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Cheap flights from Australia to St. Louis from $597

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Australia to St. Louis departing on 7/16. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Australia to St. Louis

Recent round-trip flight deals from Australia to St. Louis

Enter your travel dates to find the best prices.
United Airlines Logo
10:55 am - 6:17 pm
MEL
-
STL
22h 22m
1 stop
United Airlines Logo
7:05 pm - 7:30 am
STL
-
MEL
45h 25m
2 stops
$953United Airlines
Mon, Aug 3 - Sun, Aug 9
Lufthansa Logo
10:55 am - 11:29 pm
MEL
-
STL
27h 34m
2 stops
Lufthansa Logo
12:59 pm - 8:15 am
STL
-
MEL
28h 16m
2 stops
$967Lufthansa
Thu, Aug 6 - Thu, Aug 13
American Airlines Logo
9:45 am - 10:59 pm
MEL
-
STL
28h 14m
1 stop
American Airlines Logo
3:35 pm - 6:45 am
STL
-
MEL
24h 10m
2 stops
$1,045American Airlines
Thu, Aug 6 - Thu, Aug 13
Qantas Airways Logo
9:10 am - 10:59 pm
SYD
-
STL
28h 49m
1 stop
Qantas Airways Logo
6:00 am - 7:05 am
STL
-
SYD
34h 05m
1 stop
$1,048Qantas Airways
Sat, Aug 22 - Sat, Aug 29
Delta Logo
10:00 am - 8:35 pm
MEL
-
STL
25h 35m
2 stops
Delta Logo
6:45 pm - 7:50 am
STL
-
MEL
46h 05m
2 stops
$1,063Delta
Wed, Sep 9 - Tue, Sep 22
American Airlines Logo
9:10 am - 9:48 pm
SYD
-
STL
27h 38m
2 stops
American Airlines Logo
2:30 pm - 7:05 am
STL
-
SYD
25h 35m
2 stops
$1,074American Airlines
Thu, Sep 10 - Sun, Sep 13
American Airlines Logo
9:10 am - 11:30 pm
SYD
-
STL
29h 20m
1 stop
American Airlines Logo
5:11 pm - 7:05 am
STL
-
SYD
22h 54m
2 stops
$1,075American Airlines
Thu, Sep 10 - Sun, Sep 13
Multiple Airlines Logo
8:15 am - 6:05 pm
MEL
-
STL
24h 50m
2 stops
Multiple Airlines Logo
6:00 am - 6:45 am
STL
-
MEL
33h 45m
1 stop
$1,081Multiple Airlines
Thu, Aug 6 - Thu, Aug 13
Qantas Airways Logo
1:35 pm - 6:04 pm
MEL
-
STL
19h 29m
1 stop
Qantas Airways Logo
6:30 am - 6:45 am
STL
-
MEL
33h 15m
1 stop
$1,088Qantas Airways
Wed, Sep 9 - Tue, Sep 22
Multiple Airlines Logo
12:00 pm - 4:14 pm
SYD
-
STL
19h 14m
1 stop
Multiple Airlines Logo
5:11 pm - 6:55 am
STL
-
SYD
22h 44m
1 stop
$1,097Multiple Airlines
Sat, Aug 22 - Sat, Aug 29

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American Airlines flights from Australia to St. Louis

Our best American Airlines deals on Australia to St. Louis flight tickets
American Airlines
Jul 14
SYD9:10 amSydney Kingsford Smith
22h 18m
2 stops
STL4:28 pmLambert-St Louis
Aug 25
STL6:00 amLambert-St Louis
36h 45m
2 stops
SYD9:45 amSydney Kingsford Smith
$1,008
American Airlines
Jul 14
SYD9:10 amSydney Kingsford Smith
22h 18m
2 stops
STL4:28 pmLambert-St Louis
Aug 21
STL3:32 pmLambert-St Louis
24h 33m
2 stops
SYD7:05 amSydney Kingsford Smith
$1,034
American Airlines
Jul 14
SYD9:10 amSydney Kingsford Smith
29h 49m
1 stop
STL11:59 pmLambert-St Louis
Aug 24
STL9:15 amLambert-St Louis
33h 55m
2 stops
SYD10:10 amSydney Kingsford Smith
$1,041

Qantas Airways flights from Australia to St. Louis

Our best Qantas Airways deals on Australia to St. Louis flight tickets
Qantas Airways
Jul 14
SYD5:50 pmSydney Kingsford Smith
21h 09m
1 stop
STL11:59 pmLambert-St Louis
Aug 25
STL6:00 amLambert-St Louis
34h 30m
1 stop
SYD7:30 amSydney Kingsford Smith
$984
Qantas Airways
Jul 14
SYD9:10 amSydney Kingsford Smith
29h 49m
1 stop
STL11:59 pmLambert-St Louis
Aug 22
STL6:00 amLambert-St Louis
34h 05m
1 stop
SYD7:05 amSydney Kingsford Smith
$1,029
Qantas Airways
Jul 14
SYD9:10 amSydney Kingsford Smith
29h 49m
1 stop
STL11:59 pmLambert-St Louis
Aug 21
STL3:32 pmLambert-St Louis
24h 23m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,030

momondo Fare Finder

 
Customize your flight search to find flights from Australia to St. Louis 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 11, 2026.
Use the filters below to find and compare flights from Australia to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 8/3

10:55 am-6:17 pm

1 stop22h 22m

Lambert-St Louis

Sun 8/9

7:05 pm-7:30 am

2 stops45h 25m

$953

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 8/6

10:55 am-11:29 pm

2 stops27h 34m

Lambert-St Louis

Thu 8/13

12:59 pm-8:15 am

2 stops28h 16m

$967

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 8/6

9:45 am-10:59 pm

1 stop28h 14m

Lambert-St Louis

Thu 8/13

3:35 pm-6:45 am

2 stops24h 10m

$1,045

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 8/22

9:10 am-10:59 pm

1 stop28h 49m

Lambert-St Louis

Sat 8/29

6:00 am-7:05 am

1 stop34h 05m

$1,048

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 9/9

10:00 am-8:35 pm

2 stops25h 35m

Lambert-St Louis

Tue 9/22

6:45 pm-7:50 am

2 stops46h 05m

$1,063

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 9/10

9:10 am-9:48 pm

2 stops27h 38m

Lambert-St Louis

Sun 9/13

2:30 pm-7:05 am

2 stops25h 35m

$1,074

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 9/10

9:10 am-11:30 pm

1 stop29h 20m

Lambert-St Louis

Sun 9/13

5:11 pm-7:05 am

2 stops22h 54m

$1,075

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 8/6

8:15 am-6:05 pm

2 stops24h 50m

Lambert-St Louis

Thu 8/13

6:00 am-6:45 am

1 stop33h 45m

$1,081

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 9/9

1:35 pm-6:04 pm

1 stop19h 29m

Lambert-St Louis

Tue 9/22

6:30 am-6:45 am

1 stop33h 15m

$1,088
Quickest round-trip

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 8/22

12:00 pm-4:14 pm

1 stop19h 14m

Lambert-St Louis

Sat 8/29

5:11 pm-6:55 am

1 stop22h 44m

$1,097

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 St. Louis from

How to get the cheapest flight ticket from Australia to St. Louis

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 St. Louis?

In general, April is the cheapest month to fly from Australia to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $707. The month of December is another great option to travel to St. Louis, with average flight prices from Australia averaging around $736.

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

You could potentially save up to 11% on your flight if you consider stops on a Australia to St. Louis flight.

Cheap Australia to St. Louis flight deals and tips

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

Fastest flight time

21h 04m

Direct flights

None
The fastest flight from Australia to St. Louis takes 21h 04m
There are no direct flights from Australia to St. Louis. There are no popular flight routes from Australia to St. Louis.
Search flight deals

Frequently asked questions about flying from Australia to St. Louis

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

    Prices for flights from Australia to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Australia to Lambert-St Louis Airport?

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

    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 Australia to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Australia to St. Louis

Compare and see reviews for airlines that fly from Australia to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $822Free CancellationRating
7.4
9,976 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
St. Peters
O'Fallon
Collinsville
Alton
Farmington
Wentzville
Clayton
Fenton
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

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

It is quick and easy to find Australia to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Australia.

I’m not ready to book a flight from Australia to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Australia 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.

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