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Cheap flights from Seattle to Osaka from $290

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 4/12. 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

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Find the cheapest flights from Seattle to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
9:30 am - 2:55 pm
KIX
-
SEA
21h 25m
1 stop
$611Asiana Airlines
Sun, Apr 12 - Tue, Apr 21
Asiana Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
Asiana Airlines Logo
9:30 am - 2:55 pm
KIX
-
SEA
21h 25m
1 stop
$617Asiana Airlines
Sun, Apr 12 - Mon, Apr 27
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
7:45 pm - 2:55 pm
KIX
-
SEA
35h 10m
1 stop
$619Asiana Airlines
Mon, Apr 20 - Wed, May 13
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
10:40 am - 2:55 pm
KIX
-
SEA
20h 15m
1 stop
$621Asiana Airlines
Sun, Apr 12 - Mon, Apr 27
Japan Airlines Logo
1:15 pm - 7:50 pm
SEA
-
ITM
14h 35m
1 stop
Japan Airlines Logo
2:35 pm - 10:35 am
ITM
-
SEA
12h 00m
1 stop
$694Japan Airlines
Mon, Apr 13 - Thu, May 7
ANA Logo
8:42 am - 7:50 am
SEA
-
UKB
31h 08m
2 stops
ANA Logo
7:05 am - 2:25 pm
UKB
-
SEA
23h 20m
1 stop
$697ANA
Sun, Apr 19 - Fri, May 1
ANA Logo
7:12 am - 5:05 pm
SEA
-
ITM
17h 53m
2 stops
ANA Logo
3:40 pm - 2:25 pm
ITM
-
SEA
14h 45m
1 stop
$698ANA
Tue, Apr 21 - Tue, Apr 28
Korean Air Logo
1:20 pm - 10:55 am
SEA
-
UKB
29h 35m
1 stop
Korean Air Logo
11:55 am - 11:00 am
UKB
-
SEA
15h 05m
1 stop
$715Korean Air
Sun, Jul 19 - Thu, Aug 6
Korean Air Logo
4:15 pm - 10:55 am
SEA
-
UKB
26h 40m
2 stops
Korean Air Logo
11:55 am - 11:00 am
UKB
-
SEA
15h 05m
1 stop
$720Korean Air
Sun, Jul 19 - Thu, Aug 6
Japan Airlines Logo
1:15 pm - 7:50 pm
SEA
-
ITM
14h 35m
1 stop
Japan Airlines Logo
7:25 am - 10:58 pm
ITM
-
SEA
31h 33m
2 stops
$723Japan Airlines
Mon, Apr 13 - Tue, May 5

Air Canada flights from Seattle to Osaka

Our best Air Canada deals on Seattle to Osaka flight tickets
Air Canada
Apr 22
SEA5:40 amSeattle/Tacoma Intl
18h 45m
1 stop
KIX4:25 pmOsaka Kansai Intl
May 4
KIX6:00 pmOsaka Kansai Intl
16h 30m
1 stop
SEA6:30 pmSeattle/Tacoma Intl
$657
Air Canada
Apr 26
SEA3:40 pmSeattle/Tacoma Intl
32h 45m
1 stop
KIX4:25 pmOsaka Kansai Intl
May 12
KIX6:00 pmOsaka Kansai Intl
20h 20m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
$696
Air Canada
Mar 3
SEA8:00 pmSeattle/Tacoma Intl
28h 40m
1 stop
KIX5:40 pmOsaka Kansai Intl
Mar 7
KIX7:25 pmOsaka Kansai Intl
12h 36m
1 stop
SEA3:01 pmSeattle/Tacoma Intl
$780

Delta flights from Seattle to Osaka

Our best Delta deals on Seattle to Osaka flight tickets
Delta
Mar 2
SEA11:30 amSeattle/Tacoma Intl
16h 15m
1 stop
KIX8:45 pmOsaka Kansai Intl
Apr 7
KIX2:15 amOsaka Kansai Intl
26h 52m
1 stop
SEA1:07 pmSeattle/Tacoma Intl
$987
Delta
Mar 1
SEA8:30 pmSeattle/Tacoma Intl
31h 15m
2 stops
KIX8:45 pmOsaka Kansai Intl
Apr 7
KIX6:15 pmOsaka Kansai Intl
32h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$1,265

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Osaka 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 February 22, 2026.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/12

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Tue 4/21

9:30 am-2:55 pm

1 stop21h 25m

$611

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/12

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Mon 4/27

9:30 am-2:55 pm

1 stop21h 25m

$617

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 4/20

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Wed 5/13

7:45 pm-2:55 pm

1 stop35h 10m

$619

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/12

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Mon 4/27

10:40 am-2:55 pm

1 stop20h 15m

$621

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 4/13

1:15 pm-7:50 pm

1 stop14h 35m

Osaka Itami

Thu 5/7

2:35 pm-10:35 am

1 stop12h 00m

$694

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 4/19

8:42 am-7:50 am

2 stops31h 08m

Kobe

Fri 5/1

7:05 am-2:25 pm

1 stop23h 20m

$697

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 4/21

7:12 am-5:05 pm

2 stops17h 53m

Osaka Itami

Tue 4/28

3:40 pm-2:25 pm

1 stop14h 45m

$698

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 7/19

1:20 pm-10:55 am

1 stop29h 35m

Kobe

Thu 8/6

11:55 am-11:00 am

1 stop15h 05m

$715

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 7/19

4:15 pm-10:55 am

2 stops26h 40m

Kobe

Thu 8/6

11:55 am-11:00 am

1 stop15h 05m

$720

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 4/13

1:15 pm-7:50 pm

1 stop14h 35m

Osaka Itami

Tue 5/5

7:25 am-10:58 pm

2 stops31h 33m

$723

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Osaka from

How to get the cheapest flight ticket from Seattle to Osaka

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?

In general, January is the cheapest month to fly from Seattle to Osaka. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $674. If you are unable to visit Osaka during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $679.

How far in advance should I book a flight to Osaka?

You are more likely to see cheaper flights to Osaka from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka from Seattle for as low as $667 on momondo.

Can stopping save me money on Seattle to Osaka flights?

You could potentially save up to 58% on your flight if you consider stops on a Seattle to Osaka flight.

How have Seattle to Osaka flight prices changed over time?

As of February 2026, prices for Seattle to Osaka flights are approximately 30% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Osaka

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

Cheap Seattle to Osaka (SEA to OSA) flight deals and tips

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

Fastest flight time

14h 20m

Direct flights

None
The fastest flight from Seattle to Osaka takes 14h 20m
There are no direct flights from Seattle to Osaka. There are no popular flight routes from Seattle to Osaka.
Search flight deals

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

    The distance between Seattle/Tacoma Intl and Osaka is about 4994.7 mi. Flights usually cover this in 14h 20m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Osaka are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka.

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

    The travel and health documents you'll need for your trip to Osaka 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. 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?

Best airlines flying from Seattle to Osaka

Compare and see reviews for airlines that fly from Seattle to Osaka with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $370Free CancellationRating
8.0
11,935 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $595Free CancellationRating
8.1
504 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,339 reviews
Search United Airlines flights
ANAPriceFrom $649Free CancellationRating
8.4
1,098 reviews
Search ANA flights
Korean AirPriceFrom $660Free CancellationRating
8.4
1,195 reviews
Search Korean Air flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,740 reviews
Search Air Canada flights
Japan AirlinesPriceFrom $697Free CancellationRating
8.3
1,714 reviews
Search Japan Airlines flights
STARLUX AirlinesPriceFrom $934Free CancellationRating
8.9
274 reviews
Search STARLUX Airlines flights

Traveling to a place near Osaka?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Osaka. momondo saves you time and could save you money on your trip.

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 helps you find the best flight between Seattle and Osaka by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Seattle to Osaka now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Osaka and let you know when they change.

An easier way to manage your Osaka 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.
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Find better results for your trip to Japan

Fly into one of these airports located in Osaka

Airports listed have a maximum distance of 22.5 mi from Osaka
Osaka Itami Airport
Osaka Kansai Intl Airport