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Cheap flights from Washington to Osaka from $435

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Osaka departing on 9/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:05 pm - 8:45 pm
SEA
-
KIX
15h 40m
1 stop
Delta Logo
12:35 pm - 1:37 pm
KIX
-
SEA
17h 02m
1 stop
$874Delta
Sun, Aug 30 - Tue, Sep 8
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$875Asiana Airlines
Tue, Sep 1 - Tue, Sep 8
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$876Asiana Airlines
Mon, Aug 31 - Fri, Sep 11
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$879Hainan Airlines
Sat, Sep 5 - Fri, Sep 11
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
3:15 pm - 8:05 pm
KIX
-
SEA
20h 50m
1 stop
$892Philippine Airlines
Tue, Sep 1 - Wed, Sep 9
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
10:25 am - 8:05 pm
KIX
-
SEA
25h 40m
1 stop
$893Philippine Airlines
Wed, Sep 9 - Wed, Sep 23
ANA Logo
7:00 am - 2:50 pm
PDX
-
KIX
15h 50m
1 stop
ANA Logo
4:55 pm - 2:47 pm
KIX
-
PDX
13h 52m
1 stop
$933ANA
Wed, Aug 19 - Fri, Aug 28
United Airlines Logo
7:00 am - 7:50 pm
PDX
-
KIX
20h 50m
2 stops
United Airlines Logo
9:20 am - 2:47 pm
KIX
-
PDX
21h 27m
2 stops
$948United Airlines
Wed, Aug 19 - Fri, Aug 28
ANA Logo
7:00 am - 2:50 pm
PDX
-
KIX
15h 50m
1 stop
ANA Logo
4:55 pm - 2:47 pm
KIX
-
PDX
13h 52m
1 stop
$953ANA
Tue, Sep 1 - Wed, Sep 16
United Airlines Logo
7:00 am - 2:50 pm
PDX
-
KIX
15h 50m
1 stop
United Airlines Logo
9:20 am - 12:47 am
KIX
-
PDX
31h 27m
2 stops
$962United Airlines
Tue, Sep 1 - Wed, Sep 16

Delta flights from State of Washington to Osaka Kansai Intl Airport

Our best Delta deals on State of Washington to Osaka Kansai Intl Airport flight tickets
Delta
Aug 30
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 8
KIX12:35 pmOsaka Kansai Intl
17h 02m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$874
Delta
Aug 31
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 5
KIX2:15 amOsaka Kansai Intl
27h 22m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$898
Delta
Aug 30
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 7
KIX12:35 pmOsaka Kansai Intl
17h 02m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$929

Hainan Airlines flights from State of Washington to Osaka Kansai Intl Airport

Our best Hainan Airlines deals on State of Washington to Osaka Kansai Intl Airport flight tickets
Hainan Airlines
Sep 5
SEA11:00 amSeattle/Tacoma Intl
33h 45m
1 stop
KIX12:45 pmOsaka Kansai Intl
Sep 11
KIX2:20 pmOsaka Kansai Intl
34h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$879
Hainan Airlines
Nov 7
SEA10:00 amSeattle/Tacoma Intl
33h 35m
1 stop
KIX12:35 pmOsaka Kansai Intl
Nov 16
KIX2:35 pmOsaka Kansai Intl
34h 25m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$915
Hainan Airlines
Nov 7
SEA10:00 amSeattle/Tacoma Intl
33h 35m
1 stop
KIX12:35 pmOsaka Kansai Intl
Nov 20
KIX2:35 pmOsaka Kansai Intl
34h 25m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$916

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Osaka Kansai Intl Airport 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, momondo users made 832,500 searches. Data last updated May 12, 2026.
Use the filters below to find and compare flights from Washington to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

1:05 pm-8:45 pm

1 stop15h 40m

Osaka Kansai Intl

Tue 9/8

12:35 pm-1:37 pm

1 stop17h 02m

$874

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Tue 9/8

10:30 am-3:15 pm

1 stop20h 45m

$875

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/31

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Fri 9/11

10:30 am-3:15 pm

1 stop20h 45m

$876

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/5

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 9/11

2:20 pm-9:00 am

1 stop34h 40m

$879

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/9

3:15 pm-8:05 pm

1 stop20h 50m

$892

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/23

10:25 am-8:05 pm

1 stop25h 40m

$893
Quickest round-trip

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Wed 8/19

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Fri 8/28

4:55 pm-2:47 pm

1 stop13h 52m

$933

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Wed 8/19

7:00 am-7:50 pm

2 stops20h 50m

Osaka Kansai Intl

Fri 8/28

9:20 am-2:47 pm

2 stops21h 27m

$948

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 9/1

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Wed 9/16

4:55 pm-2:47 pm

1 stop13h 52m

$953

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Tue 9/1

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Wed 9/16

9:20 am-12:47 am

2 stops31h 27m

$962

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Osaka from

How to get the cheapest flight ticket from State of Washington to Osaka Kansai Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Osaka Kansai Intl Airport?

In general, January is the cheapest month to fly from State of Washington to Osaka Kansai Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $370. If you aren’t able to travel during the month of January, then book flights to Osaka Kansai Intl Airport from State of Washington during December instead. Flights to Osaka Kansai Intl Airport in December, while not as cheap as those in January, still average around $382.

How far in advance should I book a flight from Washington to Osaka Kansai Intl Airport?

You are more likely to see cheaper flights to Osaka Kansai Intl Airport from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka Kansai Intl Airport for around $845 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka Kansai Intl Airport from State of Washington for as low as $715 on momondo.

Can stopping save me money on State of Washington to Osaka Kansai Intl Airport flights?

You could potentially save up to 55% on your flight if you consider stops on a State of Washington to Osaka Kansai Intl Airport flight.

Cheap State of Washington to Osaka Kansai Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Osaka Kansai Intl Airport

Fastest flight time

13h 20m

Direct flights

None
The fastest flight from State of Washington to Osaka Kansai Intl Airport takes 13h 20m
There are no direct flights from State of Washington to Osaka Kansai Intl Airport. There are no popular flight routes from State of Washington to Osaka Kansai Intl Airport.
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Frequently asked questions about flying from Washington to Osaka Kansai Intl Airport

  • When did momondo last update prices for flights from Washington to Osaka Kansai Intl Airport?

    Prices for flights from Washington to Osaka Kansai Intl Airport were last updated today.

  • How many operators does momondo search for flights from Washington to Osaka Kansai Intl Airport?

  • How old do you have to be to fly from Washington to Osaka Kansai Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Osaka Kansai Intl Airport.

  • What documentation or ID do you need to fly to Osaka Kansai Intl Airport?

    The required travel and health documents for your Osaka Kansai Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Osaka Kansai Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from State of Washington to Osaka Kansai Intl Airport

Compare and see reviews for airlines that fly from State of Washington to Osaka Kansai Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $370Free CancellationRating
7.9
12,354 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
532 reviews
Search Asiana Airlines flights
ANAPriceFrom $650Free CancellationRating
8.3
1,208 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
11,026 reviews
Search Air Canada flights

Traveling to a place near Osaka?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Osaka?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Osaka for you.

Can I find flights from Washington to Osaka with flexible booking policies on momondo?

Yes. All flights to Osaka from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Osaka?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Osaka.

I’m not ready to book a flight from Washington to Osaka right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Osaka, momondo offers a useful price alert feature which will track prices for flights to Osaka from Washington and alert you when they change.

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