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$325+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 December 16, 2025.

This oojo deal was found by Cheapflights users on 12/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:55 pmKIX - SEA
1 stop22h 15mEVA Air
Thu 1/112:10 amSEA - KIX
1 stop16h 45mEVA Air
Deal found 12/15$826
This Asiana Airlines deal was found by Cheapflights users on 12/16. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Mon 12/2912:10 amSEA - KIX
1 stop15h 40mAsiana Airlines
Deal found 12/16$842
This STARLUX Airlines deal was found by Cheapflights users on 12/15. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:20 pmKIX - SEA
1 stop19h 45mSTARLUX Airlines
Tue 12/3011:45 pmSEA - KIX
1 stop20h 05mSTARLUX Airlines
Deal found 12/15$1,179
This Cathay Pacific deal was found by Cheapflights users on 12/15. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:55 pmKIX - SEA
2 stops33h 07mCathay Pacific
Tue 12/307:09 amSEA - KIX
2 stops30h 11mCathay Pacific
Deal found 12/15$1,192
This Ovago deal was found by Cheapflights users on 12/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:15 pmKIX - SEA
3 stops33h 47mCathay Pacific
Fri 1/24:49 pmSEA - KIX
2 stops26h 56mCathay Pacific
Deal found 12/15$1,241
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/171:00 pmITM - SEA
2 stops37h 31mUnited Airlines
Sat 12/203:40 pmSEA - ITM
2 stops57h 30mUnited Airlines
Deal found 12/16$2,346
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/172:40 pmITM - SEA
1 stop13h 10mMultiple Airlines
Sat 12/2012:30 pmSEA - ITM
1 stop14h 25mMultiple Airlines
Deal found 12/16$2,787

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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$683
(Delta)

One-way from

$325
(Kiwi.com)

Popular in

September

Cheapest in

May

Average price

$846
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. 9% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 16, 2025.
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

Thu 1/29

9:00 am-1:20 pm

1 stop21h 20m

Seattle/Tacoma Intl

Thu 2/5

11:25 am-8:45 pm

1 stop16h 20m

$683

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 3/3

7:25 pm-10:51 pm

1 stop20h 26m

Seattle/Tacoma Intl

Wed 3/18

10:05 am-5:40 pm

1 stop15h 35m

$699

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 1/26

10:50 am-7:16 pm

2 stops25h 26m

Seattle/Tacoma Intl

Thu 1/29

5:50 am-8:35 pm

2 stops21h 45m

$770

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Fri 1/23

4:30 pm-7:22 pm

2 stops19h 52m

Seattle/Tacoma Intl

Tue 1/27

6:38 pm-11:45 am

2 stops24h 07m

$809

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 1/29

8:00 am-2:20 pm

2 stops23h 20m

Seattle/Tacoma Intl

Thu 2/5

3:45 pm-10:20 pm

1 stop13h 35m

$822

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 1/31

8:00 am-10:06 pm

2 stops31h 06m

Seattle/Tacoma Intl

Sat 2/7

3:40 pm-1:25 pm

2 stops52h 45m

$827

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 1/21

9:00 am-1:55 pm

1 stop21h 55m

Seattle/Tacoma Intl

Fri 1/23

12:10 am-8:55 pm

1 stop27h 45m

$847

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Thu 1/29

2:05 pm-9:31 am

2 stops36h 26m

Seattle/Tacoma Intl

Thu 2/5

5:50 am-6:55 pm

2 stops20h 05m

$851

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Thu 1/29

2:05 pm-2:20 pm

2 stops17h 15m

Seattle/Tacoma Intl

Thu 2/5

3:45 pm-7:30 am

1 stop22h 45m

$860

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 3/3

10:55 am-8:47 pm

2 stops26h 52m

Seattle/Tacoma Intl

Tue 3/17

1:10 am-4:55 pm

1 stop23h 45m

$927

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 31 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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Osaka-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

What is the cheapest time of day to fly from OSA to SEA?

Find hourly flight availability from Osaka to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Osaka to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the morning.

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 December 16, 2025.
See what other customers who have flown with STARLUX Airlines, EVA Air, 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
245 reviews

Food

8.7

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.2

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very good
245 reviews
STARLUX Airlines
8.9
Very good
245 reviews

Food

8.7

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.2

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
EVA Air
8.5
Very good
1,297 reviews
STARLUX Airlines
8.9
Very good
245 reviews

Food

8.7

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.2

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
ANA
8.4
Very good
1,025 reviews
STARLUX Airlines
8.9
Very good
245 reviews

Food

8.7

Comfort

8.8

Boarding

8.9

Overall

8.9

Entertainment

8.8

Crew

9.2

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

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 $809, Delta can have you in Seattle from Osaka in 19h 52m. Osaka and Seattle are separated by a distance of 4999 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 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
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Lakewood
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Puyallup
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Kent
Tukwila
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Centralia
Federal Way

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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.
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