Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Washington to Osaka from $420

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 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
10:25 am - 7:35 pm
KIX
-
SEA
25h 10m
1 stop
$869Philippine Airlines
Wed, Oct 21 - Thu, Oct 29
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
$919Philippine Airlines
Fri, Aug 28 - Tue, Sep 8
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
$928Hainan Airlines
Sat, Jul 25 - Fri, Aug 7
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
$937Hainan Airlines
Sat, Aug 8 - Fri, Aug 21
Air Canada Logo
10:10 am - 4:25 pm
PDX
-
KIX
14h 15m
1 stop
Air Canada Logo
7:25 pm - 2:34 pm
KIX
-
PDX
35h 09m
2 stops
$948Air Canada
Wed, Sep 16 - Mon, Oct 26
Air Canada Logo
10:10 am - 4:25 pm
PDX
-
KIX
14h 15m
1 stop
Air Canada Logo
6:00 pm - 2:46 pm
KIX
-
PDX
12h 46m
1 stop
$951Air Canada
Sun, Sep 13 - Tue, Sep 29
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
6:30 pm - 10:20 am
KIX
-
SEA
31h 50m
1 stop
$954Cathay Pacific
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
10:10 am - 4:25 pm
PDX
-
KIX
14h 15m
1 stop
Multiple Airlines Logo
7:35 am - 2:51 pm
KIX
-
PDX
23h 16m
2 stops
$964Multiple Airlines
Mon, Sep 28 - Fri, Oct 9
Multiple Airlines Logo
5:30 am - 4:25 pm
PDX
-
KIX
18h 55m
2 stops
Multiple Airlines Logo
7:25 pm - 6:31 pm
KIX
-
PDX
15h 06m
1 stop
$966Multiple Airlines
Wed, Sep 16 - Mon, Oct 26
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
9:05 am - 10:20 am
KIX
-
SEA
17h 15m
1 stop
$968Cathay Pacific
Mon, Aug 31 - Thu, Sep 10

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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

Our best Philippine Airlines deals on State of Washington to Osaka Kansai Intl Airport flight tickets
Philippine Airlines
Oct 21
SEA11:10 pmSeattle/Tacoma Intl
23h 00m
1 stop
KIX2:10 pmOsaka Kansai Intl
Oct 29
KIX10:25 amOsaka Kansai Intl
25h 10m
1 stop
SEA7:35 pmSeattle/Tacoma Intl
$869
Philippine Airlines
Aug 28
SEA11:10 pmSeattle/Tacoma Intl
23h 00m
1 stop
KIX2:10 pmOsaka Kansai Intl
Sep 8
KIX3:15 pmOsaka Kansai Intl
20h 50m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$919

Cathay Pacific flights from State of Washington to Osaka Kansai Intl Airport

Our best Cathay Pacific deals on State of Washington to Osaka Kansai Intl Airport flight tickets
Cathay Pacific
Aug 31
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Sep 7
KIX6:30 pmOsaka Kansai Intl
31h 50m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$954
Cathay Pacific
Aug 31
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Sep 10
KIX9:05 amOsaka Kansai Intl
17h 15m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$968
Cathay Pacific
Oct 19
SEA11:45 amSeattle/Tacoma Intl
41h 30m
1 stop
KIX9:15 pmOsaka Kansai Intl
Oct 26
KIX4:15 pmOsaka Kansai Intl
33h 55m
2 stops
SEA10:10 amSeattle/Tacoma Intl
$969

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 June 29, 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

Wed 10/21

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Thu 10/29

10:25 am-7:35 pm

1 stop25h 10m

$869

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 8/28

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Tue 9/8

3:15 pm-8:05 pm

1 stop20h 50m

$919

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 7/25

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 8/7

2:20 pm-9:00 am

1 stop34h 40m

$928

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/8

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 8/21

2:20 pm-9:00 am

1 stop34h 40m

$937

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Wed 9/16

10:10 am-4:25 pm

1 stop14h 15m

Osaka Kansai Intl

Mon 10/26

7:25 pm-2:34 pm

2 stops35h 09m

$948
Quickest round-trip

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Sun 9/13

10:10 am-4:25 pm

1 stop14h 15m

Osaka Kansai Intl

Tue 9/29

6:00 pm-2:46 pm

1 stop12h 46m

$951

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/31

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Mon 9/7

6:30 pm-10:20 am

1 stop31h 50m

$954

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Mon 9/28

10:10 am-4:25 pm

1 stop14h 15m

Osaka Kansai Intl

Fri 10/9

7:35 am-2:51 pm

2 stops23h 16m

$964

PortlandOsaka

PDX - KIX

PDXKIX

Portland

Wed 9/16

5:30 am-4:25 pm

2 stops18h 55m

Osaka Kansai Intl

Mon 10/26

7:25 pm-6:31 pm

1 stop15h 06m

$966

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/31

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Thu 9/10

9:05 am-10:20 am

1 stop17h 15m

$968

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $828 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 $650 on momondo.

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

You could potentially save up to 53% 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

14h 15m

Direct flights

None
The fastest flight from State of Washington to Osaka Kansai Intl Airport takes 14h 15m
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.
Search flight deals

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
12,590 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
550 reviews
Search Asiana Airlines flights
ANAPriceFrom $648Free CancellationRating
8.3
1,258 reviews
Search ANA 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.

An easier way to manage your Osaka Kansai Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 7/29
Wed 8/5
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Osaka

Popular cities in Japan

Popular flights according to clicks in the last 7 days on momondo
Flights to Tokyo Haneda Airportfrom $662
Flights to Tokyo Narita Airportfrom $386
Flights to Osaka Itami Airportfrom $732
Flights to Nagoya Chubu Centrair Intl Airportfrom $555