Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Osaka from $304

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 11/18. 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

Asiana Airlines Logo
12:10 am - 9:40 amSEA-KIX
16h 30m1 stop
Asiana Airlines Logo
10:50 am - 1:55 pmKIX-SEA
20h 05m1 stop
$572Asiana Airlines
Find Deal
Sun, Nov 30 - Sun, Dec 7
Asiana Airlines Logo
2:15 pm - 9:05 pmSEA-KIX
14h 50m1 stop
Asiana Airlines Logo
9:00 am - 2:55 pmKIX-SEA
21h 55m1 stop
$594Asiana Airlines
Find Deal
Tue, Oct 21 - Tue, Oct 28
ANA Logo
3:40 pm - 8:35 amSEA-KIX
23h 55m1 stop
ANA Logo
3:45 pm - 1:20 pmKIX-SEA
14h 35m1 stop
$596ANA
Find Deal
Tue, Nov 11 - Fri, Nov 21
ANA Logo
3:40 pm - 8:35 amSEA-KIX
23h 55m1 stop
ANA Logo
5:35 pm - 1:20 pmKIX-SEA
12h 45m1 stop
$598ANA
Find Deal
Sun, Nov 9 - Tue, Nov 18
Asiana Airlines Logo
12:10 am - 8:55 pmSEA-KIX
27h 45m1 stop
Asiana Airlines Logo
10:50 am - 1:55 pmKIX-SEA
20h 05m1 stop
$599Asiana Airlines
Find Deal
Thu, Nov 6 - Sat, Nov 15
United Airlines Logo
6:08 pm - 4:40 pmSEA-KIX
29h 32m2 stops
United Airlines Logo
8:20 am - 2:20 pmKIX-SEA
22h 00m1 stop
$607United Airlines
Find Deal
Tue, Mar 3 - Tue, Mar 17
Korean Air Logo
12:00 pm - 12:50 pmSEA-KIX
32h 50m1 stop
Korean Air Logo
11:55 am - 8:14 pmKIX-SEA
24h 19m2 stops
$628Korean Air
Find Deal
Tue, Oct 28 - Fri, Oct 31
Korean Air Logo
7:00 am - 9:00 pmSEA-KIX
22h 00m2 stops
Korean Air Logo
6:10 pm - 10:00 amKIX-SEA
31h 50m1 stop
$634Korean Air
Find Deal
Tue, Oct 21 - Mon, Oct 27
United Airlines Logo
7:00 am - 4:40 pmSEA-KIX
16h 40m1 stop
United Airlines Logo
8:20 am - 1:20 pmKIX-SEA
22h 00m1 stop
$672United Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 17
Air Canada Logo
10:05 am - 5:40 pmSEA-KIX
15h 35m1 stop
Air Canada Logo
7:25 pm - 3:01 pmKIX-SEA
11h 36m1 stop
$676Air Canada
Find Deal
Sun, Mar 8 - Thu, Mar 12

Korean Air flights from Seattle to Osaka Kansai Intl Airport

Our best Korean Air deals on Seattle to Osaka Kansai Intl Airport flight tickets
Korean Air
Oct 28
SEA12:00 pmSeattle/Tacoma Intl
32h 50m
1 stop
KIX12:50 pmOsaka Kansai Intl
Oct 31
KIX11:55 amOsaka Kansai Intl
24h 19m
2 stops
SEA8:14 pmSeattle/Tacoma Intl
$628
Find similar
Korean Air
Oct 21
SEA7:00 amSeattle/Tacoma Intl
22h 00m
2 stops
KIX9:00 pmOsaka Kansai Intl
Oct 27
KIX6:10 pmOsaka Kansai Intl
31h 50m
1 stop
SEA10:00 amSeattle/Tacoma Intl
$634
Find similar
Korean Air
Oct 28
SEA12:00 pmSeattle/Tacoma Intl
16h 45m
1 stop
KIX8:45 pmOsaka Kansai Intl
Oct 31
KIX11:55 amOsaka Kansai Intl
14h 05m
1 stop
SEA10:00 amSeattle/Tacoma Intl
$638
Find similar

Philippine Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best Philippine Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
Philippine Airlines
Oct 12
SEA11:35 pmSeattle/Tacoma Intl
22h 45m
1 stop
KIX2:20 pmOsaka Kansai Intl
Oct 19
KIX10:20 amOsaka Kansai Intl
24h 55m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$668
Find similar
Philippine Airlines
Nov 16
SEA9:30 pmSeattle/Tacoma Intl
29h 05m
1 stop
KIX7:35 pmOsaka Kansai Intl
Nov 30
KIX10:15 amOsaka Kansai Intl
25h 25m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$686
Find similar
Philippine Airlines
Oct 1
SEA11:35 pmSeattle/Tacoma Intl
28h 05m
1 stop
KIX7:40 pmOsaka Kansai Intl
Oct 12
KIX10:20 amOsaka Kansai Intl
24h 55m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$695
Find similar

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 September 17, 2025.
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

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 11/30

12:10 am-9:40 am

1 stop16h 30m

Osaka Kansai Intl

Sun 12/7

10:50 am-1:55 pm

1 stop20h 05m

$572

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/21

2:15 pm-9:05 pm

1 stop14h 50m

Osaka Kansai Intl

Tue 10/28

9:00 am-2:55 pm

1 stop21h 55m

$594

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 11/11

3:40 pm-8:35 am

1 stop23h 55m

Osaka Kansai Intl

Fri 11/21

3:45 pm-1:20 pm

1 stop14h 35m

$596

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 11/9

3:40 pm-8:35 am

1 stop23h 55m

Osaka Kansai Intl

Tue 11/18

5:35 pm-1:20 pm

1 stop12h 45m

$598

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 11/6

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Sat 11/15

10:50 am-1:55 pm

1 stop20h 05m

$599

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 3/3

6:08 pm-4:40 pm

2 stops29h 32m

Osaka Kansai Intl

Tue 3/17

8:20 am-2:20 pm

1 stop22h 00m

$607

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/28

12:00 pm-12:50 pm

1 stop32h 50m

Osaka Kansai Intl

Fri 10/31

11:55 am-8:14 pm

2 stops24h 19m

$628

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/21

7:00 am-9:00 pm

2 stops22h 00m

Osaka Kansai Intl

Mon 10/27

6:10 pm-10:00 am

1 stop31h 50m

$634

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 12/2

7:00 am-4:40 pm

1 stop16h 40m

Osaka Kansai Intl

Wed 12/17

8:20 am-1:20 pm

1 stop22h 00m

$672

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 3/8

10:05 am-5:40 pm

1 stop15h 35m

Osaka Kansai Intl

Thu 3/12

7:25 pm-3:01 pm

1 stop11h 36m

$676

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 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 $786. If you aren’t able to travel during the month of February, then book flights to Osaka Kansai Intl Airport from Seattle during September instead. Flights to Osaka Kansai Intl Airport in September, while not as cheap as those in February, still average around $787.

What is the cheapest day to depart on your flight to Osaka Kansai Intl Airport?

The cheapest day to depart from Seattle to Osaka Kansai Intl Airport is on a Thursday. Travelers who choose to depart for Osaka Kansai Intl Airport on a Thursday will often find tickets for as low as $999. Flights from Seattle to Osaka Kansai Intl Airport on a Sunday will generally be more expensive and average around $1,405. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Osaka Kansai Intl Airport?

Our data shows that the cheapest Seattle to Osaka Kansai Intl Airport flights are usually those with departure times in the morning. Our users have found flights to Osaka Kansai Intl Airport in the morning for as low as $1,065. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,566 on average. Flights to Osaka Kansai Intl Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $979 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 $800 on momondo.

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

As of September 2025, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 16% 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

Direct flights

None
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

  • 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 35m.

  • 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 $648Free CancellationRating
8.2
481 reviews
Search Asiana Airlines flights
DeltaPriceFrom $649Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
ANAPriceFrom $670Free CancellationRating
8.4
964 reviews
Search ANA flights
Korean AirPriceFrom $716Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights
China EasternPriceFrom $719Free CancellationRating
7.2
166 reviews
Search China Eastern flights
United AirlinesPriceFrom $797Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $918Free CancellationRating
8.9
215 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $963Free CancellationRating
8.4
1,237 reviews
Search EVA Air flights
China AirlinesPriceFrom $1,017Free CancellationRating
8.3
768 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
Himeji
Izumisano
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
Fri 10/17
Fri 10/24
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 Haneda Airportfrom $497
Flights to Tokyo Narita Airportfrom $374
Flights to Nagoya Chubu Centrair Intl Airportfrom $529
Flights to Osaka Itami Airportfrom $531