Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Osaka from $444

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Osaka departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

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

Find the cheapest flights from Seattle to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
9:05 am - 10:20 am
KIX
-
SEA
17h 15m
1 stop
$869Cathay Pacific
Tue, Sep 1 - Tue, Sep 8
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$876Hainan Airlines
Sat, Sep 19 - Mon, Oct 19
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
6:30 pm - 10:20 am
KIX
-
SEA
31h 50m
1 stop
$897Cathay Pacific
Tue, Sep 1 - Wed, Sep 9
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
3:15 pm - 8:05 pm
KIX
-
SEA
20h 50m
1 stop
$906Philippine Airlines
Thu, Sep 3 - Wed, Sep 9
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$916Hainan Airlines
Sat, Sep 5 - Fri, Sep 11
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
3:15 pm - 8:05 pm
KIX
-
SEA
20h 50m
1 stop
$936Philippine Airlines
Tue, Sep 1 - Wed, Sep 9
Cathay Pacific Logo
11:45 am - 3:10 pm
SEA
-
KIX
35h 25m
1 stop
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$937Cathay Pacific
Wed, Sep 16 - Thu, Sep 24
Philippine Airlines Logo
11:10 pm - 7:35 pm
SEA
-
KIX
28h 25m
1 stop
Philippine Airlines Logo
10:25 am - 8:05 pm
KIX
-
SEA
25h 40m
1 stop
$939Philippine Airlines
Sun, Aug 30 - Wed, Sep 9
Cathay Pacific Logo
11:45 am - 2:50 pm
SEA
-
KIX
35h 05m
2 stops
Cathay Pacific Logo
4:15 pm - 10:05 am
KIX
-
SEA
33h 50m
2 stops
$943Cathay Pacific
Tue, Sep 29 - Fri, Oct 16
Cathay Pacific Logo
11:45 am - 2:50 pm
SEA
-
KIX
35h 05m
2 stops
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$952Cathay Pacific
Wed, Sep 16 - Thu, Sep 24

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 9
SEA10:30 amSeattle/Tacoma Intl
13h 55m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 22
KIX6:00 pmOsaka Kansai Intl
12h 22m
1 stop
SEA2:22 pmSeattle/Tacoma Intl
$967
Air Canada
Sep 1
SEA7:20 pmSeattle/Tacoma Intl
29h 05m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 10
KIX6:00 pmOsaka Kansai Intl
12h 22m
1 stop
SEA2:22 pmSeattle/Tacoma Intl
$997
Air Canada
Sep 16
SEA10:30 amSeattle/Tacoma Intl
13h 55m
1 stop
KIX4:25 pmOsaka Kansai Intl
Oct 22
KIX9:20 amOsaka Kansai Intl
21h 02m
2 stops
SEA2:22 pmSeattle/Tacoma Intl
$1,010

ANA flights from Seattle to Osaka Kansai Intl Airport

Our best ANA deals on Seattle to Osaka Kansai Intl Airport flight tickets
ANA
Sep 8
SEA7:20 pmSeattle/Tacoma Intl
29h 05m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 24
KIX6:00 pmOsaka Kansai Intl
16h 32m
1 stop
SEA6:32 pmSeattle/Tacoma Intl
$973
ANA
Jun 2
SEA6:08 amSeattle/Tacoma Intl
16h 42m
1 stop
KIX2:50 pmOsaka Kansai Intl
Jun 9
KIX6:45 amOsaka Kansai Intl
23h 40m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,344
ANA
May 31
SEA7:00 amSeattle/Tacoma Intl
15h 50m
1 stop
KIX2:50 pmOsaka Kansai Intl
Jun 11
KIX3:50 pmOsaka Kansai Intl
14h 35m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,372

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Osaka Kansai Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 22, 2026.
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
Quickest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Tue 9/8

9:05 am-10:20 am

1 stop17h 15m

$869

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/19

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 10/19

2:20 pm-9:00 am

1 stop34h 40m

$876

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Wed 9/9

6:30 pm-10:20 am

1 stop31h 50m

$897

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 9/3

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/9

3:15 pm-8:05 pm

1 stop20h 50m

$906

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/5

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 9/11

2:20 pm-9:00 am

1 stop34h 40m

$916

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/9

3:15 pm-8:05 pm

1 stop20h 50m

$936

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/16

11:45 am-3:10 pm

1 stop35h 25m

Osaka Kansai Intl

Thu 9/24

9:05 am-10:05 am

1 stop17h 00m

$937

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

11:10 pm-7:35 pm

1 stop28h 25m

Osaka Kansai Intl

Wed 9/9

10:25 am-8:05 pm

1 stop25h 40m

$939

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/29

11:45 am-2:50 pm

2 stops35h 05m

Osaka Kansai Intl

Fri 10/16

4:15 pm-10:05 am

2 stops33h 50m

$943

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/16

11:45 am-2:50 pm

2 stops35h 05m

Osaka Kansai Intl

Thu 9/24

9:05 am-10:05 am

1 stop17h 00m

$952

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?

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

In general, November 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 $685. If you aren’t able to travel during the month of November, 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 November, still average around $705.

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 $844 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 $715 on momondo.

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

As of May 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 26% 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

Fastest flight time

13h 40m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 13h 40m
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 13h 40m.

  • 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
12,395 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
534 reviews
Search Asiana Airlines flights
ANAPriceFrom $650Free CancellationRating
8.3
1,211 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
11,075 reviews
Search Air Canada flights

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Izumisano
Nara
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
Sun 6/21
Sun 6/28
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

Popular flights according to clicks in the last 7 days on momondo
Flights to Tokyo Narita Airportfrom $420
Flights to Tokyo Haneda Airportfrom $755
Flights to Osaka Itami Airportfrom $585
Flights to Nagoya Chubu Centrair Intl Airportfrom $783