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$424+ Cheap flights from Seattle (SEA) to Osaka (OSA)

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
May 19 — May 261
Mon 5/19
Mon 5/26
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka are usually found in February or January, booked 12 days in advance, depart on a Tuesday or Saturday and return on a Wednesday

Cheap flight deals from Seattle to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Osaka (OSA). 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 May 14, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$743
(Cheapflightsfares)

One-way from

$424
(Air Canada)

Popular in

December

Cheapest in

February

Average price

$1,009
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka (OSA) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka (OSA) flights.
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From Seattle/Tacoma Intl to Osaka (OSA)
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One-way flight from Seattle/Tacoma Intl to Osaka (OSA)
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Highest demand for flights based on searches. 7% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Seattle to Osaka

Cheapest flights from Seattle to Osaka
Explore the most affordable flight options available from Seattle to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 14, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 5/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:35 pmSEA - KIX
1 stop22h 45mPhilippine Airlines
Sun 10/123:20 pmKIX - SEA
1 stop19h 55mPhilippine Airlines
Deal found 5/14$743
This Air Canada deal was found by Cheapflights users on 5/13. 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.
Mon 9/810:00 amSEA - KIX
1 stop14h 25mAir Canada
Tue 9/166:05 pmKIX - SEA
1 stop16h 31mAir Canada
Deal found 5/13$749
This Cheapflightsfares deal was found by Cheapflights users on 5/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/53:40 pmSEA - ITM
1 stop22h 50mANA
Fri 11/144:50 pmITM - SEA
1 stop13h 30mANA
Deal found 5/13$814
This Cheapflightsfares deal was found by Cheapflights users on 5/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:36 amSEA - KIX
1 stop17h 59mANA
Thu 11/2011:05 amKIX - SEA
1 stop19h 15mANA
Deal found 5/14$815
This FlightHub deal was found by Cheapflights users on 5/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/112:50 pmSEA - UKB
1 stop29h 10mKorean Air
Tue 9/1611:00 amUKB - SEA
1 stop15h 40mKorean Air
Deal found 5/13$816
This Air Canada deal was found by Cheapflights users on 5/13. 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.
Mon 11/310:00 amSEA - ITM
2 stops15h 55mAir Canada
Tue 11/112:05 pmITM - SEA
2 stops17h 21mAir Canada
Deal found 5/13$817
This FlightHub deal was found by Cheapflights users on 5/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/274:35 pmSEA - UKB
2 stops23h 25mANA
Mon 11/109:05 pmUKB - SEA
1 stop33h 15mANA
Deal found 5/13$827
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Mon 11/245:36 amSEA - KIX
1 stop17h 59mUnited Airlines
Wed 12/38:25 amKIX - SEA
1 stop21h 55mUnited Airlines
Deal found 5/13$833
This FlightHub deal was found by Cheapflights users on 5/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/92:15 pmSEA - KIX
1 stop27h 25mAsiana Airlines
Sun 9/2110:50 amKIX - SEA
1 stop17h 40mAsiana Airlines
Deal found 5/14$834
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Sun 11/95:36 amSEA - ITM
2 stops19h 34mUnited Airlines
Tue 11/181:00 pmITM - SEA
1 stop17h 20mUnited Airlines
Deal found 5/14$836
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Tue 11/186:30 amSEA - ITM
2 stops21h 05mMultiple Airlines
Tue 11/251:00 pmITM - SEA
1 stop17h 20mMultiple Airlines
Deal found 5/13$837
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Tue 9/97:00 amSEA - KIX
2 stops18h 55mMultiple Airlines
Tue 9/168:25 amKIX - SEA
1 stop22h 00mMultiple Airlines
Deal found 5/13$840

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Osaka 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 May 14, 2025.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Seattle

Fly to

Osaka

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 5/18

11:35 pm-2:20 pm

1 stop22h 45m

Osaka Kansai Intl

Sun 5/25

3:20 pm-7:15 pm

1 stop19h 55m

$762

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 11/5

3:40 pm-7:30 am

1 stop22h 50m

Osaka Itami

Fri 11/14

4:50 pm-1:20 pm

1 stop13h 30m

$814

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 11/3

10:00 am-6:55 pm

2 stops15h 55m

Osaka Itami

Tue 11/11

2:05 pm-2:26 pm

2 stops17h 21m

$817

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 9/24

6:45 am-7:10 pm

2 stops20h 25m

Osaka Itami

Tue 10/7

12:00 pm-2:25 pm

1 stop18h 25m

$837

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 10/21

4:30 pm-5:05 pm

1 stop32h 35m

Osaka Itami

Thu 10/30

1:00 pm-8:49 pm

3 stops23h 49m

$842

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 7/9

2:30 pm-7:20 pm

1 stop36h 50m

Osaka Kansai Intl

Fri 7/18

8:40 pm-12:45 pm

1 stop32h 05m

$881

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 6/3

1:20 pm-5:30 pm

1 stop36h 10m

Kobe

Tue 6/10

11:00 am-10:50 am

1 stop15h 50m

$929

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 6/3

1:20 pm-9:00 pm

1 stop15h 40m

Osaka Kansai Intl

Tue 6/10

6:20 pm-10:50 am

1 stop32h 30m

$931

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Sun 6/1

8:41 am-8:25 pm

2 stops19h 44m

Osaka Itami

Fri 6/13

8:35 am-10:35 am

2 stops18h 00m

$934

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Thu 7/10

4:30 pm-7:50 am

1 stop23h 20m

Kobe

Tue 7/22

7:05 am-2:25 pm

1 stop23h 20m

$961

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 45 results
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Compare providers for flights from Seattle to Osaka

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 Seattle to Osaka in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 Seattle-Osaka flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Osaka flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Seattle-Osaka flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Osaka flights, Cheapflights users trust AranGrant the most. AranGrant 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 Seattle-Osaka 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 Seattle to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from Seattle 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 Seattle to Osaka

How far ahead should I book a flight from Seattle to Osaka?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Osaka. Price data was last updated on May 9, 2025.

The price you pay for your flight from Seattle to Osaka may vary depending on when you book. For the best chance of a lower fare, look to book 11 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Osaka?

Currently, February is the cheapest month in which you can book a flight from Seattle to Osaka (average of $892). Flying from Seattle to Osaka in December is currently the most expensive (average of $1,330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Seattle to Osaka. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 14, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% on flights from Seattle to Osaka by exploring options for tickets in the evening.

What is the cheapest day to fly from Seattle to Osaka?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Osaka. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Osaka flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Osaka by month

Plan your trip to Osaka by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Osaka ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka when rainfall is around 1.6 in.

Temperature in Osaka by month

Plan your trip to Osaka by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated May 14, 2025.
Read through reviews of airlines operating flights from Seattle to Osaka, such as STARLUX Airlines, EVA Air and Korean Air. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
168 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,192 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,073 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Japan Airlines
8.3
Very good
1,471 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Entertainment

9.0

Comfort

9.0

Boarding

9.1

Food

8.9

Crew

9.3

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Osaka. 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 from for flights from Seattle to Osaka?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Osaka. On average, Seattle/Tacoma Intl has 0 outbound flights to Osaka per day from 11 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines flying from Seattle to Osaka round-trip?

    Philippine Airlines, at $743, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Air Canada and ANA. These flights start at 30% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Seattle to Osaka are Air Canada ($424), Asiana Airlines ($435), and Japan Airlines ($469).

  • What are the most popular routes from Seattle to Osaka?

    While some choose either Seattle/Tacoma Intl - Osaka Itami or Seattle/Tacoma Intl - Kobe, Seattle/Tacoma Intl - Osaka Kansai Intl is the most popular route from Seattle to Osaka.

  • Where are the most common layover locations when flying from Seattle to Osaka?

    Seattle to Osaka flights have a layover in Tokyo most of the time.

  • What are some popular things to do or see while on a layover in Tokyo?

    Akihabara Electric Town, Tsukiji Outer Market, and Ueno Koen are the most popular attractions in Tokyo if you're in need of something to do during your layover. Akihabara Electric Town, Tsukiji Outer Market, and Ueno Koen can be visited by traveling about 10.3 mi, 7.9 mi, and 11.5 mi respectively from Tokyo Haneda. Travelers can book a car rental at Tokyo Haneda for about $70 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Seattle to Osaka flights?

    The least popular layover on flights from Seattle to Osaka is Vancouver.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Seattle to Osaka?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Osaka (average of $892). Flying from Seattle to Osaka in December is currently the most expensive (average of $1,330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

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Nara
Nishinomiya

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Alternative routes for Seattle to Osaka

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

Top 10 airlines flying from Seattle to Osaka

Discover the top 10 airlines that operate flights from Seattle to Osaka. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$648Average$909FlexibilityNo cancel feeOn-time76%
ANACheapest$672Average$1,057FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$797Average$905FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$801Average$1,098FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$850Average$1,128FlexibilityNo cancel feeOn-time79%
STARLUX AirlinesCheapest$918Average$1,105FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$931Average$1,140FlexibilityNo cancel feeOn-time70%
Hawaiian AirlinesCheapest$997Average$1,479FlexibilityNo cancel feeOn-time85%

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