Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from St. Louis to Osaka from $438

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 2/15. 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
0 bags

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

Find the cheapest flights from St. Louis to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:30 pm - 4:40 pm
STL
-
KIX
33h 10m
2 stops
United Airlines Logo
6:35 pm - 9:23 am
KIX
-
STL
29h 48m
2 stops
$793United Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
4:30 pm - 4:40 pm
STL
-
KIX
33h 10m
2 stops
United Airlines Logo
6:35 pm - 4:44 pm
KIX
-
STL
37h 09m
1 stop
$802United Airlines
Tue, Feb 24 - Tue, Mar 3
Japan Airlines Logo
2:19 pm - 8:25 am
STL
-
KIX
27h 06m
2 stops
Japan Airlines Logo
7:00 am - 1:50 pm
KIX
-
STL
21h 50m
2 stops
$856Japan Airlines
Sun, Feb 15 - Sat, Feb 28
Japan Airlines Logo
2:19 pm - 8:25 am
STL
-
KIX
27h 06m
2 stops
Japan Airlines Logo
5:50 pm - 11:59 pm
KIX
-
STL
21h 09m
1 stop
$860Japan Airlines
Sun, Feb 15 - Sat, Feb 28
United Airlines Logo
6:00 pm - 4:40 pm
STL
-
KIX
31h 40m
2 stops
United Airlines Logo
6:35 pm - 8:26 pm
KIX
-
STL
40h 51m
2 stops
$871United Airlines
Thu, Feb 19 - Mon, Feb 23
Air Canada Logo
8:21 am - 4:25 pm
STL
-
KIX
42h 04m
2 stops
Air Canada Logo
6:00 pm - 10:56 pm
KIX
-
STL
42h 56m
2 stops
$876Air Canada
Sun, Apr 5 - Thu, Apr 23
Air Canada Logo
7:45 am - 4:25 pm
STL
-
KIX
42h 40m
2 stops
Air Canada Logo
6:00 pm - 9:08 pm
KIX
-
STL
41h 08m
2 stops
$882Air Canada
Tue, Apr 7 - Thu, Apr 23
United Airlines Logo
6:51 am - 4:40 pm
STL
-
KIX
19h 49m
1 stop
United Airlines Logo
8:20 am - 11:51 pm
KIX
-
STL
29h 31m
2 stops
$889United Airlines
Mon, Mar 9 - Wed, Mar 25
Air Canada Logo
1:00 pm - 4:25 pm
STL
-
KIX
37h 25m
2 stops
Air Canada Logo
6:00 pm - 3:46 pm
KIX
-
STL
35h 46m
2 stops
$891Air Canada
Wed, Jun 3 - Fri, Jun 12
United Airlines Logo
5:15 am - 4:40 pm
STL
-
KIX
21h 25m
2 stops
United Airlines Logo
6:35 pm - 9:21 am
KIX
-
STL
28h 46m
2 stops
$892United Airlines
Mon, Mar 9 - Wed, Mar 25

United Airlines flights from St. Louis to Osaka Kansai Intl Airport

Our best United Airlines deals on St. Louis to Osaka Kansai Intl Airport flight tickets
United Airlines
Feb 24
STL4:30 pmLambert-St Louis
33h 10m
2 stops
KIX4:40 pmOsaka Kansai Intl
Mar 3
KIX6:35 pmOsaka Kansai Intl
29h 48m
2 stops
STL9:23 amLambert-St Louis
$793
United Airlines
Feb 24
STL4:30 pmLambert-St Louis
33h 10m
2 stops
KIX4:40 pmOsaka Kansai Intl
Mar 3
KIX6:35 pmOsaka Kansai Intl
37h 09m
1 stop
STL4:44 pmLambert-St Louis
$802
United Airlines
Feb 19
STL6:00 pmLambert-St Louis
31h 40m
2 stops
KIX4:40 pmOsaka Kansai Intl
Feb 23
KIX6:35 pmOsaka Kansai Intl
40h 51m
2 stops
STL8:26 pmLambert-St Louis
$871

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
Apr 5
STL8:21 amLambert-St Louis
42h 04m
2 stops
KIX4:25 pmOsaka Kansai Intl
Apr 23
KIX6:00 pmOsaka Kansai Intl
42h 56m
2 stops
STL10:56 pmLambert-St Louis
$876
Air Canada
Apr 7
STL7:45 amLambert-St Louis
42h 40m
2 stops
KIX4:25 pmOsaka Kansai Intl
Apr 23
KIX6:00 pmOsaka Kansai Intl
41h 08m
2 stops
STL9:08 pmLambert-St Louis
$882
Air Canada
Jun 3
STL1:00 pmLambert-St Louis
37h 25m
2 stops
KIX4:25 pmOsaka Kansai Intl
Jun 12
KIX6:00 pmOsaka Kansai Intl
35h 46m
2 stops
STL3:46 pmLambert-St Louis
$891

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 January 28, 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

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/24

4:30 pm-4:40 pm

2 stops33h 10m

Osaka Kansai Intl

Tue 3/3

6:35 pm-9:23 am

2 stops29h 48m

$793

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/24

4:30 pm-4:40 pm

2 stops33h 10m

Osaka Kansai Intl

Tue 3/3

6:35 pm-4:44 pm

1 stop37h 09m

$802

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

2:19 pm-8:25 am

2 stops27h 06m

Osaka Kansai Intl

Sat 2/28

7:00 am-1:50 pm

2 stops21h 50m

$856

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

2:19 pm-8:25 am

2 stops27h 06m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:59 pm

1 stop21h 09m

$860

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 2/19

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Mon 2/23

6:35 pm-8:26 pm

2 stops40h 51m

$871

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 4/5

8:21 am-4:25 pm

2 stops42h 04m

Osaka Kansai Intl

Thu 4/23

6:00 pm-10:56 pm

2 stops42h 56m

$876

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 4/7

7:45 am-4:25 pm

2 stops42h 40m

Osaka Kansai Intl

Thu 4/23

6:00 pm-9:08 pm

2 stops41h 08m

$882

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 3/9

6:51 am-4:40 pm

1 stop19h 49m

Osaka Kansai Intl

Wed 3/25

8:20 am-11:51 pm

2 stops29h 31m

$889

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 6/3

1:00 pm-4:25 pm

2 stops37h 25m

Osaka Kansai Intl

Fri 6/12

6:00 pm-3:46 pm

2 stops35h 46m

$891

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 3/9

5:15 am-4:40 pm

2 stops21h 25m

Osaka Kansai Intl

Wed 3/25

6:35 pm-9:21 am

2 stops28h 46m

$892

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 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 6% 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

18h 55m

Direct flights

None
The fastest flight from St. Louis to Osaka Kansai Intl Airport takes 18h 55m
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

  • 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 18h 55m.

  • 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
Nara
Himeji
Izumisano
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?

Price alerts on flights to Osaka from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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
Fri 2/27
Fri 3/6
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 Narita Airportfrom $375
Flights to Tokyo Haneda Airportfrom $512
Flights to Osaka Itami Airportfrom $550
Flights to Nagoya Chubu Centrair Intl Airportfrom $557