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Kansai Intl

$308+ 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amSEA - KIX
1 stop16h 40mANA
Thu 12/187:05 amKIX - SEA
1 stop23h 15mANA
Deal found 10/28$627
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/273:40 pmSEA - KIX
1 stop23h 55mANA
Thu 12/43:45 pmKIX - SEA
1 stop14h 35mANA
Deal found 10/29$629
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:40 pmSEA - KIX
1 stop13h 40mANA
Sun 12/215:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/28$630
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:28 pmSEA - KIX
1 stop28h 12mANA
Sun 12/72:05 pmKIX - SEA
1 stop16h 15mANA
Deal found 10/29$631
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:40 pmSEA - KIX
1 stop30h 05mANA
Fri 12/129:10 pmKIX - SEA
1 stop33h 10mANA
Deal found 10/28$634
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmSEA - KIX
1 stop23h 55mANA
Fri 11/215:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/28$640
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/273:40 pmSEA - KIX
1 stop13h 40mANA
Fri 12/59:10 pmKIX - SEA
1 stop33h 10mANA
Deal found 10/29$642
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Sun 12/79:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 10/29$644
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Mon 12/810:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Deal found 10/29$646
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:00 amSEA - KIX
1 stop16h 40mANA
Sun 12/77:05 amKIX - SEA
1 stop23h 15mANA
Deal found 10/29$652
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/273:40 pmSEA - KIX
1 stop13h 40mANA
Wed 12/39:10 pmKIX - SEA
1 stop33h 10mANA
Deal found 10/29$654
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:30 amPDX - KIX
1 stop16h 10mANA
Wed 11/196:35 pmKIX - PDX
1 stop13h 11mANA
Deal found 10/28$697

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$620
(CrystalTravel)

One-way from

$308
(Air Canada)

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 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 ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 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 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 October 30, 2025.
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

Mon 11/17

7:00 am-4:40 pm

1 stop16h 40m

Osaka Kansai Intl

Wed 11/26

6:35 pm-12:59 am

1 stop23h 24m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 4/20

5:15 am-2:50 pm

1 stop17h 35m

Osaka Kansai Intl

Thu 4/30

8:30 am-2:25 pm

1 stop21h 55m

$682

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 11/27

12:41 pm-4:40 pm

2 stops34h 59m

Osaka Kansai Intl

Fri 12/5

6:35 pm-11:55 am

2 stops34h 20m

$683

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 1/27

10:30 am-6:45 pm

1 stop39h 15m

Osaka Kansai Intl

Thu 1/29

8:45 pm-9:05 pm

1 stop17h 20m

$688

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 11/18

7:10 am-8:45 pm

2 stops20h 35m

Osaka Kansai Intl

Thu 11/27

9:00 am-9:00 am

1 stop17h 00m

$689

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 11/26

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Wed 12/3

6:10 pm-9:00 am

1 stop31h 50m

$692

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 3/11

12:00 pm-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Tue 3/17

2:00 pm-10:00 am

1 stop36h 00m

$693

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 1/6

5:35 am-10:20 pm

2 stops23h 45m

Osaka Kansai Intl

Wed 2/4

6:35 pm-6:48 pm

1 stop17h 13m

$703

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 1/27

7:45 am-4:40 pm

1 stop15h 55m

Osaka Kansai Intl

Thu 1/29

8:20 am-12:39 am

2 stops33h 19m

$705

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 3/8

10:30 pm-2:05 pm

1 stop23h 35m

Osaka Kansai Intl

Thu 3/12

3:05 pm-7:40 pm

1 stop20h 35m

$720

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 39 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, February is the cheapest month in which you can book a flight from State of Washington to Osaka Kansai Intl Airport (average of $610). Flying from State of Washington to Osaka Kansai Intl Airport in January is currently the most expensive (average of $801). 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 KIX?

Find hourly flight availability from Washington to Kansai Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from State of Washington to Osaka Kansai Intl Airport in the evening. By choosing this option you can save up to 31% on the cost of your flight, compared to a flight in the morning.

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

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

Travelers seeking maximum savings on their State of Washington to Osaka Kansai Intl Airport flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from State of Washington to Osaka Kansai Intl Airport?

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 16h 40m. United Airlines provides one of the quickest options available for as low as $669. Airlines will cover a distance of 5024 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 Air Canada, with whom users have recently found tickets for as low as $308. However, be on the lookout for offers from ANA and Philippine Airlines, 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, February is the cheapest month in which you can book a flight from State of Washington to Osaka Kansai Intl Airport (average of $610). Flying from State of Washington to Osaka Kansai Intl Airport in January is currently the most expensive (average of $801). 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
Nishinomiya
Himeji

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Alternative routes for Washington to Kansai Intl

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Top 9 airlines flying from Washington to Kansai Intl

Discover the top 9 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$610Average$825FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$894FlexibilityNo cancel feeOn-timeN/A
ANACheapest$663Average$882FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
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$1,201FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$1,056Average$1,186FlexibilityNo cancel feeOn-time70%

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