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Cheap flights from St. Louis to Osaka from $460

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Osaka departing on 9/10. 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 St. Louis to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$914Air Canada
Tue, Sep 15 - Tue, Sep 22
Air Canada Logo
8:55 am - 4:25 pm
STL
-
KIX
17h 30m
1 stop
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$919Air Canada
Tue, Sep 15 - Tue, Sep 22
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
6:00 pm - 2:00 pm
KIX
-
STL
34h 00m
2 stops
$980Air Canada
Tue, Aug 18 - Mon, Sep 28
Air Canada Logo
8:55 am - 4:25 pm
STL
-
KIX
17h 30m
1 stop
Air Canada Logo
6:00 pm - 2:00 pm
KIX
-
STL
34h 00m
2 stops
$985Air Canada
Tue, Aug 18 - Tue, Sep 29
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$995Air Canada
Tue, Sep 15 - Tue, Sep 22
Air Canada Logo
2:40 pm - 4:25 pm
STL
-
KIX
35h 45m
1 stop
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$996Air Canada
Fri, Sep 18 - Tue, Sep 22
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$999Air Canada
Fri, Sep 18 - Tue, Sep 22
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
7:25 pm - 3:26 pm
KIX
-
STL
34h 01m
2 stops
$1,000Air Canada
Sun, Oct 11 - Thu, Oct 29
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
KIX
38h 15m
2 stops
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$1,015Air Canada
Tue, Sep 15 - Tue, Sep 22
Air Canada Logo
8:55 am - 4:25 pm
STL
-
KIX
17h 30m
1 stop
Air Canada Logo
6:00 pm - 6:41 pm
KIX
-
STL
38h 41m
2 stops
$1,020Air Canada
Tue, Sep 15 - Tue, Sep 22

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Cathay Pacific flights from St. Louis to Osaka Kansai Intl Airport

Our best Cathay Pacific deals on St. Louis to Osaka Kansai Intl Airport flight tickets
Cathay Pacific
Aug 18
STL5:11 pmLambert-St Louis
31h 39m
3 stops
KIX2:50 pmOsaka Kansai Intl
Sep 28
KIX9:45 amOsaka Kansai Intl
27h 58m
2 stops
STL11:43 pmLambert-St Louis
$1,219
Cathay Pacific
Aug 19
STL9:32 amLambert-St Louis
42h 33m
2 stops
KIX6:05 pmOsaka Kansai Intl
Oct 1
KIX6:30 pmOsaka Kansai Intl
43h 13m
2 stops
STL11:43 pmLambert-St Louis
$1,259
Cathay Pacific
Aug 17
STL6:00 amLambert-St Louis
34h 40m
2 stops
KIX6:40 amOsaka Kansai Intl
Oct 1
KIX4:15 pmOsaka Kansai Intl
45h 28m
3 stops
STL11:43 pmLambert-St Louis
$1,275

Air Canada flights from St. Louis to Osaka Kansai Intl Airport

Our best Air Canada deals on St. Louis to Osaka Kansai Intl Airport flight tickets
Air Canada
Sep 15
STL12:10 pmLambert-St Louis
38h 15m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 22
KIX6:00 pmOsaka Kansai Intl
38h 41m
2 stops
STL6:41 pmLambert-St Louis
$914
Air Canada
Sep 15
STL8:55 amLambert-St Louis
17h 30m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 22
KIX6:00 pmOsaka Kansai Intl
38h 41m
2 stops
STL6:41 pmLambert-St Louis
$919
Air Canada
Aug 18
STL12:10 pmLambert-St Louis
38h 15m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 28
KIX6:00 pmOsaka Kansai Intl
34h 00m
2 stops
STL2:00 pmLambert-St Louis
$980

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis 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 July 17, 2026.
Use the filters below to find and compare flights from St. Louis to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$914

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

8:55 am-4:25 pm

1 stop17h 30m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$919

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 8/18

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Mon 9/28

6:00 pm-2:00 pm

2 stops34h 00m

$980
Quickest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 8/18

8:55 am-4:25 pm

1 stop17h 30m

Osaka Kansai Intl

Tue 9/29

6:00 pm-2:00 pm

2 stops34h 00m

$985

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$995

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 9/18

2:40 pm-4:25 pm

1 stop35h 45m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$996

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 9/18

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$999

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 10/11

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Thu 10/29

7:25 pm-3:26 pm

2 stops34h 01m

$1,000

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$1,015

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

8:55 am-4:25 pm

1 stop17h 30m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$1,020

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 St. Louis 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

Can stopping save me money on St. Louis to Osaka Kansai Intl Airport flights?

You could potentially save up to 60% on your flight if you consider stops on a St. Louis to Osaka Kansai Intl Airport flight.

When to book flights from St. Louis to Osaka Kansai Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Osaka Kansai Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Osaka Kansai Intl Airport (STL to KIX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Osaka Kansai Intl Airport

Fastest flight time

17h 30m

Direct flights

None
The fastest flight from St. Louis to Osaka Kansai Intl Airport takes 17h 30m
There are no direct flights from St. Louis to Osaka Kansai Intl Airport. There are no popular flight routes from St. Louis to Osaka Kansai Intl Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Osaka Kansai Intl Airport

  • How far is Lambert-St Louis to Osaka Kansai Intl by plane?

    The straight-line distance from Lambert-St Louis to Osaka Kansai Intl is 6607.3 mi. A reasonable flight in good conditions will take 17h 30m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Osaka Kansai Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Osaka Kansai Intl Airport were last updated today.

  • How old do you have to be to fly from Lambert-St Louis Airport 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 Lambert-St Louis Airport to Osaka Kansai Intl Airport.

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

    The necessary travel and health documents for your Osaka Kansai Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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 St. Louis to Osaka?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Osaka. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Osaka with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Osaka flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Osaka?

momondo provides multiple filters to help you find the best flight to Osaka from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

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