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Cheap flights from Australia to St. Louis from $583

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 6/26. 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

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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.
Delta Logo
9:10 am - 11:25 pm
MEL
-
STL
30h 15m
2 stops
Delta Logo
12:28 pm - 7:00 am
STL
-
MEL
26h 32m
2 stops
$900Delta
Wed, Mar 18 - Wed, Mar 25
Air Canada Logo
9:20 am - 2:02 pm
SYD
-
STL
43h 42m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
55h 25m
2 stops
$1,022Air Canada
Thu, Aug 6 - Sat, Aug 29
Air Canada Logo
9:20 am - 2:02 pm
SYD
-
STL
43h 42m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
55h 25m
2 stops
$1,024Air Canada
Thu, Aug 6 - Sat, Aug 29
American Airlines Logo
11:20 am - 11:58 pm
SYD
-
STL
28h 38m
1 stop
American Airlines Logo
4:13 pm - 9:00 am
STL
-
SYD
24h 47m
2 stops
$1,044American Airlines
Wed, Mar 18 - Wed, Mar 25
Air Canada Logo
9:20 am - 8:42 pm
SYD
-
STL
50h 22m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
55h 25m
2 stops
$1,049Air Canada
Tue, Aug 4 - Thu, Aug 27
American Airlines Logo
11:20 am - 7:29 pm
SYD
-
STL
24h 09m
2 stops
American Airlines Logo
6:38 am - 9:00 am
STL
-
SYD
34h 22m
1 stop
$1,057American Airlines
Thu, Mar 12 - Mon, Mar 16
United Airlines Logo
10:20 am - 8:42 pm
SYD
-
STL
25h 22m
2 stops
United Airlines Logo
6:49 pm - 6:55 am
STL
-
SYD
45h 06m
2 stops
$1,062United Airlines
Thu, Aug 6 - Sat, Aug 29
United Airlines Logo
10:20 am - 8:43 pm
SYD
-
STL
25h 23m
2 stops
United Airlines Logo
8:50 am - 7:00 am
STL
-
SYD
55h 10m
2 stops
$1,075United Airlines
Thu, Aug 6 - Sat, Aug 29
Multiple Airlines Logo
4:05 pm - 10:58 pm
MEL
-
STL
22h 53m
1 stop
Multiple Airlines Logo
6:50 pm - 11:25 am
STL
-
MEL
24h 35m
2 stops
$1,199Multiple Airlines
Wed, Mar 18 - Wed, Mar 25
Qantas Airways Logo
12:00 pm - 11:58 pm
MEL
-
STL
27h 58m
1 stop
Qantas Airways Logo
4:13 pm - 5:00 am
STL
-
MEL
20h 47m
1 stop
$1,470Qantas Airways
Wed, Mar 18 - Wed, Mar 25

Qantas Airways flights from Australia to St. Louis

Our best Qantas Airways deals on Australia to St. Louis flight tickets
Qantas Airways
Aug 5
SYD5:50 pmSydney Kingsford Smith
20h 18m
1 stop
STL11:08 pmLambert-St Louis
Aug 29
STL7:46 pmLambert-St Louis
20h 09m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,087
Qantas Airways
Apr 26
SYD9:10 amSydney Kingsford Smith
29h 47m
1 stop
STL11:57 pmLambert-St Louis
May 2
STL3:38 pmLambert-St Louis
24h 17m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,162
Qantas Airways
Mar 18
MEL12:00 pmMelbourne
27h 58m
1 stop
STL11:58 pmLambert-St Louis
Mar 25
STL4:13 pmLambert-St Louis
20h 47m
1 stop
MEL5:00 amMelbourne
$1,470

Cathay Pacific flights from Australia to St. Louis

Our best Cathay Pacific deals on Australia to St. Louis flight tickets
Cathay Pacific
Mar 28
MEL4:30 pmMelbourne
46h 28m
3 stops
STL10:58 pmLambert-St Louis
Apr 4
STL10:33 amLambert-St Louis
38h 17m
3 stops
MEL4:50 pmMelbourne
$2,327
Cathay Pacific
Mar 28
MEL4:30 pmMelbourne
46h 28m
3 stops
STL10:58 pmLambert-St Louis
Apr 4
STL10:33 amLambert-St Louis
38h 17m
3 stops
MEL4:50 pmMelbourne
$2,330

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 February 21, 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

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 3/18

9:10 am-11:25 pm

2 stops30h 15m

Lambert-St Louis

Wed 3/25

12:28 pm-7:00 am

2 stops26h 32m

$900

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/6

9:20 am-2:02 pm

2 stops43h 42m

Lambert-St Louis

Sat 8/29

8:55 am-7:20 am

2 stops55h 25m

$1,022

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/6

9:20 am-2:02 pm

2 stops43h 42m

Lambert-St Louis

Sat 8/29

8:55 am-7:20 am

2 stops55h 25m

$1,024

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/18

11:20 am-11:58 pm

1 stop28h 38m

Lambert-St Louis

Wed 3/25

4:13 pm-9:00 am

2 stops24h 47m

$1,044

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 8/4

9:20 am-8:42 pm

2 stops50h 22m

Lambert-St Louis

Thu 8/27

8:55 am-7:20 am

2 stops55h 25m

$1,049

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

11:20 am-7:29 pm

2 stops24h 09m

Lambert-St Louis

Mon 3/16

6:38 am-9:00 am

1 stop34h 22m

$1,057

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/6

10:20 am-8:42 pm

2 stops25h 22m

Lambert-St Louis

Sat 8/29

6:49 pm-6:55 am

2 stops45h 06m

$1,062

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/6

10:20 am-8:43 pm

2 stops25h 23m

Lambert-St Louis

Sat 8/29

8:50 am-7:00 am

2 stops55h 10m

$1,075

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 3/18

4:05 pm-10:58 pm

1 stop22h 53m

Lambert-St Louis

Wed 3/25

6:50 pm-11:25 am

2 stops24h 35m

$1,199

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 3/18

12:00 pm-11:58 pm

1 stop27h 58m

Lambert-St Louis

Wed 3/25

4:13 pm-5:00 am

1 stop20h 47m

$1,470

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, August 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 $1,153. The month of April is another great option to travel to St. Louis, with average flight prices from Australia averaging around $1,186.

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

19h 51m

Direct flights

None
The fastest flight from Australia to St. Louis takes 19h 51m
There are no direct flights from Australia to St. Louis. There are no popular flight routes from Australia to St. Louis.
Search flight deals

  • 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
9,341 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,101Free CancellationRating
7.5
996 reviews
Search Qantas Airways 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
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Wentzville
Fenton
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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