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Cheap flights from St. Louis to Osaka from $611

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 7/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:01 am - 7:50 pm
STL
-
ITM
22h 49m
2 stops
American Airlines Logo
2:35 pm - 10:00 pm
ITM
-
STL
21h 25m
2 stops
$1,184American Airlines
Tue, Sep 15 - Tue, Sep 22
ANA Logo
6:14 am - 6:10 pm
STL
-
ITM
21h 56m
2 stops
ANA Logo
2:00 pm - 6:16 pm
ITM
-
STL
18h 16m
2 stops
$1,223ANA
Tue, Sep 15 - Tue, Sep 22
Delta Logo
6:00 am - 8:45 pm
STL
-
KIX
24h 45m
2 stops
Delta Logo
12:35 pm - 11:37 pm
KIX
-
STL
25h 02m
2 stops
$1,241Delta
Tue, Sep 15 - Tue, Sep 22
American Airlines Logo
5:42 am - 7:10 pm
STL
-
ITM
23h 28m
2 stops
American Airlines Logo
4:30 pm - 11:02 pm
ITM
-
STL
20h 32m
2 stops
$1,283American Airlines
Fri, Sep 4 - Sat, Sep 12
Delta Logo
6:20 am - 8:45 pm
STL
-
KIX
24h 25m
2 stops
Delta Logo
2:15 am - 12:41 am
KIX
-
STL
36h 26m
2 stops
$1,319Delta
Sat, Aug 8 - Sat, Aug 15
Cathay Pacific Logo
3:33 pm - 2:50 pm
STL
-
KIX
33h 17m
3 stops
Cathay Pacific Logo
9:45 am - 11:41 pm
KIX
-
STL
27h 56m
2 stops
$1,344Cathay Pacific
Tue, Sep 15 - Tue, Sep 22
Cathay Pacific Logo
3:33 pm - 2:50 pm
STL
-
KIX
33h 17m
3 stops
Cathay Pacific Logo
4:15 pm - 10:00 pm
KIX
-
STL
43h 45m
3 stops
$1,360Cathay Pacific
Tue, Sep 15 - Tue, Sep 22
ANA Logo
9:16 am - 6:10 pm
STL
-
ITM
18h 54m
2 stops
ANA Logo
3:30 pm - 12:13 pm
ITM
-
STL
34h 43m
2 stops
$1,587ANA
Tue, Sep 15 - Tue, Sep 22
Japan Airlines Logo
6:00 am - 8:25 pm
STL
-
ITM
24h 25m
2 stops
Japan Airlines Logo
8:20 am - 4:24 pm
ITM
-
STL
22h 04m
2 stops
$1,658Japan Airlines
Mon, Aug 24 - Fri, Aug 28
Japan Airlines Logo
9:31 am - 8:25 pm
STL
-
ITM
20h 54m
2 stops
Japan Airlines Logo
7:25 am - 10:55 pm
ITM
-
STL
29h 30m
2 stops
$1,689Japan Airlines
Wed, Aug 5 - Fri, Aug 14

Japan Airlines flights from St. Louis to Osaka

Our best Japan Airlines deals on St. Louis to Osaka flight tickets
Japan Airlines
Nov 8
STL7:00 amLambert-St Louis
20h 50m
1 stop
KIX6:50 pmOsaka Kansai Intl
Nov 16
KIX3:00 pmOsaka Kansai Intl
37h 47m
2 stops
STL1:47 pmLambert-St Louis
$1,470
Japan Airlines
Sep 4
STL8:36 amLambert-St Louis
33h 59m
2 stops
KIX8:35 amOsaka Kansai Intl
Sep 12
KIX5:45 pmOsaka Kansai Intl
19h 17m
1 stop
STL11:02 pmLambert-St Louis
$1,483
Japan Airlines
Aug 24
STL6:00 amLambert-St Louis
36h 35m
2 stops
KIX8:35 amOsaka Kansai Intl
Aug 28
KIX5:45 pmOsaka Kansai Intl
19h 10m
1 stop
STL10:55 pmLambert-St Louis
$1,502

Air Canada flights from St. Louis to Osaka

Our best Air Canada deals on St. Louis to Osaka flight tickets
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
$1,466
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
34h 00m
2 stops
STL2:00 pmLambert-St Louis
$1,471
Air Canada
Sep 6
STL12:10 pmLambert-St Louis
38h 15m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 9
KIX6:00 pmOsaka Kansai Intl
34h 00m
1 stop
STL2:00 pmLambert-St Louis
$1,704

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 May 12, 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 - ITM

STLITM

Lambert-St Louis

Tue 9/15

7:01 am-7:50 pm

2 stops22h 49m

Osaka Itami

Tue 9/22

2:35 pm-10:00 pm

2 stops21h 25m

$1,184
Quickest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:14 am-6:10 pm

2 stops21h 56m

Osaka Itami

Tue 9/22

2:00 pm-6:16 pm

2 stops18h 16m

$1,223

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

6:00 am-8:45 pm

2 stops24h 45m

Osaka Kansai Intl

Tue 9/22

12:35 pm-11:37 pm

2 stops25h 02m

$1,241

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Fri 9/4

5:42 am-7:10 pm

2 stops23h 28m

Osaka Itami

Sat 9/12

4:30 pm-11:02 pm

2 stops20h 32m

$1,283

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 8/8

6:20 am-8:45 pm

2 stops24h 25m

Osaka Kansai Intl

Sat 8/15

2:15 am-12:41 am

2 stops36h 26m

$1,319

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

3:33 pm-2:50 pm

3 stops33h 17m

Osaka Kansai Intl

Tue 9/22

9:45 am-11:41 pm

2 stops27h 56m

$1,344

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

3:33 pm-2:50 pm

3 stops33h 17m

Osaka Kansai Intl

Tue 9/22

4:15 pm-10:00 pm

3 stops43h 45m

$1,360

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

9:16 am-6:10 pm

2 stops18h 54m

Osaka Itami

Tue 9/22

3:30 pm-12:13 pm

2 stops34h 43m

$1,587

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 8/24

6:00 am-8:25 pm

2 stops24h 25m

Osaka Itami

Fri 8/28

8:20 am-4:24 pm

2 stops22h 04m

$1,658

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

9:31 am-8:25 pm

2 stops20h 54m

Osaka Itami

Fri 8/14

7:25 am-10:55 pm

2 stops29h 30m

$1,689

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 typical price of a round-trip flight between St. Louis and Osaka?

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 13% 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 40m

Direct flights

None
The fastest flight from St. Louis to Osaka takes 19h 40m
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 40m 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