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Cheap flights from Australia to St. Louis from $792

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 7/15. 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

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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.
Air Canada Logo
6:00 am - 12:06 pm
MEL
-
STL
45h 06m
3 stops
Air Canada Logo
2:15 pm - 11:05 am
STL
-
MEL
29h 50m
3 stops
$1,168Air Canada
Fri, May 29 - Tue, Jun 2
Air Canada Logo
9:20 am - 12:06 pm
SYD
-
STL
41h 46m
2 stops
Air Canada Logo
1:38 pm - 7:20 am
STL
-
SYD
26h 42m
2 stops
$1,232Air Canada
Wed, May 20 - Thu, May 28
Multiple Airlines Logo
6:00 am - 11:59 pm
SYD
-
STL
32h 59m
2 stops
Multiple Airlines Logo
6:35 am - 11:50 am
STL
-
SYD
38h 15m
2 stops
$1,338Multiple Airlines
Tue, May 19 - Tue, Jun 16
Qantas Airways Logo
9:10 am - 11:59 pm
SYD
-
STL
29h 49m
1 stop
Qantas Airways Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
$1,397Qantas Airways
Tue, May 19 - Tue, Jun 16
Delta Logo
10:00 am - 11:59 pm
MEL
-
STL
28h 59m
2 stops
Delta Logo
1:27 pm - 7:50 am
STL
-
MEL
27h 23m
2 stops
$1,398Delta
Sun, May 17 - Fri, May 22
Delta Logo
10:00 am - 7:03 pm
MEL
-
STL
24h 03m
2 stops
Delta Logo
2:27 pm - 7:50 am
STL
-
MEL
50h 23m
2 stops
$1,401Delta
Sun, May 17 - Thu, May 21
Qantas Airways Logo
6:25 am - 11:59 pm
SYD
-
STL
32h 34m
2 stops
Qantas Airways Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
$1,419Qantas Airways
Tue, May 19 - Tue, Jun 16
United Airlines Logo
10:55 am - 9:22 pm
MEL
-
STL
25h 27m
2 stops
United Airlines Logo
7:06 pm - 8:15 am
STL
-
MEL
22h 09m
1 stop
$1,680United Airlines
Mon, Sep 7 - Sun, Sep 27
United Airlines Logo
10:55 am - 6:24 pm
MEL
-
STL
22h 29m
1 stop
United Airlines Logo
8:50 am - 8:15 am
STL
-
MEL
32h 25m
2 stops
$1,683United Airlines
Mon, Sep 7 - Sun, Sep 27
Multiple Airlines Logo
12:10 pm - 5:42 pm
MEL
-
STL
44h 32m
2 stops
Multiple Airlines Logo
8:55 am - 11:05 am
STL
-
MEL
35h 10m
3 stops
$1,702Multiple Airlines
Thu, Jul 23 - Mon, Jul 27

United Airlines flights from Australia to St. Louis

Our best United Airlines deals on Australia to St. Louis flight tickets
United Airlines
May 19
SYD10:20 amSydney Kingsford Smith
23h 02m
1 stop
STL6:22 pmLambert-St Louis
Jun 16
STL7:23 pmLambert-St Louis
20h 32m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,448
United Airlines
May 19
SYD10:20 amSydney Kingsford Smith
23h 02m
1 stop
STL6:22 pmLambert-St Louis
Jun 16
STL7:23 pmLambert-St Louis
20h 32m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,449
United Airlines
May 19
SYD10:20 amSydney Kingsford Smith
23h 02m
1 stop
STL6:22 pmLambert-St Louis
Jun 9
STL7:23 pmLambert-St Louis
20h 32m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,452

Air Canada flights from Australia to St. Louis

Our best Air Canada deals on Australia to St. Louis flight tickets
Air Canada
May 29
MEL6:00 amMelbourne
45h 06m
3 stops
STL12:06 pmLambert-St Louis
Jun 2
STL2:15 pmLambert-St Louis
29h 50m
3 stops
MEL11:05 amMelbourne
$1,168
Air Canada
May 20
SYD9:20 amSydney Kingsford Smith
41h 46m
2 stops
STL12:06 pmLambert-St Louis
May 28
STL1:38 pmLambert-St Louis
26h 42m
2 stops
SYD7:20 amSydney Kingsford Smith
$1,232
Air Canada
May 20
SYD9:20 amSydney Kingsford Smith
41h 46m
2 stops
STL12:06 pmLambert-St Louis
May 28
STL1:05 pmLambert-St Louis
51h 15m
3 stops
SYD7:20 amSydney Kingsford Smith
$1,292

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 April 8, 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

Fri 5/29

6:00 am-12:06 pm

3 stops45h 06m

Lambert-St Louis

Tue 6/2

2:15 pm-11:05 am

3 stops29h 50m

$1,168

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Thu 5/28

1:38 pm-7:20 am

2 stops26h 42m

$1,232

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 5/19

6:00 am-11:59 pm

2 stops32h 59m

Lambert-St Louis

Tue 6/16

6:35 am-11:50 am

2 stops38h 15m

$1,338

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 5/19

9:10 am-11:59 pm

1 stop29h 49m

Lambert-St Louis

Tue 6/16

6:35 am-7:05 am

1 stop33h 30m

$1,397

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 5/17

10:00 am-11:59 pm

2 stops28h 59m

Lambert-St Louis

Fri 5/22

1:27 pm-7:50 am

2 stops27h 23m

$1,398

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 5/17

10:00 am-7:03 pm

2 stops24h 03m

Lambert-St Louis

Thu 5/21

2:27 pm-7:50 am

2 stops50h 23m

$1,401

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 5/19

6:25 am-11:59 pm

2 stops32h 34m

Lambert-St Louis

Tue 6/16

6:35 am-7:05 am

1 stop33h 30m

$1,419
Quickest round-trip

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 9/7

10:55 am-9:22 pm

2 stops25h 27m

Lambert-St Louis

Sun 9/27

7:06 pm-8:15 am

1 stop22h 09m

$1,680

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 9/7

10:55 am-6:24 pm

1 stop22h 29m

Lambert-St Louis

Sun 9/27

8:50 am-8:15 am

2 stops32h 25m

$1,683

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 7/23

12:10 pm-5:42 pm

2 stops44h 32m

Lambert-St Louis

Mon 7/27

8:55 am-11:05 am

3 stops35h 10m

$1,702

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, September 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 $948. The month of May is another great option to travel to St. Louis, with average flight prices from Australia averaging around $1,114.

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

24h 44m

Direct flights

None
The fastest flight from Australia to St. Louis takes 24h 44m
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
9,551 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Eureka
Edwardsville
Litchfield
Shrewsbury
Grafton

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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