Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from St. Louis to Osaka from $442

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 12/8. 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

Air Canada Logo
1:30 pm - 4:25 pmSTL-KIX
36h 55m2 stops
Air Canada Logo
6:05 pm - 6:23 pmKIX-STL
38h 18m2 stops
$788Air Canada
Find Deal
Mon, Sep 15 - Mon, Sep 22
United Airlines Logo
5:11 pm - 2:50 pmSTL-KIX
31h 39m2 stops
United Airlines Logo
4:50 pm - 8:46 pmKIX-STL
17h 56m2 stops
$852United Airlines
Find Deal
Sat, Sep 27 - Wed, Oct 1
Delta Logo
6:40 am - 11:20 amSTL-KIX
38h 40m2 stops
Delta Logo
12:35 pm - 11:14 pmKIX-STL
24h 39m2 stops
$873Delta
Find Deal
Sun, Sep 14 - Sun, Sep 21
Japan Airlines Logo
9:56 am - 7:30 pmSTL-KIX
19h 34m2 stops
Japan Airlines Logo
5:55 pm - 10:59 pmKIX-STL
19h 04m1 stop
$955Japan Airlines
Find Deal
Tue, Sep 23 - Sun, Oct 5
Japan Airlines Logo
6:25 am - 6:50 pmSTL-KIX
21h 25m1 stop
Japan Airlines Logo
5:50 pm - 11:59 pmKIX-STL
21h 09m1 stop
$1,101Japan Airlines
Find Deal
Wed, Dec 17 - Wed, Jan 14
Delta Logo
8:40 am - 9:00 pmSTL-KIX
22h 20m2 stops
Delta Logo
9:05 am - 11:24 pmKIX-STL
28h 19m2 stops
$1,121Delta
Find Deal
Wed, Sep 24 - Sun, Oct 5
American Airlines Logo
5:28 am - 6:50 pmSTL-KIX
22h 22m2 stops
American Airlines Logo
5:50 pm - 11:32 pmKIX-STL
20h 42m2 stops
$1,134American Airlines
Find Deal
Wed, Dec 17 - Wed, Jan 14
Cathay Pacific Logo
3:59 pm - 2:55 pmSTL-KIX
32h 56m3 stops
Cathay Pacific Logo
9:10 am - 10:50 pmKIX-STL
27h 40m2 stops
$1,139Cathay Pacific
Find Deal
Mon, Sep 15 - Mon, Sep 22
Cathay Pacific Logo
3:59 pm - 2:55 pmSTL-KIX
32h 56m3 stops
Cathay Pacific Logo
6:35 pm - 10:50 pmKIX-STL
42h 15m2 stops
$1,195Cathay Pacific
Find Deal
Sat, Sep 20 - Sun, Sep 28
American Airlines Logo
6:20 am - 6:45 pmSTL-KIX
22h 25m1 stop
American Airlines Logo
5:55 pm - 10:59 pmKIX-STL
19h 04m1 stop
$1,289American Airlines
Find Deal
Sat, Sep 20 - Sun, Sep 28

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
STL1:30 pmLambert-St Louis
36h 55m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 22
KIX6:05 pmOsaka Kansai Intl
38h 18m
2 stops
STL6:23 pmLambert-St Louis
$788
Find similar
Air Canada
Sep 14
STL1:30 pmLambert-St Louis
36h 55m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 21
KIX6:05 pmOsaka Kansai Intl
35h 13m
1 stop
STL3:18 pmLambert-St Louis
$909
Find similar
Air Canada
Sep 20
STL9:15 amLambert-St Louis
17h 10m
1 stop
KIX4:25 pmOsaka Kansai Intl
Sep 28
KIX6:05 pmOsaka Kansai Intl
35h 13m
1 stop
STL3:18 pmLambert-St Louis
$978
Find similar

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

Our best Japan Airlines deals on St. Louis to Osaka Kansai Intl Airport flight tickets
Japan Airlines
Sep 23
STL9:56 amLambert-St Louis
19h 34m
2 stops
KIX7:30 pmOsaka Kansai Intl
Oct 5
KIX5:55 pmOsaka Kansai Intl
19h 04m
1 stop
STL10:59 pmLambert-St Louis
$955
Find similar
Japan Airlines
Dec 17
STL6:25 amLambert-St Louis
21h 25m
1 stop
KIX6:50 pmOsaka Kansai Intl
Jan 14
KIX5:50 pmOsaka Kansai Intl
21h 09m
1 stop
STL11:59 pmLambert-St Louis
$1,101
Find similar
Japan Airlines
Dec 17
STL6:25 amLambert-St Louis
21h 25m
1 stop
KIX6:50 pmOsaka Kansai Intl
Jan 14
KIX6:45 amOsaka Kansai Intl
19h 23m
2 stops
STL11:08 amLambert-St Louis
$1,103
Find similar

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 August 2, 2025.
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

Mon 9/15

1:30 pm-4:25 pm

2 stops36h 55m

Osaka Kansai Intl

Mon 9/22

6:05 pm-6:23 pm

2 stops38h 18m

$788

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

5:11 pm-2:50 pm

2 stops31h 39m

Osaka Kansai Intl

Wed 10/1

4:50 pm-8:46 pm

2 stops17h 56m

$852

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 9/14

6:40 am-11:20 am

2 stops38h 40m

Osaka Kansai Intl

Sun 9/21

12:35 pm-11:14 pm

2 stops24h 39m

$873

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/23

9:56 am-7:30 pm

2 stops19h 34m

Osaka Kansai Intl

Sun 10/5

5:55 pm-10:59 pm

1 stop19h 04m

$955

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 12/17

6:25 am-6:50 pm

1 stop21h 25m

Osaka Kansai Intl

Wed 1/14

5:50 pm-11:59 pm

1 stop21h 09m

$1,101

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 9/24

8:40 am-9:00 pm

2 stops22h 20m

Osaka Kansai Intl

Sun 10/5

9:05 am-11:24 pm

2 stops28h 19m

$1,121

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 12/17

5:28 am-6:50 pm

2 stops22h 22m

Osaka Kansai Intl

Wed 1/14

5:50 pm-11:32 pm

2 stops20h 42m

$1,134

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 9/15

3:59 pm-2:55 pm

3 stops32h 56m

Osaka Kansai Intl

Mon 9/22

9:10 am-10:50 pm

2 stops27h 40m

$1,139

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

3:59 pm-2:55 pm

3 stops32h 56m

Osaka Kansai Intl

Sun 9/28

6:35 pm-10:50 pm

2 stops42h 15m

$1,195

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

6:20 am-6:45 pm

1 stop22h 25m

Osaka Kansai Intl

Sun 9/28

5:55 pm-10:59 pm

1 stop19h 04m

$1,289

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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

What is the cheapest day to depart on your flight to Osaka Kansai Intl Airport?

The cheapest day to depart from St. Louis to Osaka Kansai Intl Airport is on a Sunday. Travelers who choose to depart for Osaka Kansai Intl Airport on a Sunday will often find tickets for as low as $1,214. Flights from St. Louis to Osaka Kansai Intl Airport on a Monday will generally be more expensive and average around $1,861. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Osaka Kansai Intl Airport?

Our data shows that the cheapest St. Louis to Osaka Kansai Intl Airport flights are usually those with departure times in the evening. Our users have found flights to Osaka Kansai Intl Airport in the evening for as low as $1,214. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,861 on average. Flights to Osaka Kansai Intl Airport from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Best Price Found

$442

Fastest flight time

17h 10m

Direct flights

None
The best one-way flight to Osaka Kansai Intl Airport from St. Louis in the past 72 hours is $442. The best round-trip flight deal from St. Louis to Osaka Kansai Intl Airport found on momondo in the last 72 hours is $788.
The fastest flight from St. Louis to Osaka Kansai Intl Airport takes 17h 10m
There are no direct flights from St. Louis to Osaka Kansai Intl Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - 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 17h 10m.

  • 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
Thu 8/7
Thu 8/14
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 $464
Flights to Tokyo Narita Airportfrom $416
Flights to Osaka Itami Airportfrom $528
Flights to Nagoya Chubu Centrair Intl Airportfrom $530