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Cheap flights from St. Louis to Australia from $1,008

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 4/4. 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.
Multiple Airlines Logo
16:43 - 08:45STL-BNE
24h 02m2 stops
Multiple Airlines Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,497Multiple Airlines
Find Deal
Sat, 22 Nov - Fri, 26 Dec
Air Canada Logo
14:45 - 08:45STL-BNE
26h 00m2 stops
Air Canada Logo
06:05 - 15:29BNE-STL
49h 24m3 stops
$1,533Air Canada
Find Deal
Wed, 18 Feb - Tue, 24 Feb
Air Canada Logo
08:45 - 08:45STL-BNE
32h 00m2 stops
Air Canada Logo
10:45 - 14:29BNE-STL
43h 44m2 stops
$1,546Air Canada
Find Deal
Sun, 25 Jan - Sun, 8 Mar
American Airlines Logo
07:00 - 05:00STL-BNE
30h 00m1 stop
American Airlines Logo
09:40 - 12:37BNE-STL
18h 57m1 stop
$1,648American Airlines
Find Deal
Fri, 14 Nov - Mon, 24 Nov
American Airlines Logo
11:42 - 05:00STL-BNE
25h 18m2 stops
American Airlines Logo
09:40 - 16:27BNE-STL
22h 47m1 stop
$1,655American Airlines
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Fri, 14 Nov - Mon, 24 Nov
Qantas Airways Logo
07:04 - 09:00STL-SYD
32h 56m1 stop
Qantas Airways Logo
07:05 - 23:48SYD-STL
33h 43m2 stops
$1,662Qantas Airways
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Thu, 29 Jan - Wed, 18 Feb
United Airlines Logo
12:31 - 07:30STL-BNE
26h 59m2 stops
United Airlines Logo
11:40 - 16:28BNE-STL
20h 48m2 stops
$1,679United Airlines
Find Deal
Fri, 14 Nov - Mon, 24 Nov
United Airlines Logo
17:29 - 07:30STL-BNE
22h 01m1 stop
United Airlines Logo
11:40 - 22:30BNE-STL
26h 50m1 stop
$1,748United Airlines
Find Deal
Sat, 22 Nov - Fri, 26 Dec
Qantas Airways Logo
07:04 - 09:00STL-SYD
32h 56m1 stop
Qantas Airways Logo
19:15 - 16:14SYD-STL
37h 59m2 stops
$1,771Qantas Airways
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Sun, 25 Jan - Sun, 1 Feb
Fiji Airways Logo
18:00 - 11:45STL-SYD
26h 45m2 stops
Fiji Airways Logo
13:15 - 22:29SYD-STL
24h 14m2 stops
$2,006Fiji Airways
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Sat, 11 Apr - Sat, 25 Apr

Qantas Airways flights from St. Louis to Australia

Our best Qantas Airways deals on St. Louis to Australia flight tickets
Qantas Airways
29 Jan
STL07:04Lambert-St Louis
32h 56m
1 stop
SYD09:00Sydney Kingsford Smith
18 Feb
SYD07:05Sydney Kingsford Smith
33h 43m
2 stops
STL23:48Lambert-St Louis
$1,662
Find similar
Qantas Airways
11 Nov
STL07:00Lambert-St Louis
33h 30m
1 stop
MEL09:30Melbourne
3 Dec
MEL18:30Melbourne
35h 04m
2 stops
STL12:34Lambert-St Louis
$1,699
Find similar
Qantas Airways
25 Jan
STL07:04Lambert-St Louis
32h 56m
1 stop
SYD09:00Sydney Kingsford Smith
1 Feb
SYD19:15Sydney Kingsford Smith
37h 59m
2 stops
STL16:14Lambert-St Louis
$1,771
Find similar

Air Canada flights from St. Louis to Australia

Our best Air Canada deals on St. Louis to Australia flight tickets
Air Canada
18 Feb
STL14:45Lambert-St Louis
26h 00m
2 stops
BNE08:45Brisbane
24 Feb
BNE06:05Brisbane
49h 24m
3 stops
STL15:29Lambert-St Louis
$1,533
Find similar
Air Canada
25 Jan
STL08:45Lambert-St Louis
32h 00m
2 stops
BNE08:45Brisbane
8 Mar
BNE10:45Brisbane
43h 44m
2 stops
STL14:29Lambert-St Louis
$1,546
Find similar
Air Canada
22 Nov
STL16:43Lambert-St Louis
24h 02m
2 stops
BNE08:45Brisbane
26 Dec
BNE10:45Brisbane
44h 44m
2 stops
STL15:29Lambert-St Louis
$1,695
Find similar

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 4 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

Sat 22/11

16:43-08:45

2 stops24h 02m

Brisbane

Fri 26/12

10:45-15:29

2 stops44h 44m

$1,497

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 18/2

14:45-08:45

2 stops26h 00m

Brisbane

Tue 24/2

06:05-15:29

3 stops49h 24m

$1,533

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 25/1

08:45-08:45

2 stops32h 00m

Brisbane

Sun 8/3

10:45-14:29

2 stops43h 44m

$1,546

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 14/11

07:00-05:00

1 stop30h 00m

Brisbane

Mon 24/11

09:40-12:37

1 stop18h 57m

$1,648

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 14/11

11:42-05:00

2 stops25h 18m

Brisbane

Mon 24/11

09:40-16:27

1 stop22h 47m

$1,655

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 29/1

07:04-09:00

1 stop32h 56m

Sydney Kingsford Smith

Wed 18/2

07:05-23:48

2 stops33h 43m

$1,662

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 14/11

12:31-07:30

2 stops26h 59m

Brisbane

Mon 24/11

11:40-16:28

2 stops20h 48m

$1,679

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 22/11

17:29-07:30

1 stop22h 01m

Brisbane

Fri 26/12

11:40-22:30

1 stop26h 50m

$1,748

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 25/1

07:04-09:00

1 stop32h 56m

Sydney Kingsford Smith

Sun 1/2

19:15-16:14

2 stops37h 59m

$1,771

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 11/4

18:00-11:45

2 stops26h 45m

Sydney Kingsford Smith

Sat 25/4

13:15-22:29

2 stops24h 14m

$2,006

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 $2,046.

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 $1,926. 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 $2,711. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Australia?

You are more likely to see cheaper flights to Australia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $2,234 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from St. Louis for as low as $1,397 on momondo.

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.
Search flight deals

  • 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 $2,018Free cancellationRating
7.4
9,002 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.

An easier way to manage your Australia trip

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