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Cheap flights from Seattle to Osaka from $319

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 1/31. 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.
Air Canada Logo
10:05 am - 6:55 pmSEA-ITM
15h 50m2 stops
Air Canada Logo
2:05 pm - 2:31 pmITM-SEA
17h 26m2 stops
$600Air Canada
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Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
8:00 pm - 8:35 pmSEA-KIX
31h 35m2 stops
Multiple Airlines Logo
10:50 am - 7:16 pmKIX-SEA
25h 26m2 stops
$607Multiple Airlines
Find Deal
Tue, Jan 20 - Tue, Jan 27
ANA Logo
3:45 pm - 10:20 pmSEA-KIX
13h 35m1 stop
ANA Logo
5:35 pm - 2:20 pmKIX-SEA
12h 45m1 stop
$614ANA
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Thu, Feb 26 - Sun, Mar 15
Korean Air Logo
11:00 am - 12:50 pmSEA-KIX
32h 50m1 stop
Korean Air Logo
11:55 am - 9:00 amKIX-SEA
14h 05m1 stop
$622Korean Air
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Sat, Jan 17 - Sat, Jan 24
Japan Airlines Logo
12:30 pm - 7:55 pmSEA-ITM
14h 25m1 stop
Japan Airlines Logo
2:40 pm - 9:55 amITM-SEA
12h 15m1 stop
$625Japan Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Korean Air Logo
11:00 am - 10:10 amSEA-UKB
30h 10m1 stop
Korean Air Logo
6:40 pm - 9:00 amUKB-SEA
31h 20m1 stop
$625Korean Air
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Wed, Feb 4 - Sat, Feb 28
Asiana Airlines Logo
12:10 am - 6:05 pmSEA-KIX
24h 55m1 stop
Asiana Airlines Logo
10:30 am - 2:55 pmKIX-SEA
20h 25m1 stop
$627Asiana Airlines
Find Deal
Sat, Mar 7 - Wed, Mar 18
Japan Airlines Logo
12:30 pm - 7:55 pmSEA-ITM
14h 25m1 stop
Japan Airlines Logo
2:40 pm - 8:58 amITM-SEA
35h 18m2 stops
$628Japan Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Asiana Airlines Logo
12:10 am - 8:50 amSEA-KIX
15h 40m1 stop
Asiana Airlines Logo
10:30 am - 1:55 pmKIX-SEA
20h 25m1 stop
$632Asiana Airlines
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Mon, Dec 1 - Tue, Dec 9
ANA Logo
3:45 pm - 8:00 amSEA-UKB
23h 15m1 stop
ANA Logo
7:05 am - 1:20 pmUKB-SEA
23h 15m1 stop
$638ANA
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Thu, Feb 19 - Sun, Mar 8

ANA flights from Seattle to Osaka

Our best ANA deals on Seattle to Osaka flight tickets
ANA
Feb 26
SEA3:45 pmSeattle/Tacoma Intl
13h 35m
1 stop
KIX10:20 pmOsaka Kansai Intl
Mar 15
KIX5:35 pmOsaka Kansai Intl
12h 45m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$614
Find similar
ANA
Feb 19
SEA3:45 pmSeattle/Tacoma Intl
23h 15m
1 stop
UKB8:00 amKobe
Mar 8
UKB7:05 amKobe
23h 15m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$638
Find similar
ANA
Feb 19
SEA7:15 amSeattle/Tacoma Intl
16h 25m
1 stop
KIX4:40 pmOsaka Kansai Intl
Mar 8
KIX5:35 pmOsaka Kansai Intl
12h 45m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$639
Find similar

Asiana Airlines flights from Seattle to Osaka

Our best Asiana Airlines deals on Seattle to Osaka flight tickets
Asiana Airlines
Mar 7
SEA12:10 amSeattle/Tacoma Intl
24h 55m
1 stop
KIX6:05 pmOsaka Kansai Intl
Mar 18
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$627
Find similar
Asiana Airlines
Dec 1
SEA12:10 amSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:50 amOsaka Kansai Intl
Dec 9
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$632
Find similar
Asiana Airlines
Apr 13
SEA12:10 amSeattle/Tacoma Intl
17h 30m
1 stop
KIX9:40 amOsaka Kansai Intl
Apr 21
KIX10:50 amOsaka Kansai Intl
20h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$634
Find similar

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 November 21, 2025.
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 - ITM

SEAITM

Seattle/Tacoma Intl

Tue 1/13

10:05 am-6:55 pm

2 stops15h 50m

Osaka Itami

Tue 1/20

2:05 pm-2:31 pm

2 stops17h 26m

$600

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 1/20

8:00 pm-8:35 pm

2 stops31h 35m

Osaka Kansai Intl

Tue 1/27

10:50 am-7:16 pm

2 stops25h 26m

$607

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 2/26

3:45 pm-10:20 pm

1 stop13h 35m

Osaka Kansai Intl

Sun 3/15

5:35 pm-2:20 pm

1 stop12h 45m

$614

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/17

11:00 am-12:50 pm

1 stop32h 50m

Osaka Kansai Intl

Sat 1/24

11:55 am-9:00 am

1 stop14h 05m

$622

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 1/13

12:30 pm-7:55 pm

1 stop14h 25m

Osaka Itami

Tue 1/20

2:40 pm-9:55 am

1 stop12h 15m

$625

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Wed 2/4

11:00 am-10:10 am

1 stop30h 10m

Kobe

Sat 2/28

6:40 pm-9:00 am

1 stop31h 20m

$625

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 3/7

12:10 am-6:05 pm

1 stop24h 55m

Osaka Kansai Intl

Wed 3/18

10:30 am-2:55 pm

1 stop20h 25m

$627

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 1/13

12:30 pm-7:55 pm

1 stop14h 25m

Osaka Itami

Tue 1/20

2:40 pm-8:58 am

2 stops35h 18m

$628

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 12/1

12:10 am-8:50 am

1 stop15h 40m

Osaka Kansai Intl

Tue 12/9

10:30 am-1:55 pm

1 stop20h 25m

$632

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Thu 2/19

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Sun 3/8

7:05 am-1:20 pm

1 stop23h 15m

$638

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, September 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 $735. If you are unable to visit Osaka during the month of September, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $736.

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

According to our data, Tuesday is the cheapest day to fly to Osaka from Seattle. The lowest ticket price found for a Tuesday departure recently was $1,071. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Osaka for around $1,160.

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

Our data shows that the cheapest Seattle to Osaka flights are usually those with departure times in the evening. Our users have found flights to Osaka in the evening for as low as $994. Flights to Osaka are more costly in the afternoon, with an average ticket price of $1,459. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $948 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 $762 on momondo.

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

Direct flights

None
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 13h 15m, 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
Asiana AirlinesPriceFrom $610Free CancellationRating
8.2
488 reviews
Search Asiana Airlines flights
DeltaPriceFrom $649Free CancellationRating
7.9
8,002 reviews
Search Delta flights
ANAPriceFrom $660Free CancellationRating
8.4
1,009 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,463 reviews
Search Air Canada flights
Japan AirlinesPriceFrom $697Free CancellationRating
8.3
1,624 reviews
Search Japan Airlines flights
Korean AirPriceFrom $716Free CancellationRating
8.4
1,170 reviews
Search Korean Air flights
United AirlinesPriceFrom $734Free CancellationRating
7.4
9,029 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $975Free CancellationRating
8.9
232 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $1,056Free CancellationRating
8.3
782 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
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

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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