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$388+ Cheap flights from Osaka (OSA) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
1 adult, Economy
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Cheap flight deals from Osaka to Seattle

Cheapest flights from Osaka to Seattle
Explore the most affordable flight options available from Osaka to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 29, 2026.

This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/236:00 pm
KIX
-
SEA
1 stop16h 32m
Air Canada
mié. 9/165:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 1/28$651
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/36:00 pm
KIX
-
SEA
1 stop20h 22m
Air Canada
lun. 8/175:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 1/26$655
This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/27:25 pm
KIX
-
SEA
1 stop12h 36m
Air Canada
sáb. 3/78:00 pm
SEA
-
KIX
1 stop28h 40m
Air Canada
Deal found 1/28$680
This Gotogate deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/196:05 pm
KIX
-
SEA
1 stop12h 11m
Air Canada
vie. 10/235:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 1/26$703
This Expedia deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/147:25 pm
KIX
-
SEA
1 stop30h 10m
Air Canada
sáb. 3/218:00 pm
SEA
-
KIX
1 stop29h 40m
Air Canada
Deal found 1/29$714
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/126:05 pm
KIX
-
SEA
1 stop20h 11m
Air Canada
sáb. 9/267:45 pm
SEA
-
KIX
1 stop28h 40m
Air Canada
Deal found 1/26$720
This Air Canada deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/147:25 pm
KIX
-
SEA
1 stop19h 31m
Air Canada
dom. 3/225:50 am
SEA
-
KIX
1 stop19h 50m
Air Canada
Deal found 1/29$745
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/36:00 pm
KIX
-
SEA
1 stop20h 22m
Multiple Airlines
lun. 8/179:55 am
SEA
-
KIX
2 stops19h 05m
Multiple Airlines
Deal found 1/27$749
This Gotogate deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/28:00 am
KIX
-
SEA
2 stops31h 57m
Multiple Airlines
sáb. 3/73:40 pm
SEA
-
KIX
1 stop33h 00m
Multiple Airlines
Deal found 1/28$753
This Air Canada deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/232:05 pm
ITM
-
SEA
2 stops24h 51m
Air Canada
mar. 1/510:35 am
SEA
-
ITM
2 stops15h 20m
Air Canada
Deal found 1/29$813
This Expedia deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 1/292:05 pm
ITM
-
SEA
2 stops17h 26m
Air Canada
dom. 2/18:00 pm
SEA
-
ITM
2 stops29h 55m
Air Canada
Deal found 1/27$906
This Priceline deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/232:05 pm
ITM
-
SEA
2 stops24h 51m
Multiple Airlines
mar. 1/511:55 am
SEA
-
ITM
1 stop15h 00m
Multiple Airlines
Deal found 1/29$936

Find flight deals from Osaka to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Osaka (OSA) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$651
(Air Canada)

One-way from

$388
(oojo)

Popular in

September

Cheapest in

May
Provider with most accurate pricing for Osaka (OSA)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Osaka (OSA)-Seattle/Tacoma Intl flights.
Search Deals
From Osaka (OSA) to Seattle/Tacoma Intl
Search Deals
One-way flight from Osaka (OSA) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated enero 29, 2026.
Use the filters below to find and compare flights from Osaka to Seattle that are best for you.

Fly from

Osaka

Fly to

Seattle

Route

Depart

Return

Price

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 3/2

7:25 pm-3:01 pm

1 stop12h 36m

Seattle/Tacoma Intl

sáb. 3/7

8:00 pm-5:40 pm

1 stop28h 40m

$680

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

sáb. 3/14

7:25 pm-10:56 pm

1 stop19h 31m

Seattle/Tacoma Intl

dom. 3/22

5:50 am-5:40 pm

1 stop19h 50m

$745

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

vie. 3/13

2:35 pm-9:00 am

1 stop34h 25m

Seattle/Tacoma Intl

dom. 3/22

10:30 pm-7:35 pm

1 stop29h 05m

$765

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

vie. 3/6

7:25 pm-1:55 pm

1 stop35h 30m

Seattle/Tacoma Intl

lun. 3/9

12:10 am-6:05 pm

1 stop25h 55m

$789

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

dom. 3/15

7:25 pm-2:55 pm

1 stop35h 30m

Seattle/Tacoma Intl

sáb. 3/21

12:10 am-6:05 pm

1 stop25h 55m

$859

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

dom. 3/15

9:05 pm-9:00 am

2 stops51h 55m

Seattle/Tacoma Intl

dom. 3/22

10:30 pm-7:35 pm

1 stop29h 05m

$878

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

sáb. 3/21

9:00 am-2:55 pm

1 stop21h 55m

Seattle/Tacoma Intl

vie. 3/27

12:10 am-9:40 am

1 stop17h 30m

$920

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mar. 3/17

7:05 pm-5:01 pm

2 stops37h 56m

Seattle/Tacoma Intl

mié. 3/25

5:55 pm-2:55 pm

3 stops29h 00m

$989

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 3/2

4:15 pm-1:59 pm

3 stops38h 44m

Seattle/Tacoma Intl

sáb. 3/7

6:21 pm-9:05 pm

2 stops33h 44m

$990

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

lun. 3/2

2:35 pm-11:07 pm

2 stops25h 32m

Seattle/Tacoma Intl

sáb. 3/7

3:45 pm-7:30 am

1 stop22h 45m

$1,051

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 38 results
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Compare providers for flights from Osaka to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Osaka to Seattle in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Osaka-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Osaka-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Osaka-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Osaka-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Osaka-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Osaka to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Osaka with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Osaka to Seattle

How much does it cost to fly round-trip from Osaka to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated enero 29, 2026.
See what other customers who have flown with STARLUX Airlines and ANA from Osaka to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Crew

9.1

Comfort

8.8

Boarding

8.9

Entertainment

8.8

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
268 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Crew

9.1

Comfort

8.8

Boarding

8.9

Entertainment

8.8

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
ANA
8.4
Very good
1,078 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Crew

9.1

Comfort

8.8

Boarding

8.9

Entertainment

8.8

Food

8.6

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Related info for your journey

Find useful and relevant information for your journey from Osaka to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Osaka?

    If you book a flight to Seattle from Osaka, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Osaka to Seattle/Tacoma Intl per day from 0 different airlines.

  • How long is the flight from Osaka to Seattle?

    For as low as $680, Air Canada can have you in Seattle from Osaka in 12h 36m. Osaka and Seattle are separated by a distance of 5024 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Osaka to Seattle one-way?

    For one-way options, check prices for Korean Air. According to our data, you can fly for as low as $420. Users have also found prices from $424 and $482 on Air Canada and China Airlines, respectively.

  • Can I find deals for flights from Osaka to Seattle that include hotel bookings?

    Yes. In addition to deals on Osaka to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Osaka to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Osaka to Seattle.

  • Can I find deals for business class flights from Osaka to Seattle?

    Yes. Cheapflights offers flight deals from Osaka to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
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Alternative routes for Osaka to Seattle

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Kansai Intl to Seattle flights
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