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Cheap flights from Osaka to Seattle from $389

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 3/23. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:30 pm - 8:05 amKIX-SEA
34h 35m1 stop
Multiple Airlines Logo
7:05 am - 4:40 pmSEA-KIX
16h 35m1 stop
$768Multiple Airlines
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Wed, Dec 24 - Tue, Dec 30
STARLUX Airlines Logo
1:25 pm - 4:10 pmKIX-SEA
18h 45m1 stop
STARLUX Airlines Logo
1:15 am - 12:15 pmSEA-KIX
19h 00m1 stop
$802STARLUX Airlines
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Tue, Apr 28 - Mon, May 4
Asiana Airlines Logo
7:25 pm - 1:55 pmKIX-SEA
35h 30m1 stop
Asiana Airlines Logo
12:10 am - 8:40 amSEA-KIX
15h 30m1 stop
$814Asiana Airlines
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Wed, Dec 24 - Mon, Dec 29
Korean Air Logo
11:55 am - 9:00 amKIX-SEA
14h 05m1 stop
Korean Air Logo
11:00 am - 12:50 pmSEA-KIX
32h 50m1 stop
$818Korean Air
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Thu, Nov 13 - Mon, Nov 17
Korean Air Logo
11:55 am - 9:00 amKIX-SEA
14h 05m1 stop
Korean Air Logo
11:00 am - 10:45 amSEA-KIX
30h 45m1 stop
$819Korean Air
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Thu, Nov 13 - Mon, Nov 17
Asiana Airlines Logo
10:30 am - 1:55 pmKIX-SEA
20h 25m1 stop
Asiana Airlines Logo
12:10 am - 8:40 amSEA-KIX
15h 30m1 stop
$823Asiana Airlines
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Thu, Dec 25 - Mon, Dec 29
EVA Air Logo
6:10 pm - 6:10 pmKIX-SEA
17h 00m1 stop
EVA Air Logo
12:10 am - 9:55 amSEA-KIX
16h 45m1 stop
$868EVA Air
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Wed, Dec 17 - Tue, Dec 23
EVA Air Logo
6:10 pm - 6:10 pmKIX-SEA
17h 00m1 stop
EVA Air Logo
7:23 pm - 11:55 amSEA-KIX
23h 32m2 stops
$951EVA Air
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Wed, Dec 17 - Wed, Dec 24
ANA Logo
4:50 pm - 1:20 pmITM-SEA
13h 30m1 stop
ANA Logo
10:05 am - 7:30 amSEA-ITM
28h 25m2 stops
$1,622ANA
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Thu, Nov 20 - Mon, Nov 24
ANA Logo
6:00 pm - 7:16 pmITM-SEA
18h 16m2 stops
ANA Logo
7:12 pm - 7:30 amSEA-ITM
19h 18m2 stops
$1,756ANA
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Wed, Dec 17 - Wed, Dec 24

STARLUX Airlines flights from Osaka to Seattle

Our best STARLUX Airlines deals on Osaka to Seattle flight tickets
STARLUX Airlines
Apr 28
KIX1:25 pmOsaka Kansai Intl
18h 45m
1 stop
SEA4:10 pmSeattle/Tacoma Intl
May 4
SEA1:15 amSeattle/Tacoma Intl
19h 00m
1 stop
KIX12:15 pmOsaka Kansai Intl
$802
Find similar
STARLUX Airlines
Dec 26
KIX2:00 pmOsaka Kansai Intl
18h 05m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Jan 5
SEA11:45 pmSeattle/Tacoma Intl
18h 25m
1 stop
KIX11:10 amOsaka Kansai Intl
$1,044
Find similar
STARLUX Airlines
Dec 26
KIX12:20 pmOsaka Kansai Intl
19h 45m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Jan 4
SEA11:45 pmSeattle/Tacoma Intl
20h 05m
1 stop
KIX12:50 pmOsaka Kansai Intl
$1,219
Find similar

Asiana Airlines flights from Osaka to Seattle

Our best Asiana Airlines deals on Osaka to Seattle flight tickets
Asiana Airlines
Dec 24
KIX7:25 pmOsaka Kansai Intl
35h 30m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Dec 29
SEA12:10 amSeattle/Tacoma Intl
15h 30m
1 stop
KIX8:40 amOsaka Kansai Intl
$814
Find similar
Asiana Airlines
Dec 25
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Dec 29
SEA12:10 amSeattle/Tacoma Intl
15h 30m
1 stop
KIX8:40 amOsaka Kansai Intl
$823
Find similar
Asiana Airlines
Nov 13
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Nov 16
SEA12:10 amSeattle/Tacoma Intl
24h 55m
1 stop
KIX6:05 pmOsaka Kansai Intl
$856
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 November 3, 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

Wed 12/24

2:30 pm-8:05 am

1 stop34h 35m

Seattle/Tacoma Intl

Tue 12/30

7:05 am-4:40 pm

1 stop16h 35m

$768

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 4/28

1:25 pm-4:10 pm

1 stop18h 45m

Seattle/Tacoma Intl

Mon 5/4

1:15 am-12:15 pm

1 stop19h 00m

$802

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 12/24

7:25 pm-1:55 pm

1 stop35h 30m

Seattle/Tacoma Intl

Mon 12/29

12:10 am-8:40 am

1 stop15h 30m

$814

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 11/13

11:55 am-9:00 am

1 stop14h 05m

Seattle/Tacoma Intl

Mon 11/17

11:00 am-12:50 pm

1 stop32h 50m

$818

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 11/13

11:55 am-9:00 am

1 stop14h 05m

Seattle/Tacoma Intl

Mon 11/17

11:00 am-10:45 am

1 stop30h 45m

$819

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 12/25

10:30 am-1:55 pm

1 stop20h 25m

Seattle/Tacoma Intl

Mon 12/29

12:10 am-8:40 am

1 stop15h 30m

$823

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 12/17

6:10 pm-6:10 pm

1 stop17h 00m

Seattle/Tacoma Intl

Tue 12/23

12:10 am-9:55 am

1 stop16h 45m

$868

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 12/17

6:10 pm-6:10 pm

1 stop17h 00m

Seattle/Tacoma Intl

Wed 12/24

7:23 pm-11:55 am

2 stops23h 32m

$951

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Thu 11/20

4:50 pm-1:20 pm

1 stop13h 30m

Seattle/Tacoma Intl

Mon 11/24

10:05 am-7:30 am

2 stops28h 25m

$1,622

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Wed 12/17

6:00 pm-7:16 pm

2 stops18h 16m

Seattle/Tacoma Intl

Wed 12/24

7:12 pm-7:30 am

2 stops19h 18m

$1,756

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 November 2025, prices for Osaka to Seattle flights are approximately 6% more expensive 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

Direct flights

None
There are no direct flights from Osaka to Seattle. There are no popular flight routes from Osaka to Seattle.
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  • 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 50m.

  • 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 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?

Traveling to a place near Seattle?

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

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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