Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Osaka from $544

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 8/6. 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

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.
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
$938Air 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
$942Air Canada
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
2:40 pm - 4:25 pm
STL
-
KIX
59h 45m
2 stops
Multiple Airlines Logo
8:30 pm - 3:30 pm
KIX
-
STL
58h 00m
2 stops
$1,021Multiple Airlines
Wed, Sep 2 - Thu, Dec 17
Multiple Airlines Logo
2:40 pm - 4:25 pm
STL
-
KIX
35h 45m
1 stop
Multiple Airlines Logo
8:30 pm - 3:30 pm
KIX
-
STL
58h 00m
2 stops
$1,027Multiple Airlines
Wed, Sep 2 - Thu, Dec 17
Japan Airlines Logo
7:23 am - 7:50 pm
STL
-
ITM
22h 27m
2 stops
Japan Airlines Logo
7:05 am - 1:23 pm
ITM
-
STL
21h 18m
2 stops
$1,046Japan Airlines
Wed, Sep 2 - Thu, Dec 17
Japan Airlines Logo
6:30 am - 6:45 pm
STL
-
KIX
22h 15m
1 stop
Japan Airlines Logo
5:50 pm - 11:51 pm
KIX
-
STL
21h 01m
1 stop
$1,055Japan Airlines
Wed, Sep 2 - Thu, Dec 17
Japan Airlines Logo
8:30 am - 10:00 pm
STL
-
KIX
23h 30m
2 stops
Japan Airlines Logo
6:40 am - 3:48 pm
KIX
-
STL
23h 08m
2 stops
$1,067Japan Airlines
Wed, Aug 5 - Fri, Aug 14
United Airlines Logo
5:10 am - 5:05 pm
STL
-
ITM
45h 55m
3 stops
United Airlines Logo
12:50 pm - 7:31 pm
ITM
-
STL
20h 41m
2 stops
$1,094United Airlines
Sun, Aug 30 - Wed, Sep 2
United Airlines Logo
1:18 pm - 5:05 pm
STL
-
ITM
37h 47m
2 stops
United Airlines Logo
12:50 pm - 9:22 pm
ITM
-
STL
22h 32m
2 stops
$1,099United Airlines
Sun, Aug 30 - Wed, Sep 2
ANA Logo
9:23 am - 6:10 pm
STL
-
ITM
18h 47m
2 stops
ANA Logo
12:50 pm - 12:13 pm
ITM
-
STL
37h 23m
2 stops
$1,122ANA
Wed, Aug 5 - Thu, Aug 13

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
$938
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
$942
Air Canada
Sep 19
STL2:40 pmLambert-St Louis
35h 45m
2 stops
KIX4:25 pmOsaka Kansai Intl
Sep 23
KIX6:00 pmOsaka Kansai Intl
36h 26m
2 stops
STL4:26 pmLambert-St Louis
$1,091

Japan Airlines flights from St. Louis to Osaka

Our best Japan Airlines deals on St. Louis to Osaka flight tickets
Japan Airlines
Sep 2
STL7:23 amLambert-St Louis
22h 27m
2 stops
ITM7:50 pmOsaka Itami
Dec 17
ITM7:05 amOsaka Itami
21h 18m
2 stops
STL1:23 pmLambert-St Louis
$1,046
Japan Airlines
Sep 2
STL6:30 amLambert-St Louis
22h 15m
1 stop
KIX6:45 pmOsaka Kansai Intl
Dec 17
KIX5:50 pmOsaka Kansai Intl
21h 01m
1 stop
STL11:51 pmLambert-St Louis
$1,055
Japan Airlines
Aug 5
STL8:30 amLambert-St Louis
23h 30m
2 stops
KIX10:00 pmOsaka Kansai Intl
Aug 14
KIX6:40 amOsaka Kansai Intl
23h 08m
2 stops
STL3:48 pmLambert-St Louis
$1,067

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 March 25, 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

$938

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

$942

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 9/2

2:40 pm-4:25 pm

2 stops59h 45m

Osaka Kansai Intl

Thu 12/17

8:30 pm-3:30 pm

2 stops58h 00m

$1,021

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 9/2

2:40 pm-4:25 pm

1 stop35h 45m

Osaka Kansai Intl

Thu 12/17

8:30 pm-3:30 pm

2 stops58h 00m

$1,027

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 9/2

7:23 am-7:50 pm

2 stops22h 27m

Osaka Itami

Thu 12/17

7:05 am-1:23 pm

2 stops21h 18m

$1,046
Quickest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 9/2

6:30 am-6:45 pm

1 stop22h 15m

Osaka Kansai Intl

Thu 12/17

5:50 pm-11:51 pm

1 stop21h 01m

$1,055

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 8/5

8:30 am-10:00 pm

2 stops23h 30m

Osaka Kansai Intl

Fri 8/14

6:40 am-3:48 pm

2 stops23h 08m

$1,067

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/30

5:10 am-5:05 pm

3 stops45h 55m

Osaka Itami

Wed 9/2

12:50 pm-7:31 pm

2 stops20h 41m

$1,094

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/30

1:18 pm-5:05 pm

2 stops37h 47m

Osaka Itami

Wed 9/2

12:50 pm-9:22 pm

2 stops22h 32m

$1,099

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

9:23 am-6:10 pm

2 stops18h 47m

Osaka Itami

Thu 8/13

12:50 pm-12:13 pm

2 stops37h 23m

$1,122

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

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 airline that flies from Lambert-St Louis to Osaka?

Air Canada, Japan Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Osaka

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

18h 25m

Direct flights

None
The fastest flight from St. Louis to Osaka takes 18h 25m
There are no direct flights from St. Louis to Osaka. There are no popular flight routes from St. Louis to Osaka.
Search flight deals

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

    The straight-line distance from Lambert-St Louis to Osaka is 6585.1 mi. 18h 25m 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 many operators does momondo search for flights from Lambert-St Louis Airport to Osaka?

  • 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?

Best airlines flying from St. Louis to Osaka

Compare and see reviews for airlines that fly from St. Louis to Osaka with momondo
Airline
Rating
Free Cancellation
Price
Japan AirlinesPriceFrom $751Free CancellationRating
8.3
1,748 reviews
Search Japan Airlines flights

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

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 4/24
Fri 5/1
By creating a price alert you accept our terms of use and privacy policy.

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