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$368+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
feb. 20 — feb. 271
vie. 2/20
vie. 2/27
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 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/238:45 pm
KIX
-
SEA
1 stop15h 58m
Multiple Airlines
mié. 9/308:00 am
SEA
-
KIX
1 stop18h 45m
Multiple Airlines
Deal found 1/20$626
This Flightnetwork deal was found by Cheapflights users on 1/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/177:25 pm
KIX
-
SEA
1 stop30h 06m
Air Canada
dom. 3/228:00 pm
SEA
-
KIX
1 stop29h 40m
Air Canada
Deal found 1/19$627
This Flightnetwork deal was found by Cheapflights users on 1/21. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/306:00 pm
KIX
-
SEA
1 stop31h 15m
Air Canada
mar. 5/53:00 pm
SEA
-
KIX
1 stop33h 25m
Air Canada
Deal found 1/21$648
This Air Canada deal was found by Cheapflights users on 1/21. 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. 4/206:00 pm
KIX
-
SEA
1 stop20h 10m
Air Canada
mar. 5/123:00 pm
SEA
-
KIX
1 stop33h 25m
Air Canada
Deal found 1/21$660
This Air Canada deal was found by Cheapflights users on 1/21. 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. 3/167:25 pm
KIX
-
SEA
1 stop15h 51m
Air Canada
sáb. 3/218:00 pm
SEA
-
KIX
1 stop29h 40m
Air Canada
Deal found 1/21$661
This Flightnetwork deal was found by Cheapflights users on 1/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/177:25 pm
KIX
-
SEA
1 stop18h 41m
Air Canada
mié. 3/255:50 am
SEA
-
KIX
1 stop19h 50m
Air Canada
Deal found 1/19$670
This Air Canada deal was found by Cheapflights users on 1/20. 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 1/20$674
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/226:40 am
KIX
-
SEA
2 stops29h 00m
Multiple Airlines
mié. 9/308:00 am
SEA
-
KIX
1 stop18h 45m
Multiple Airlines
Deal found 1/20$678
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/238:45 pm
KIX
-
SEA
1 stop16h 55m
Multiple Airlines
mar. 9/2910:00 am
SEA
-
KIX
2 stops20h 15m
Multiple Airlines
Deal found 1/20$682
This Korean Air deal was found by Cheapflights users on 1/20. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/216:20 pm
KIX
-
SEA
1 stop32h 20m
Korean Air
jue. 10/112:50 pm
SEA
-
KIX
1 stop36h 15m
Korean Air
Deal found 1/20$692
This Air Canada deal was found by Cheapflights users on 1/21. 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. 4/216:00 pm
KIX
-
SEA
1 stop13h 03m
Air Canada
vie. 5/155:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 1/21$694
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/172:40 pm
ITM
-
SEA
1 stop12h 55m
Multiple Airlines
mar. 2/2412:50 pm
SEA
-
ITM
1 stop14h 05m
Multiple Airlines
Deal found 1/20$878

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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$627
(Flightnetwork)

One-way from

$368
(Kiwi.com)

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 ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 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 21, 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

mar. 3/17

7:25 pm-9:31 am

1 stop30h 06m

Seattle/Tacoma Intl

dom. 3/22

3:40 pm-5:40 pm

1 stop34h 00m

$627

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

jue. 4/30

6:00 pm-9:15 am

1 stop31h 15m

Seattle/Tacoma Intl

mar. 5/5

3:00 pm-4:25 pm

1 stop33h 25m

$648

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

jue. 4/30

6:00 pm-3:03 pm

1 stop13h 03m

Seattle/Tacoma Intl

mié. 5/6

9:55 am-4:25 pm

1 stop14h 30m

$660

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mar. 3/17

8:00 am-10:06 pm

2 stops30h 06m

Seattle/Tacoma Intl

dom. 3/22

3:40 pm-5:40 pm

1 stop34h 00m

$713

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

jue. 4/30

6:00 pm-3:03 pm

1 stop13h 03m

Seattle/Tacoma Intl

mar. 5/5

9:55 am-9:00 am

2 stops31h 05m

$739

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

sáb. 7/18

6:00 pm-9:17 am

1 stop31h 17m

Seattle/Tacoma Intl

vie. 7/24

9:55 am-4:25 pm

1 stop14h 30m

$765

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mié. 4/29

1:25 pm-4:10 pm

1 stop18h 45m

Seattle/Tacoma Intl

lun. 5/4

1:15 am-12:15 pm

1 stop19h 00m

$787

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 3/16

8:00 am-3:01 pm

2 stops23h 01m

Seattle/Tacoma Intl

sáb. 3/21

8:00 pm-5:40 pm

1 stop29h 40m

$844

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mar. 6/23

7:05 pm-8:13 am

2 stops29h 08m

Seattle/Tacoma Intl

mar. 9/15

1:15 am-12:00 pm

1 stop18h 45m

$851

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

mar. 2/17

2:40 pm-10:35 am

1 stop12h 55m

Seattle/Tacoma Intl

mar. 2/24

12:50 pm-7:55 pm

1 stop14h 05m

$878

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 40 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 Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Expedia the most. Expedia 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
No data available for this route at this time. Please check back soon.

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 21, 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

Crew

9.1

Comfort

8.8

Boarding

8.9

Overall

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

Crew

9.1

Comfort

8.8

Boarding

8.9

Overall

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
1,076 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Crew

9.1

Comfort

8.8

Boarding

8.9

Overall

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 $627, Air Canada can have you in Seattle from Osaka in 30h 06m. Osaka and Seattle are separated by a distance of 5024 mi.

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

    For one-way options, check prices for EVA Air. According to our data, you can fly for as low as $309. Users have also found prices from $420 and $424 on Korean Air and Air Canada, 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
Tacoma
SeaTac
Lakewood
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Kirkland
Kent
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Chehalis

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Alternative routes for Osaka to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Kansai Intl to Seattle flights
Osaka Itami to Seattle flights
Kansai Intl to Portland flights

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