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$348+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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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 julio 31, 2025.

Round-trip from

$635
(Delta)

One-way from

$348
(Air Canada)

Popular in

December

Cheapest in

October

Average price

$962
From Washington to Osaka (OSA)
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One-way flight from Washington to Osaka (OSA)
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Highest demand for flights based on searches. 6% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 julio 31, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. 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.
mar. 10/77:00 amSEA - KIX
1 stop15h 50mUnited Airlines
mar. 10/148:30 amKIX - SEA
1 stop21h 55mUnited Airlines
Deal found 7/31$642
This Booking.com deal was found by Cheapflights users on 7/31. 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.
mar. 10/284:40 pmSEA - KIX
1 stop13h 40mANA
vie. 11/73:40 pmKIX - SEA
1 stop14h 40mANA
Deal found 7/31$645
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/97:40 pmPDX - KIX
1 stop28h 45mAir Canada
mar. 9/166:05 pmKIX - PDX
1 stop20h 56mAir Canada
Deal found 7/29$655
This Trip.com deal was found by Cheapflights users on 7/31. 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.
mar. 10/74:30 pmSEA - ITM
1 stop22h 55mANA
mar. 10/146:00 pmITM - SEA
1 stop12h 25mANA
Deal found 7/31$655
This United Airlines deal was found by Cheapflights users on 7/31. 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.
mar. 10/76:35 amSEA - ITM
2 stops42h 30mUnited Airlines
mar. 10/1412:00 pmITM - SEA
2 stops25h 15mUnited Airlines
Deal found 7/31$656
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1211:00 amSEA - KIX
1 stop30h 45mDelta
vie. 11/2811:55 amKIX - SEA
2 stops24h 02mDelta
Deal found 7/31$660
This Booking.com deal was found by Cheapflights users on 7/31. 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.
dom. 9/144:30 pmSEA - UKB
1 stop13h 15mANA
dom. 9/217:05 amUKB - SEA
1 stop23h 20mANA
Deal found 7/31$663
This oojo deal was found by Cheapflights users on 7/30. 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.
lun. 9/152:15 pmSEA - KIX
1 stop35h 35mAsiana Airlines
lun. 9/295:00 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 7/30$686
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/35:30 amPDX - KIX
2 stops23h 30mDelta
mar. 9/1612:35 pmKIX - PDX
2 stops22h 16mDelta
Deal found 7/31$695
This oojo deal was found by Cheapflights users on 7/31. 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.
mié. 9/33:59 pmSEA - UKB
2 stops33h 41mKorean Air
mar. 9/96:40 pmUKB - SEA
1 stop32h 00mKorean Air
Deal found 7/31$697
This oojo deal was found by Cheapflights users on 7/31. 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.
mié. 9/312:50 pmSEA - KIX
1 stop16h 10mKorean Air
mar. 9/99:05 amKIX - SEA
1 stop17h 35mKorean Air
Deal found 7/31$701
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/316:15 amPDX - KIX
1 stop18h 10mMultiple Airlines
sáb. 9/136:05 pmKIX - PDX
2 stops18h 56mMultiple Airlines
Deal found 7/29$702

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 julio 31, 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

mar. 10/7

5:00 am-2:50 pm

1 stop17h 50m

Osaka Kansai Intl

mar. 10/14

8:30 am-2:25 pm

1 stop21h 55m

$642

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

mar. 10/28

4:40 pm-10:20 pm

1 stop13h 40m

Osaka Kansai Intl

vie. 11/7

3:40 pm-1:20 pm

1 stop14h 40m

$645

PortlandOsaka

PDX - KIX

PDXKIX

Portland

mar. 9/9

7:40 pm-4:25 pm

1 stop28h 45m

Osaka Kansai Intl

mar. 9/16

6:05 pm-11:01 pm

1 stop20h 56m

$655

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

mar. 10/7

4:30 pm-7:25 am

1 stop22h 55m

Osaka Itami

mar. 10/14

6:00 pm-2:25 pm

1 stop12h 25m

$655

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

mar. 10/7

6:35 am-5:05 pm

2 stops42h 30m

Osaka Itami

mar. 10/14

12:00 pm-9:15 pm

2 stops25h 15m

$656

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

dom. 9/14

4:30 pm-9:45 pm

1 stop13h 15m

Kobe

dom. 9/21

7:05 am-2:25 pm

1 stop23h 20m

$663

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

dom. 9/14

7:20 am-11:20 am

2 stops36h 00m

Osaka Kansai Intl

dom. 9/21

9:05 am-10:40 am

1 stop17h 35m

$675

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

lun. 9/15

2:15 pm-5:50 pm

1 stop35h 35m

Osaka Kansai Intl

lun. 9/29

5:00 pm-12:30 pm

1 stop35h 30m

$686

PortlandOsaka

PDX - KIX

PDXKIX

Portland

mié. 9/3

5:30 am-9:00 pm

2 stops23h 30m

Osaka Kansai Intl

mar. 9/16

12:35 pm-6:51 pm

2 stops22h 16m

$695

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

mié. 9/3

3:59 pm-5:40 pm

2 stops33h 41m

Kobe

mar. 9/9

6:40 pm-10:40 am

1 stop32h 00m

$697

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 $877). Flying from State of Washington to Osaka in June is currently the most expensive (average of $1,312). 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 julio 31, 2025.

When flying from State of Washington to Osaka, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 julio 31, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air, and ANA from Washington to Osaka. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
199 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,220 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
ANA
8.4
Very good
922 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,121 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,536 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Overall

9.0

Comfort

8.9

Crew

9.3

Boarding

9.0

Food

8.8

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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.

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

    $348 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Alaska Airlines and Asiana Airlines, with prices starting from $349 and $353, 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 $877). Flying from State of Washington to Osaka in June is currently the most expensive (average of $1,312). 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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Alternative routes for Washington to Osaka

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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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$648Average$891FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$669Average$963FlexibilityNo cancel feeOn-time67%
ANACheapest$672Average$1,132FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$697Average$1,089FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$797Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$918Average$1,105FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$963Average$1,159FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$999Average$1,186FlexibilityNo cancel feeOn-time70%

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