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Kansai Intl

$307+ Cheap flights from Washington to Kansai Intl (KIX)

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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
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Cheap flight deals from Washington to Kansai Intl

Cheapest flights from Washington to Kansai Intl
Explore the most affordable flight options available from Washington to Kansai Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 11, 2026.

This CrystalTravel deal was found by Cheapflights users on 2/9. 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 4/2612:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Thu 5/710:40 am
KIX
-
SEA
1 stop20h 15m
Asiana Airlines
Deal found 2/9$612
This CrystalTravel deal was found by Cheapflights users on 2/10. 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 4/1212:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Mon 4/279:30 am
KIX
-
SEA
1 stop21h 25m
Asiana Airlines
Deal found 2/10$614
This oojo deal was found by Cheapflights users on 2/11. 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 9/2912:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Thu 10/89:30 am
KIX
-
SEA
1 stop21h 25m
Asiana Airlines
Deal found 2/11$615
This oojo deal was found by Cheapflights users on 2/9. 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.
Sun 3/812:10 am
SEA
-
KIX
1 stop16h 40m
Asiana Airlines
Wed 3/1810:30 am
KIX
-
SEA
1 stop20h 25m
Asiana Airlines
Deal found 2/9$616
This oojo deal was found by Cheapflights users on 2/11. 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 4/2112:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Sun 5/1010:40 am
KIX
-
SEA
1 stop20h 15m
Asiana Airlines
Deal found 2/11$618
This oojo deal was found by Cheapflights users on 2/9. 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 9/1012:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Sun 9/207:45 pm
KIX
-
SEA
1 stop35h 10m
Asiana Airlines
Deal found 2/9$621
This FlightHub deal was found by Cheapflights users on 2/8. 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 4/2012:55 am
SEA
-
KIX
1 stop28h 40m
Asiana Airlines
Mon 5/1110:40 am
KIX
-
SEA
1 stop20h 15m
Asiana Airlines
Deal found 2/8$629
This FlightHub deal was found by Cheapflights users on 2/8. 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.
Sun 7/1912:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Fri 8/79:30 am
KIX
-
SEA
1 stop21h 55m
Asiana Airlines
Deal found 2/8$632
This FlightHub deal was found by Cheapflights users on 2/8. 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.
Fri 7/1712:55 am
SEA
-
KIX
1 stop28h 40m
Asiana Airlines
Fri 8/710:40 am
KIX
-
SEA
1 stop20h 45m
Asiana Airlines
Deal found 2/8$635
This CrystalTravel deal was found by Cheapflights users on 2/10. 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.
Thu 11/1912:10 am
SEA
-
KIX
1 stop26h 15m
Asiana Airlines
Mon 11/3011:10 am
KIX
-
SEA
1 stop19h 45m
Asiana Airlines
Deal found 2/10$636
This FlightHub deal was found by Cheapflights users on 2/8. 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.
Fri 7/1712:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Sun 8/97:45 pm
KIX
-
SEA
1 stop35h 40m
Asiana Airlines
Deal found 2/8$638
This FlightHub deal was found by Cheapflights users on 2/9. 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.
Fri 2/205:35 am
PDX
-
KIX
1 stop18h 05m
ANA
Fri 2/276:35 pm
KIX
-
PDX
1 stop17h 20m
ANA
Deal found 2/9$663

Find flight deals from Washington to Kansai Intl

Keep the following information in mind while searching for Washington to Kansai Intl flight deals. Data was last updated February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$612
(CrystalTravel)

One-way from

$307
(CrystalTravel)

Popular in

December

Cheapest in

January

Average price

$679
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 Kansai Intl
Search Deals
One-way flight from Washington to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Kansai Intl 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 February 11, 2026.
Use the filters below to find and compare flights from Washington to Osaka Kansai Intl Airport that are best for you.

Fly from

Washington

Fly to

Kansai Intl

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/21

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Tue 8/11

9:30 am-3:25 pm

1 stop21h 55m

$666

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/21

12:55 am-9:35 pm

1 stop28h 40m

Osaka Kansai Intl

Mon 8/10

7:45 pm-3:25 pm

1 stop35h 40m

$666

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 2/23

5:05 am-4:40 pm

1 stop18h 35m

Osaka Kansai Intl

Mon 3/2

6:35 pm-9:01 pm

1 stop19h 26m

$667

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 4/6

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Mon 4/20

9:30 am-2:55 pm

1 stop21h 25m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 4/23

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Fri 5/8

10:40 am-2:55 pm

1 stop20h 15m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 2/22

8:30 am-4:40 pm

2 stops39h 10m

Osaka Kansai Intl

Mon 3/2

6:35 pm-10:13 pm

2 stops20h 38m

$671

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Mon 4/27

7:15 am-4:40 pm

2 stops17h 25m

Osaka Kansai Intl

Thu 5/7

7:00 am-3:03 pm

2 stops24h 03m

$680

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 4/21

7:15 am-5:55 pm

2 stops18h 40m

Osaka Kansai Intl

Wed 5/13

4:55 pm-6:46 pm

1 stop17h 51m

$684

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 3/9

7:25 am-8:45 pm

2 stops21h 20m

Osaka Kansai Intl

Wed 4/1

9:05 am-2:41 pm

2 stops21h 36m

$697

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/26

7:12 am-2:50 pm

1 stop15h 38m

Osaka Kansai Intl

Wed 5/6

4:55 pm-1:12 am

1 stop24h 17m

$714

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 42 results
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Best time to book a flight from Washington to Kansai Intl

Have a flexible travel schedule? Discover the best time to fly to Kansai Intl 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 Kansai Intl Airport

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Osaka Kansai Intl Airport (average of $370). Flying from State of Washington to Osaka Kansai Intl Airport in June is currently the most expensive (average of $979). 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.

Related info for your journey

Find useful and relevant information for your journey from Washington to Kansai Intl. 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 Kansai Intl Airport?

    A quick flight from State of Washington to Osaka Kansai Intl Airport can take about 17h 25m. Asiana Airlines provides one of the quickest options available for as low as $680. Airlines will cover a distance of 5082 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Asiana Airlines, with whom users have recently found tickets for as low as $304. However, be on the lookout for offers from Korean Air and ANA, as they are both options that can get you from State of Washington to Osaka Kansai Intl Airport for a low price.

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

    The most popular flight routes from State of Washington to Osaka Kansai Intl Airport are Seattle/Tacoma Intl - Osaka Kansai Intl, Portland - Osaka Kansai Intl and Pasco Tri Cities - Osaka Kansai Intl.

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

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

  • How can I find direct flights from Washington to Kansai Intl?

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

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

    Yes. Cheapflights offers flight deals from Washington to Kansai Intl 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 Kansai Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Osaka Kansai Intl Airport (average of $370). Flying from State of Washington to Osaka Kansai Intl Airport in June is currently the most expensive (average of $979). 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 Kansai Intl Airport?

Book flights to Osaka Kansai Intl Airport if you plan to visit one of these locations
Nara
Izumisano
Himeji

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Alternative routes for Washington to Kansai Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Washington to Kansai Intl

Discover the top 7 airlines that operate flights from Washington to Kansai Intl. 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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$370Average$438FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$592Average$760FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$647Average$982FlexibilityNo cancel feeOn-time69%
ANACheapest$648Average$795FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$660Average$803FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$669Average$801FlexibilityNo cancel feeOn-time67%
STARLUX AirlinesCheapest$934Average$1,381FlexibilityNo cancel feeOn-timeN/A

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