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Osaka

$335+ Cheap flights from Washington 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Nov 12 — Nov 191
Wed 11/12
Wed 11/19
1 adult, Economy
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Find flight deals from Washington to Osaka

Cheapest flights from Washington to Osaka
Explore the most affordable flight options available from Washington to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 13, 2025.

This CrystalTravel deal was found by Cheapflights users on 10/12. 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 11/212:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Thu 11/1310:50 amKIX - SEA
1 stop20h 05mAsiana Airlines
Deal found 10/12$561
This oojo deal was found by Cheapflights users on 10/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:10 amSEA - KIX
1 stop24h 55mAsiana Airlines
Tue 11/1810:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Deal found 10/13$564
This Gotogate deal was found by Cheapflights users on 10/12. 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.
Mon 10/2712:10 amSEA - KIX
1 stop25h 55mAsiana Airlines
Wed 11/127:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/12$582
This Trip.com deal was found by Cheapflights users on 10/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/202:15 pmSEA - KIX
1 stop35h 35mAsiana Airlines
Wed 11/57:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/12$607
This Asiana Airlines deal was found by Cheapflights users on 10/12. 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.
Sun 11/3012:10 amSEA - KIX
1 stop24h 55mAsiana Airlines
Fri 12/127:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/12$613
This CrystalTravel deal was found by Cheapflights users on 10/11. 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.
Wed 12/37:00 amSEA - KIX
1 stop16h 40mANA
Wed 12/105:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/11$638
This CrystalTravel deal was found by Cheapflights users on 10/11. 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 12/73:40 pmSEA - KIX
1 stop13h 40mANA
Thu 12/185:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/11$640
This oojo deal was found by Cheapflights users on 10/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Fri 12/127:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/13$656
This oojo deal was found by Cheapflights users on 10/11. 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 11/2511:00 amSEA - UKB
1 stop37h 40mKorean Air
Tue 12/26:40 pmUKB - SEA
1 stop31h 20mKorean Air
Deal found 10/11$658
This CrystalTravel deal was found by Cheapflights users on 10/11. 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.
Wed 12/36:05 amSEA - KIX
1 stop19h 45mJapan Airlines
Wed 12/103:00 pmKIX - SEA
2 stops16h 38mJapan Airlines
Deal found 10/11$658
This oojo deal was found by Cheapflights users on 10/11. 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 11/2511:00 amSEA - KIX
1 stop30h 45mKorean Air
Tue 12/26:10 pmKIX - SEA
1 stop31h 50mKorean Air
Deal found 10/11$660
This FlightHub deal was found by Cheapflights users on 10/13. 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 12/293:40 pmSEA - ITM
1 stop22h 50mANA
Tue 1/134:50 pmITM - SEA
1 stop13h 30mANA
Deal found 10/13$662

Cheap flight deals from Washington to Osaka

Keep the following information in mind while searching for Washington to Osaka flight deals. Data was last updated October 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$561
(CrystalTravel)

One-way from

$336
(CrystalTravel)

Popular in

December

Cheapest in

September

Average price

$819
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 Washington to Osaka (OSA)
Search Deals
One-way flight from Washington to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 October 13, 2025.
Use the filters below to find and compare flights from Washington to Osaka that are best for you.

Fly from

Washington

Fly to

Osaka

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 12/1

12:10 am-6:05 pm

1 stop24h 55m

Osaka Kansai Intl

Fri 12/12

7:25 pm-1:55 pm

1 stop35h 30m

$613

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 10/23

2:15 pm-5:50 pm

1 stop35h 35m

Osaka Kansai Intl

Thu 11/6

10:50 am-1:55 pm

1 stop20h 05m

$613

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 11/25

11:00 am-5:40 pm

1 stop37h 40m

Kobe

Tue 12/2

6:40 pm-9:00 am

1 stop31h 20m

$658

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 12/29

3:40 pm-6:10 pm

1 stop33h 30m

Osaka Itami

Wed 1/14

1:00 pm-1:20 pm

1 stop17h 20m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 12/29

3:40 pm-7:25 pm

1 stop34h 45m

Osaka Kansai Intl

Tue 1/13

8:20 am-1:20 pm

1 stop22h 00m

$672

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 11/11

3:40 pm-8:00 am

1 stop23h 20m

Kobe

Tue 11/18

9:15 pm-1:20 pm

1 stop33h 05m

$674

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 12/29

3:40 pm-6:10 pm

1 stop33h 30m

Osaka Itami

Tue 1/13

1:00 pm-9:12 pm

3 stops25h 12m

$679

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 12/2

7:00 am-4:40 pm

1 stop16h 40m

Osaka Kansai Intl

Tue 12/9

8:20 am-1:20 pm

1 stop22h 00m

$682

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Mon 12/29

3:40 pm-8:00 am

1 stop23h 20m

Kobe

Mon 1/12

9:15 pm-1:20 pm

1 stop33h 05m

$684

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 12/29

3:40 pm-6:10 pm

1 stop33h 30m

Osaka Itami

Thu 1/15

1:00 pm-12:59 am

2 stops28h 59m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Osaka

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

What is the cheapest month to book a flight from State of Washington to Osaka?

Currently, February is the cheapest month in which you can book a flight from State of Washington to Osaka (average of $610). Flying from State of Washington to Osaka in January is currently the most expensive (average of $781). 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 WA to OSA?

Find hourly flight availability from Washington 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 October 13, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Osaka in the evening. If you’re flexible enough to do this you can expect to save up to 42% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from State of Washington to Osaka?

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

Travelers seeking maximum savings on their State of Washington to Osaka flight should consider departing on Thursday at noon 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.

Related info for your journey

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

  • How long is the flight from State of Washington to Osaka?

    Airlines like Asiana Airlines, Korean Air, and United Airlines fly from State of Washington to Osaka in about 24h 55m. The time it takes to get you to your destination can typically vary by up to 12h 45m. The distance between State of Washington and Osaka is about 5024 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Osaka one-way?

    $335 is the cheapest one-way deal found within the past few days, from Philippine Airlines. You may also be able to find cheap deals on ANA and Alaska Airlines, with prices starting from $346 and $351, respectively.

  • What are the most popular routes from State of Washington to Osaka?

    Most travelers choose Seattle/Tacoma Intl - Osaka Kansai Intl, Seattle/Tacoma Intl - Osaka Itami or Seattle/Tacoma Intl - Kobe when deciding on the best route from State of Washington to Osaka.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Osaka?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Osaka (average of $610). Flying from State of Washington to Osaka in January is currently the most expensive (average of $781). 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
Nishinomiya

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Top 10 airlines flying from Washington to Osaka

Discover the top 10 airlines that operate flights from Washington 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 October 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$610Average$833FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$894FlexibilityNo cancel feeOn-timeN/A
ANACheapest$666Average$927FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$697Average$1,128FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$734Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$975Average$1,187FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$1,033Average$1,218FlexibilityNo cancel feeOn-time74%

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