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Cheap flights from St. Louis to Osaka from $463

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 8/13. 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
2:40 pm - 4:25 pm
STL
-
KIX
35h 45m
2 stops
Air Canada Logo
6:00 pm - 2:00 pm
KIX
-
STL
34h 00m
2 stops
$974Air Canada
Sun, Sep 20 - Sat, Sep 26
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
Multiple Airlines Logo
5:00 am - 5:40 pm
STL
-
KIX
22h 40m
2 stops
Multiple Airlines Logo
7:35 am - 3:26 pm
KIX
-
STL
46h 51m
2 stops
$1,021Multiple Airlines
Wed, Oct 28 - Wed, Nov 11
ANA Logo
6:15 am - 7:10 pm
STL
-
ITM
22h 55m
2 stops
ANA Logo
7:30 am - 11:57 am
ITM
-
STL
18h 27m
2 stops
$1,102ANA
Tue, Sep 15 - Tue, Sep 22
ANA Logo
9:20 am - 7:25 am
STL
-
ITM
32h 05m
2 stops
ANA Logo
7:00 pm - 12:02 pm
ITM
-
STL
31h 02m
2 stops
$1,204ANA
Tue, Aug 4 - Tue, Aug 11
ANA Logo
8:50 am - 8:15 pm
STL
-
ITM
21h 25m
2 stops
ANA Logo
8:00 am - 12:13 pm
ITM
-
STL
18h 13m
2 stops
$1,239ANA
Sun, Aug 16 - Wed, Sep 30

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Cathay Pacific flights from St. Louis to Osaka

Our best Cathay Pacific deals on St. Louis to Osaka 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

Our best Air Canada deals on St. Louis to Osaka 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
Sep 20
STL2:40 pmLambert-St Louis
35h 45m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 26
KIX6:00 pmOsaka Kansai Intl
34h 00m
2 stops
STL2:00 pmLambert-St Louis
$974

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Osaka 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 18, 2026.
Use the filters below to find and compare flights from St. Louis to Osaka 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

Sun 9/20

2:40 pm-4:25 pm

2 stops35h 45m

Osaka Kansai Intl

Sat 9/26

6:00 pm-2:00 pm

2 stops34h 00m

$974

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

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

Wed 10/28

5:00 am-5:40 pm

2 stops22h 40m

Osaka Kansai Intl

Wed 11/11

7:35 am-3:26 pm

2 stops46h 51m

$1,021

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:15 am-7:10 pm

2 stops22h 55m

Osaka Itami

Tue 9/22

7:30 am-11:57 am

2 stops18h 27m

$1,102

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 8/4

9:20 am-7:25 am

2 stops32h 05m

Osaka Itami

Tue 8/11

7:00 pm-12:02 pm

2 stops31h 02m

$1,204
Quickest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/16

8:50 am-8:15 pm

2 stops21h 25m

Osaka Itami

Wed 9/30

8:00 am-12:13 pm

2 stops18h 13m

$1,239

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

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?

In general, April is the cheapest month to fly from St. Louis to Osaka. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Osaka during the month of April, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $0.

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

You could potentially save up to 34% on your flight if you consider stops on a St. Louis to Osaka flight.

When to book flights from St. Louis to Osaka

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

Cheap St. Louis to Osaka (STL to OSA) flight deals and tips

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

Fastest flight time

19h 15m

Direct flights

None
The fastest flight from St. Louis to Osaka takes 19h 15m
There are no direct flights from St. Louis to Osaka. There are no popular flight routes from St. Louis to Osaka.
Search flight deals

Frequently asked questions about flying from St. Louis to Osaka

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

    The straight-line distance from Lambert-St Louis to Osaka is 6585.1 mi. 19h 15m is a normal flight duration for this route.

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

    Prices for flights from Lambert-St Louis Airport to Osaka are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Osaka.

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

    The travel and health documents you'll need for your trip to Osaka may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Osaka. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Osaka?

Traveling to a place near Osaka?

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

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Osaka?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Osaka. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Osaka from St. Louis with this policy.

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

momondo helps you find the best flight between St. Louis and Osaka by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis 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 St. Louis and alert you when they change.

An easier way to manage your Osaka trip

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Find better results for your trip to Japan

Fly into one of these airports located in Osaka

Airports listed have a maximum distance of 22.5 mi from Osaka
Osaka Itami Airport
Osaka Kansai Intl Airport