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Cheap flights from St. Louis to Australia from $1,041

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 Australia departing on 19/11. 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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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
08:45 - 08:45STL-BNE
32h 00m2 stops
Air Canada Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,379Air Canada
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Sun, 1 Feb - Sun, 15 Feb
Multiple Airlines Logo
14:45 - 08:45STL-BNE
26h 00m2 stops
Multiple Airlines Logo
06:10 - 15:29BNE-STL
49h 19m3 stops
$1,407Multiple Airlines
Find Deal
Sun, 1 Feb - Sun, 15 Feb
Multiple Airlines Logo
16:05 - 13:30STL-BNE
53h 25m3 stops
Multiple Airlines Logo
06:10 - 15:29BNE-STL
49h 19m3 stops
$1,445Multiple Airlines
Find Deal
Sun, 1 Feb - Sun, 15 Feb
Qantas Airways Logo
17:04 - 08:20STL-MEL
46h 16m2 stops
Qantas Airways Logo
12:00 - 23:48MEL-STL
28h 48m1 stop
$1,471Qantas Airways
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Mon, 2 Feb - Sat, 14 Feb
Qantas Airways Logo
17:04 - 22:45STL-MEL
36h 41m2 stops
Qantas Airways Logo
12:00 - 23:48MEL-STL
28h 48m1 stop
$1,515Qantas Airways
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Mon, 2 Feb - Sat, 14 Feb
American Airlines Logo
07:04 - 05:00STL-BNE
29h 56m1 stop
American Airlines Logo
19:40 - 23:48BNE-STL
20h 08m1 stop
$1,549American Airlines
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Sun, 1 Feb - Sun, 15 Feb
American Airlines Logo
09:25 - 06:30STL-BNE
29h 05m1 stop
American Airlines Logo
19:40 - 23:48BNE-STL
20h 08m1 stop
$1,558American Airlines
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Sun, 1 Feb - Sun, 15 Feb
Delta Logo
11:55 - 08:20STL-BNE
28h 25m2 stops
Delta Logo
10:40 - 23:38BNE-STL
28h 58m2 stops
$1,589Delta
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Mon, 16 Feb - Fri, 20 Feb
United Airlines Logo
17:30 - 13:40STL-CBR
27h 10m2 stops
United Airlines Logo
06:35 - 22:30CBR-STL
32h 55m2 stops
$3,061United Airlines
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Thu, 11 Dec - Thu, 18 Dec
United Airlines Logo
15:19 - 18:00STL-CBR
33h 41m3 stops
United Airlines Logo
06:35 - 22:30CBR-STL
32h 55m2 stops
$3,066United Airlines
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Thu, 11 Dec - Thu, 18 Dec

Air New Zealand flights from St. Louis to Australia

Our best Air New Zealand deals on St. Louis to Australia flight tickets
Air New Zealand
19 Mar
STL06:00Lambert-St Louis
34h 45m
2 stops
SYD08:45Sydney Kingsford Smith
29 Mar
SYD08:45Sydney Kingsford Smith
37h 07m
2 stops
STL05:52Lambert-St Louis
$2,181
Find similar
Air New Zealand
16 Jan
STL06:45Lambert-St Louis
33h 40m
2 stops
MEL09:25Melbourne
10 Feb
MEL08:35Melbourne
24h 02m
2 stops
STL15:37Lambert-St Louis
$2,371
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Air New Zealand
18 Nov
STL17:29Lambert-St Louis
31h 11m
2 stops
MEL17:40Melbourne
10 Dec
MEL08:35Melbourne
24h 52m
2 stops
STL16:27Lambert-St Louis
$2,397
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Alaska Airlines flights from St. Louis to Australia

Our best Alaska Airlines deals on St. Louis to Australia flight tickets
Alaska Airlines
3 Jan
STL07:00Lambert-St Louis
43h 45m
2 stops
SYD19:45Sydney Kingsford Smith
28 Feb
SYD21:40Sydney Kingsford Smith
33h 43m
2 stops
STL14:23Lambert-St Louis
$2,535
Find similar
Alaska Airlines
12 Jan
STL14:50Lambert-St Louis
59h 55m
2 stops
SYD19:45Sydney Kingsford Smith
3 Mar
SYD21:40Sydney Kingsford Smith
33h 11m
2 stops
STL13:51Lambert-St Louis
$2,623
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momondo Fare Finder

 
Customise your flight search to find flights from St. Louis to Australia 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 78,305 searches. Data last updated 14 November 2025.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/2

08:45-08:45

2 stops32h 00m

Brisbane

Sun 15/2

10:45-15:29

2 stops44h 44m

$1,379

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/2

14:45-08:45

2 stops26h 00m

Brisbane

Sun 15/2

06:10-15:29

3 stops49h 19m

$1,407

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/2

16:05-13:30

3 stops53h 25m

Brisbane

Sun 15/2

06:10-15:29

3 stops49h 19m

$1,445

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/2

17:04-08:20

2 stops46h 16m

Melbourne

Sat 14/2

12:00-23:48

1 stop28h 48m

$1,471

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/2

17:04-22:45

2 stops36h 41m

Melbourne

Sat 14/2

12:00-23:48

1 stop28h 48m

$1,515

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/2

07:04-05:00

1 stop29h 56m

Brisbane

Sun 15/2

19:40-23:48

1 stop20h 08m

$1,549

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 1/2

09:25-06:30

1 stop29h 05m

Brisbane

Sun 15/2

19:40-23:48

1 stop20h 08m

$1,558

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 16/2

11:55-08:20

2 stops28h 25m

Brisbane

Fri 20/2

10:40-23:38

2 stops28h 58m

$1,589

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Thu 11/12

17:30-13:40

2 stops27h 10m

Canberra

Thu 18/12

06:35-22:30

2 stops32h 55m

$3,061

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Thu 11/12

15:19-18:00

3 stops33h 41m

Canberra

Thu 18/12

06:35-22:30

2 stops32h 55m

$3,066

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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

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 Australia?

In general, August is the cheapest month to fly from St. Louis to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,946. If you don’t want to visit Australia in August, then you should wait until October to fly from St. Louis, when ticket prices are also cheap, with an average price of $2,031.

What is the cheapest time of day to depart on your flight to Australia?

According to our data, the cheapest time of day to fly to Australia is in the afternoon. momondo users have found flights departing from St. Louis to Australia in the afternoon for as low as $1,912. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Australia are more costly in the morning, with an average ticket price of $2,691. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You could potentially save up to 29% on your flight if you consider stops on a St. Louis to Australia flight.

Cheap St. Louis to Australia flight deals and tips

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

Direct flights

None
There are no direct flights from St. Louis to Australia. There are no popular flight routes from St. Louis to Australia.
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  • When did momondo last update prices for flights from Lambert-St Louis Airport to Australia?

    Prices for flights from Lambert-St Louis Airport to Australia are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Australia.

  • What documentation or ID do you need to fly to Australia?

    The travel and health documents you'll need for your trip to Australia 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 licence and a passport that is valid for six months after your intended arrival at Australia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Australia

Compare and see reviews for airlines that fly from St. Louis to Australia with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $2,004Free cancellationRating
7.4
9,017 reviews
Search United Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Australia. momondo saves you time and could save you money on your trip.

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

All flight searches from St. Louis to Australia on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Australia.

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

Price alerts on flights to Australia from St. Louis 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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