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Cheap flights from St. Louis to Australia from $879

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 13/11. 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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Find the cheapest flights from St. Louis to Australia

Cheap return flights

United Airlines Logo
13:35 - 07:30STL-BNE
25h 55m2 stops
United Airlines Logo
11:40 - 21:54BNE-STL
26h 14m2 stops
$1,486United Airlines
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Mon, 3 Nov - Wed, 19 Nov
United Airlines Logo
10:00 - 07:30STL-BNE
29h 30m2 stops
United Airlines Logo
11:40 - 16:27BNE-STL
20h 47m1 stop
$1,492United Airlines
Find Deal
Mon, 3 Nov - Wed, 19 Nov
Qantas Airways Logo
13:48 - 06:30STL-BNE
24h 42m1 stop
Qantas Airways Logo
09:40 - 13:58BNE-STL
20h 18m1 stop
$1,535Qantas Airways
Find Deal
Sat, 7 Feb - Sat, 21 Feb
Air Canada Logo
16:05 - 08:45STL-BNE
48h 40m2 stops
Air Canada Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,586Air Canada
Find Deal
Sat, 7 Feb - Sat, 21 Feb
Qantas Airways Logo
18:13 - 06:30STL-BNE
20h 17m1 stop
Qantas Airways Logo
09:40 - 15:00BNE-STL
21h 20m1 stop
$1,591Qantas Airways
Find Deal
Sat, 22 Nov - Fri, 26 Dec
Air Canada Logo
08:45 - 08:45STL-BNE
32h 00m2 stops
Air Canada Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,598Air Canada
Find Deal
Wed, 4 Feb - Sun, 22 Feb
Multiple Airlines Logo
16:05 - 13:25STL-BNE
53h 20m3 stops
Multiple Airlines Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,621Multiple Airlines
Find Deal
Sat, 7 Feb - Sat, 21 Feb
Multiple Airlines Logo
16:05 - 13:25STL-BNE
53h 20m3 stops
Multiple Airlines Logo
06:10 - 15:29BNE-STL
49h 19m3 stops
$1,654Multiple Airlines
Find Deal
Sat, 7 Feb - Sat, 21 Feb
Alaska Airlines Logo
14:55 - 19:45STL-SYD
35h 50m2 stops
Alaska Airlines Logo
21:40 - 13:52SYD-STL
33h 12m2 stops
$1,753Alaska Airlines
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Sun, 1 Feb - Sat, 14 Feb
Alaska Airlines Logo
16:14 - 19:45STL-SYD
35h 31m2 stops
Alaska Airlines Logo
21:40 - 15:18SYD-STL
34h 38m2 stops
$1,765Alaska Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov

Alaska Airlines flights from St. Louis to Australia

Our best Alaska Airlines deals on St. Louis to Australia flight tickets
Alaska Airlines
1 Feb
STL14:55Lambert-St Louis
35h 50m
2 stops
SYD19:45Sydney Kingsford Smith
14 Feb
SYD21:40Sydney Kingsford Smith
33h 12m
2 stops
STL13:52Lambert-St Louis
$1,753
Find similar
Alaska Airlines
30 Oct
STL16:14Lambert-St Louis
35h 31m
2 stops
SYD19:45Sydney Kingsford Smith
6 Nov
SYD21:40Sydney Kingsford Smith
34h 38m
2 stops
STL15:18Lambert-St Louis
$1,765
Find similar
Alaska Airlines
25 Nov
STL07:00Lambert-St Louis
43h 45m
2 stops
SYD19:45Sydney Kingsford Smith
11 Dec
SYD21:40Sydney Kingsford Smith
43h 19m
2 stops
STL23:59Lambert-St Louis
$1,769
Find similar

Qantas Airways flights from St. Louis to Australia

Our best Qantas Airways deals on St. Louis to Australia flight tickets
Qantas Airways
7 Feb
STL13:48Lambert-St Louis
24h 42m
1 stop
BNE06:30Brisbane
21 Feb
BNE09:40Brisbane
20h 18m
1 stop
STL13:58Lambert-St Louis
$1,535
Find similar
Qantas Airways
22 Nov
STL18:13Lambert-St Louis
20h 17m
1 stop
BNE06:30Brisbane
26 Dec
BNE09:40Brisbane
21h 20m
1 stop
STL15:00Lambert-St Louis
$1,591
Find similar
Qantas Airways
7 Feb
STL17:54Lambert-St Louis
20h 36m
1 stop
BNE06:30Brisbane
22 Feb
BNE09:40Brisbane
20h 18m
1 stop
STL13:58Lambert-St Louis
$1,613
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 16 September 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

Mon 3/11

13:35-07:30

2 stops25h 55m

Brisbane

Wed 19/11

11:40-21:54

2 stops26h 14m

$1,486

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 3/11

10:00-07:30

2 stops29h 30m

Brisbane

Wed 19/11

11:40-16:27

1 stop20h 47m

$1,492

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 7/2

13:48-06:30

1 stop24h 42m

Brisbane

Sat 21/2

09:40-13:58

1 stop20h 18m

$1,535

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 7/2

16:05-08:45

2 stops48h 40m

Brisbane

Sat 21/2

10:45-15:29

2 stops44h 44m

$1,586

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 22/11

18:13-06:30

1 stop20h 17m

Brisbane

Fri 26/12

09:40-15:00

1 stop21h 20m

$1,591

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 4/2

08:45-08:45

2 stops32h 00m

Brisbane

Sun 22/2

10:45-15:29

2 stops44h 44m

$1,598

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 7/2

16:05-13:25

3 stops53h 20m

Brisbane

Sat 21/2

10:45-15:29

2 stops44h 44m

$1,621

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 7/2

16:05-13:25

3 stops53h 20m

Brisbane

Sat 21/2

06:10-15:29

3 stops49h 19m

$1,654

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 1/2

14:55-19:45

2 stops35h 50m

Sydney Kingsford Smith

Sat 14/2

21:40-13:52

2 stops33h 12m

$1,753

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 30/10

16:14-19:45

2 stops35h 31m

Sydney Kingsford Smith

Thu 6/11

21:40-15:18

2 stops34h 38m

$1,765

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 $1,900. 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 $2,039.

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 $1,881. 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 $2,647. 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 $2,208 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 $1,943 on momondo.

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

You could potentially save up to 31% 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 $1,970Free cancellationRating
7.4
8,924 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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