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Cheap flights from Osaka to Seattle from $439

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Osaka to Seattle departing on 9/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Osaka to Seattle

Cheap round-trip flights

Logo
12:35 pm - 12:30 pmKIX-SEA
15h 55m1 stop
Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
$687
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Tue, Sep 23 - Mon, Sep 29
Logo
12:35 pm - 12:30 pmKIX-SEA
15h 55m1 stop
Logo
2:15 pm - 5:50 pmSEA-KIX
35h 35m1 stop
$688
Find Deal
Tue, Sep 23 - Thu, Sep 25
Asiana Airlines Logo
9:10 am - 12:30 pmKIX-SEA
19h 20m1 stop
Asiana Airlines Logo
2:15 pm - 3:50 pmSEA-KIX
33h 35m1 stop
$717Asiana Airlines
Find Deal
Sun, Sep 14 - Sun, Sep 21
Asiana Airlines Logo
10:50 am - 12:30 pmKIX-SEA
17h 40m1 stop
Asiana Airlines Logo
2:15 pm - 9:40 amSEA-KIX
27h 25m1 stop
$720Asiana Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
China Airlines Logo
2:00 pm - 7:45 pmKIX-SEA
21h 45m1 stop
China Airlines Logo
1:10 am - 12:00 pmSEA-KIX
18h 50m1 stop
$813China Airlines
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Sun, Sep 14 - Sat, Sep 20
China Airlines Logo
2:00 pm - 7:20 pmKIX-SEA
21h 20m1 stop
China Airlines Logo
1:10 am - 12:00 pmSEA-KIX
18h 50m1 stop
$814China Airlines
Find Deal
Tue, Sep 23 - Sun, Sep 28
EVA Air Logo
1:10 pm - 7:30 pmKIX-SEA
22h 20m1 stop
EVA Air Logo
12:30 am - 10:10 amSEA-KIX
17h 40m1 stop
$886EVA Air
Find Deal
Fri, Sep 12 - Thu, Sep 18
EVA Air Logo
11:10 am - 7:50 pmKIX-SEA
24h 40m1 stop
EVA Air Logo
1:30 am - 10:10 amSEA-KIX
16h 40m1 stop
$906EVA Air
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Sat, Aug 30 - Fri, Sep 12
ANA Logo
4:50 pm - 2:25 pmITM-SEA
13h 35m1 stop
ANA Logo
4:30 pm - 9:05 amSEA-ITM
24h 35m1 stop
$1,628ANA
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Wed, Aug 20 - Wed, Sep 3
ANA Logo
6:00 pm - 2:25 pmITM-SEA
12h 25m1 stop
ANA Logo
4:30 pm - 9:05 amSEA-ITM
24h 35m1 stop
$1,637ANA
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Wed, Aug 20 - Wed, Sep 3

Asiana Airlines flights from Osaka to Seattle

Our best Asiana Airlines deals on Osaka to Seattle flight tickets
Asiana Airlines
Sep 14
KIX9:10 amOsaka Kansai Intl
19h 20m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Sep 21
SEA2:15 pmSeattle/Tacoma Intl
33h 35m
1 stop
KIX3:50 pmOsaka Kansai Intl
$717
Find similar
Asiana Airlines
Sep 25
KIX10:50 amOsaka Kansai Intl
17h 40m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Sep 27
SEA2:15 pmSeattle/Tacoma Intl
27h 25m
1 stop
KIX9:40 amOsaka Kansai Intl
$720
Find similar
Asiana Airlines
Sep 24
KIX10:50 amOsaka Kansai Intl
17h 40m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
Sep 28
SEA2:15 pmSeattle/Tacoma Intl
35h 35m
1 stop
KIX5:50 pmOsaka Kansai Intl
$757
Find similar

Japan Airlines flights from Osaka to Seattle

Our best Japan Airlines deals on Osaka to Seattle flight tickets
Japan Airlines
Aug 20
ITM2:35 pmOsaka Itami
12h 00m
1 stop
SEA10:35 amSeattle/Tacoma Intl
Sep 3
SEA8:37 amSeattle/Tacoma Intl
19h 08m
2 stops
ITM7:45 pmOsaka Itami
$1,665
Find similar
Japan Airlines
Aug 20
ITM2:35 pmOsaka Itami
12h 00m
1 stop
SEA10:35 amSeattle/Tacoma Intl
Sep 3
SEA8:37 amSeattle/Tacoma Intl
19h 08m
2 stops
ITM7:45 pmOsaka Itami
$1,674
Find similar
Japan Airlines
Aug 21
ITM2:35 pmOsaka Itami
12h 00m
1 stop
SEA10:35 amSeattle/Tacoma Intl
Sep 8
SEA8:37 amSeattle/Tacoma Intl
19h 08m
2 stops
ITM7:45 pmOsaka Itami
$1,677
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Osaka to Seattle 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 July 31, 2025.
Use the filters below to find and compare flights from Osaka to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 9/23

12:35 pm-12:30 pm

1 stop15h 55m

Seattle/Tacoma Intl

Mon 9/29

2:15 pm-5:50 pm

1 stop35h 35m

$687

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 9/23

12:35 pm-12:30 pm

1 stop15h 55m

Seattle/Tacoma Intl

Thu 9/25

2:15 pm-5:50 pm

1 stop35h 35m

$688

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 9/14

9:10 am-12:30 pm

1 stop19h 20m

Seattle/Tacoma Intl

Sun 9/21

2:15 pm-3:50 pm

1 stop33h 35m

$717

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 9/25

10:50 am-12:30 pm

1 stop17h 40m

Seattle/Tacoma Intl

Sat 9/27

2:15 pm-9:40 am

1 stop27h 25m

$720

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 9/14

2:00 pm-7:45 pm

1 stop21h 45m

Seattle/Tacoma Intl

Sat 9/20

1:10 am-12:00 pm

1 stop18h 50m

$813

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 9/23

2:00 pm-7:20 pm

1 stop21h 20m

Seattle/Tacoma Intl

Sun 9/28

1:10 am-12:00 pm

1 stop18h 50m

$814

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 9/12

1:10 pm-7:30 pm

1 stop22h 20m

Seattle/Tacoma Intl

Thu 9/18

12:30 am-10:10 am

1 stop17h 40m

$886

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 8/30

11:10 am-7:50 pm

1 stop24h 40m

Seattle/Tacoma Intl

Fri 9/12

1:30 am-10:10 am

1 stop16h 40m

$906

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Wed 8/20

4:50 pm-2:25 pm

1 stop13h 35m

Seattle/Tacoma Intl

Wed 9/3

4:30 pm-9:05 am

1 stop24h 35m

$1,628

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Wed 8/20

6:00 pm-2:25 pm

1 stop12h 25m

Seattle/Tacoma Intl

Wed 9/3

4:30 pm-9:05 am

1 stop24h 35m

$1,637

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 Seattle from

How to get the cheapest flight ticket from Osaka to Seattle

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 day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Osaka is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $916. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Osaka because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,184.

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

Flying to Seattle from Osaka in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,034 when looking at flights departing in the morning. Flights to Seattle are more costly in the afternoon, with an average ticket price of $1,134. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

How have Osaka to Seattle flight prices changed over time?

As of July 2025, prices for Osaka to Seattle flights are approximately 35% cheaper when compared to flights at the same time last year.

When to book flights from Osaka to Seattle

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

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

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

Best Price Found

$439

Fastest flight time

11h 45m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Osaka in the past 72 hours is $439. The best round-trip flight deal from Osaka to Seattle found on momondo in the last 72 hours is $687.
The fastest flight from Osaka to Seattle takes 11h 45m
There are no direct flights from Osaka to Seattle. Popular non-direct routes for this connection are Osaka Itami Airport - Seattle/Tacoma Intl Airport and Osaka Kansai Intl Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

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

    The straight-line distance from Osaka to Seattle/Tacoma Intl is 4994.7 mi. By plane, this route typically takes 11h 45m.

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

    Prices for flights from Osaka to Seattle/Tacoma Intl Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Osaka to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Osaka to Seattle?

Best airlines flying from Osaka to Seattle

Compare and see reviews for airlines that fly from Osaka to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Asiana AirlinesPriceFrom $852Free CancellationRating
8.2
468 reviews
Search Asiana Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Puyallup
Lynnwood
Marysville
Tukwila
Kirkland
Lakewood
Fife
Centralia
Cle Elum
Shoreline
Westport
Redmond

Why use momondo?

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

Finding the right flight to Seattle from Osaka is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Osaka to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Osaka which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Osaka to Seattle?

Once you have performed a search for Osaka to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Osaka to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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