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$397+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
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Cheap 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 April 29, 2026.

This Gotogate deal was found by Cheapflights users on 4/28. 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.
Sun 8/164:30 pm
SEA
-
UKB
1 stop13h 15m
ANA
Mon 9/219:15 pm
UKB
-
SEA
1 stop33h 10m
ANA
Deal found 4/28$814
This Gotogate deal was found by Cheapflights users on 4/26. 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.
Sun 11/13:40 pm
SEA
-
UKB
1 stop23h 20m
ANA
Tue 11/177:05 am
UKB
-
SEA
1 stop23h 15m
ANA
Deal found 4/26$824
This CrystalTravel deal was found by Cheapflights users on 4/26. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:32 pm
SEA
-
KIX
2 stops21h 03m
ANA
Fri 11/67:05 am
KIX
-
SEA
1 stop23h 15m
ANA
Deal found 4/26$830
This Booking.com deal was found by Cheapflights users on 4/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/184:30 pm
SEA
-
ITM
1 stop22h 55m
ANA
Thu 8/274:40 pm
ITM
-
SEA
1 stop13h 45m
ANA
Deal found 4/25$831
This Justfly.com deal was found by Cheapflights users on 4/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:06 am
SEA
-
ITM
2 stops19h 04m
ANA
Thu 9/1012:50 pm
ITM
-
SEA
1 stop17h 35m
ANA
Deal found 4/24$832
This Justfly.com deal was found by Cheapflights users on 4/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:30 pm
SEA
-
UKB
1 stop13h 15m
ANA
Tue 8/259:15 pm
UKB
-
SEA
1 stop33h 10m
ANA
Deal found 4/29$833
This Gotogate deal was found by Cheapflights users on 4/26. 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.
Sun 10/254:40 pm
SEA
-
UKB
1 stop23h 20m
ANA
Fri 11/67:05 am
UKB
-
SEA
1 stop23h 15m
ANA
Deal found 4/26$834
This Booking.com deal was found by Cheapflights users on 4/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/34:30 pm
SEA
-
KIX
1 stop24h 10m
ANA
Thu 8/279:00 pm
KIX
-
SEA
1 stop33h 25m
ANA
Deal found 4/25$834
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:31 pm
SEA
-
ITM
2 stops37h 09m
Japan Airlines
Tue 9/18:05 pm
ITM
-
SEA
2 stops36h 06m
Japan Airlines
Deal found 4/26$836
This Booking.com deal was found by Cheapflights users on 4/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:40 pm
SEA
-
UKB
1 stop23h 20m
ANA
Wed 11/257:05 am
UKB
-
SEA
1 stop23h 15m
ANA
Deal found 4/24$836
This Justfly.com deal was found by Cheapflights users on 4/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:00 am
SEA
-
KIX
1 stop15h 50m
ANA
Tue 8/254:55 pm
KIX
-
SEA
1 stop15h 20m
ANA
Deal found 4/26$836
This Booking.com deal was found by Cheapflights users on 4/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:40 pm
SEA
-
ITM
1 stop22h 50m
ANA
Mon 11/308:20 pm
ITM
-
SEA
1 stop34h 00m
ANA
Deal found 4/24$837

Find 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 April 29, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$831
(Booking.com)

One-way from

$397
(FlightHub)

Popular in

December

Cheapest in

January

Average price

$809
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka (OSA) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka (OSA) flights.
Search Deals
From Seattle/Tacoma Intl to Osaka (OSA)
Search Deals
One-way flight from Seattle/Tacoma Intl to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 29, 2026.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 7/22

7:00 am-5:05 pm

2 stops18h 05m

Osaka Itami

Mon 8/3

12:50 pm-11:10 pm

2 stops26h 20m

$1,031

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 7/20

6:30 am-7:50 pm

2 stops21h 20m

Osaka Kansai Intl

Fri 7/24

4:55 pm-2:38 pm

2 stops37h 43m

$1,048

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 7/22

4:30 pm-5:05 pm

1 stop32h 35m

Osaka Itami

Thu 8/6

12:50 pm-9:59 pm

2 stops25h 09m

$1,060
Quickest round-trip

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 7/20

7:00 am-5:05 pm

2 stops18h 05m

Osaka Itami

Wed 8/5

12:50 pm-4:20 pm

2 stops19h 30m

$1,065

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Wed 5/13

7:15 am-10:55 am

2 stops35h 40m

Kobe

Sat 5/23

11:55 am-10:40 am

1 stop14h 45m

$1,079

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 5/11

7:15 am-10:40 pm

2 stops23h 25m

Osaka Kansai Intl

Fri 5/22

2:15 am-10:40 am

1 stop24h 25m

$1,081

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 5/5

4:32 pm-2:50 pm

2 stops30h 18m

Osaka Kansai Intl

Thu 9/10

9:20 am-2:25 pm

1 stop21h 05m

$1,095

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 7/20

12:10 am-6:30 pm

1 stop26h 20m

Osaka Kansai Intl

Sat 8/8

7:45 pm-3:45 pm

1 stop36h 00m

$1,114

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/21

12:10 am-9:35 pm

1 stop29h 25m

Osaka Kansai Intl

Sat 8/8

7:45 pm-3:45 pm

1 stop36h 00m

$1,114

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Mon 6/1

10:45 am-7:50 am

2 stops29h 05m

Kobe

Tue 6/16

7:05 am-2:25 pm

1 stop23h 20m

$1,219

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 55 resultsSorted by cheapest first
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice 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 Seattle-Osaka flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Osaka flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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?

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 78 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, March is the cheapest month in which you can book a flight from Seattle to Osaka (average of $363). Flying from Seattle to Osaka in June is currently the most expensive (average of $718). 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.

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

What’s the top layover airport for flights from Seattle to Osaka?

Share of 1-stop round-trip flights from Seattle to Osaka chosen by Cheapflights users in the past 12 months, using the same layover each way.

Honolulu (HNL) – chosen by Cheapflights users on 50% of 1-stop itineraries from Seattle to Osaka on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Osaka?

Average round-trip fare for 1-stop flights from Seattle to Osaka, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Honolulu (HNL) is the most affordable 1-stop option, with an average round-trip price of $548.

What’s the fastest layover option from Seattle to Osaka?

Shortest average travel time for 1-stop one-way flights from Seattle to Osaka, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Tokyo (HND) have the shortest average one-way travel time for 1-stop routes: 13h 35m.

Which airport typically offers the quickest layover for flights from Seattle to Osaka?

Average layover duration for 1-stop one-way flights from Seattle to Osaka, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Tokyo (HND) offer the fastest connection on this route, with an average layover time of 2h 19m.

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 April 29, 2026.
Get a feel of what it's like to fly with ANA,Korean Air, andJapan Airlines from Seattle to Osaka by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
ANA
8.4
Very good
1,200 reviews
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Korean Air
8.4
Very good
1,214 reviews
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Japan Airlines
8.3
Very good
1,797 reviews
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Asiana Airlines
8.1
Very good
524 reviews
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.
Air Canada
7.1
Good
10,979 reviews
ANA
8.4
Very good
1,200 reviews

Entertainment

8.0

Overall

8.4

Food

7.7

Crew

8.7

Boarding

8.5

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

EWR - NRT

Flights were on time and flew ahead of schedule. Seating was comfortable. Meal quality left a little to be desired, and service was mostly mechanical.

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 5 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to Osaka?

    A quick flight from Seattle to Osaka can take about 18h 05m. United Airlines provides one of the quickest options available for as low as $1,031. Airlines will cover a distance of 4999 mi. This flight may include one or multiple stops.

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

    Alaska Airlines, at $370, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Asiana Airlines and ANA. These flights start at 57% 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 Asiana Airlines ($304), Korean Air ($355), and Air Canada ($360).

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

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

  • 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, March is the cheapest month in which you can book a flight from Seattle to Osaka (average of $363). Flying from Seattle to Osaka in June is currently the most expensive (average of $718). 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 Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara

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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.
Portland to Kansai Intl flights

Top 5 airlines flying from Seattle to Osaka

Discover the top 5 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 April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$370Average$438FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$565Average$734FlexibilityNo cancel feeOn-time76%
ANACheapest$650Average$833FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$819FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$697Average$1,036FlexibilityNo cancel feeOn-time79%

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