35 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
18h 25m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
7:00 pm - 6:10 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
16h 10m1 stop Taipei City Taiwan Taoyuan Intl
$955China Airlines
Sun, Feb 28 - Sat, Mar 13
China Airlines Logo
1:10 am - 11:35 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
18h 25m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
2:30 pm - 6:10 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
20h 40m1 stop Taipei City Taiwan Taoyuan Intl
$956China Airlines
Sun, Oct 25 - Thu, Nov 5
ANA Logo
7:11 am - 2:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 39m1 stop San Francisco
ANA Logo
9:45 am - 1:20 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
20h 35m1 stop Tokyo Haneda
$1,007ANA
Tue, Oct 20 - Fri, Nov 6
ANA Logo
7:11 am - 2:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 39m1 stop San Francisco
ANA Logo
9:45 am - 1:20 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
20h 35m1 stop Tokyo Haneda
$1,007ANA
Tue, Oct 6 - Tue, Nov 10
Asiana Airlines Logo
7:35 pm - 7:00 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
31h 25m2 stops San Francisco Incheon Intl
Asiana Airlines Logo
8:50 am - 8:47 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 57m2 stops Incheon Intl San Francisco
$2,323Asiana Airlines
Wed, Oct 28 - Sat, Oct 31
Asiana Airlines Logo
5:23 pm - 9:15 amSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
23h 52m2 stops San Francisco Incheon Intl
Asiana Airlines Logo
10:30 am - 8:47 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
26h 17m2 stops Incheon Intl San Francisco
$2,332Asiana Airlines
Mon, Oct 26 - Sat, Oct 31

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

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
Jan 18
SEA10:25 amSeattle/Tacoma Intl
33h 20m
1 stop
KIX12:45 pmOsaka Kansai Intl
Jan 26
KIX6:05 pmOsaka Kansai Intl
31h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$780
Cathay Pacific
Jan 11
SEA10:25 amSeattle/Tacoma Intl
26h 55m
1 stop
KIX6:20 amOsaka Kansai Intl
Feb 22
KIX9:50 amOsaka Kansai Intl
39h 55m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$851
Cathay Pacific
Jan 11
SEA10:25 amSeattle/Tacoma Intl
26h 55m
1 stop
KIX6:20 amOsaka Kansai Intl
Feb 22
KIX9:50 amOsaka Kansai Intl
39h 55m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$854

ANA flights from Seattle to Osaka Kansai Intl Airport

Our best ANA deals on Seattle to Osaka Kansai Intl Airport flight tickets
ANA
Oct 5
SEA8:29 pmSeattle/Tacoma Intl
26h 21m
1 stop
KIX2:50 pmOsaka Kansai Intl
Dec 1
KIX9:45 amOsaka Kansai Intl
20h 35m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$1,007
ANA
Oct 5
SEA8:29 pmSeattle/Tacoma Intl
26h 21m
1 stop
KIX2:50 pmOsaka Kansai Intl
Nov 11
KIX3:20 pmOsaka Kansai Intl
22h 27m
2 stops
SEA8:47 pmSeattle/Tacoma Intl
$1,017
ANA
Oct 6
SEA7:11 amSeattle/Tacoma Intl
15h 39m
1 stop
KIX2:50 pmOsaka Kansai Intl
Nov 10
KIX7:05 amOsaka Kansai Intl
30h 42m
2 stops
SEA8:47 pmSeattle/Tacoma Intl
$1,048

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

Mon 1/18

10:25 am-12:45 pm

1 stop33h 20m

Osaka Kansai Intl

Tue 1/26

6:05 pm-8:45 am

1 stop31h 40m

$780

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Mon 1/11

10:25 am-6:20 am

1 stop26h 55m

Osaka Kansai Intl

Mon 2/22

9:50 am-8:45 am

1 stop39h 55m

$851
Quickest round-trip

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 2/16

8:40 am-5:40 pm

1 stop16h 00m

Osaka Kansai Intl

Thu 2/25

7:25 pm-2:37 pm

1 stop12h 12m

$924

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sat 2/6

7:05 pm-5:40 pm

1 stop29h 35m

Osaka Kansai Intl

Wed 2/17

7:25 pm-9:57 pm

1 stop19h 32m

$924

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 2/28

12:10 am-11:35 am

1 stop18h 25m

Osaka Kansai Intl

Sat 3/13

7:00 pm-6:10 pm

1 stop16h 10m

$955

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Sun 10/25

1:10 am-11:35 am

1 stop18h 25m

Osaka Kansai Intl

Thu 11/5

2:30 pm-6:10 pm

1 stop20h 40m

$956

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 10/20

7:11 am-2:50 pm

1 stop15h 39m

Osaka Kansai Intl

Fri 11/6

9:45 am-1:20 pm

1 stop20h 35m

$1,007

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Tue 10/6

7:11 am-2:50 pm

1 stop15h 39m

Osaka Kansai Intl

Tue 11/10

9:45 am-1:20 pm

1 stop20h 35m

$1,007

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Wed 10/28

7:35 pm-7:00 pm

2 stops31h 25m

Osaka Kansai Intl

Sat 10/31

8:50 am-8:47 pm

2 stops27h 57m

$2,323

SeattleOsaka

SEA Seattle/Tacoma Intl - KIX Osaka Kansai Intl

SEAKIX

Seattle/Tacoma Intl

Mon 10/26

5:23 pm-9:15 am

2 stops23h 52m

Osaka Kansai Intl

Sat 10/31

10:30 am-8:47 pm

2 stops26h 17m

$2,332

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 typical for flights on this route.

Typical prices usually range from $840 to $1,144.
The lowest price recently found on this route was $854.

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 January instead. Flights to Osaka Kansai Intl Airport in January, while not as cheap as those in February, still average around $751.

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

As of September 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 15% more expensive 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

$421

Fastest flight time

16h 45m

Direct flights

None
The best one-way flight to Osaka Kansai Intl Airport from Seattle in the past 72 hours is $421. The best round-trip flight deal from Seattle to Osaka Kansai Intl Airport found on momondo in the last 72 hours is $780.
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 16h 45m
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 16h 45m.

  • 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
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
562 reviews
Search Asiana Airlines flights
ANAPriceFrom $649Free CancellationRating
8.3
1,319 reviews
Search ANA flights
Air CanadaPriceFrom $862Free CancellationRating
7.1
11,696 reviews
Search Air Canada flights
China AirlinesPriceFrom $915Free CancellationRating
8.3
847 reviews
Search China Airlines 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
Mon 10/26
Mon 11/2
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 $226
Flights to Tokyo Narita Airportfrom $200
Flights to Osaka Itami Airportfrom $726
Flights to Nagoya Chubu Centrair Intl Airportfrom $746