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Cheap flights from St. Louis to Australia from $878

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 17/2. 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

Air Canada Logo
16:43 - 07:45STL-BNE
24h 02m2 stops
Air Canada Logo
10:45 - 15:29BNE-STL
44h 44m2 stops
$1,534Air Canada
Find Deal
Fri, 31 Oct - Tue, 11 Nov
Qantas Airways Logo
18:13 - 06:30STL-BNE
20h 17m1 stop
Qantas Airways Logo
09:40 - 15:00BNE-STL
21h 20m1 stop
$1,565Qantas Airways
Find Deal
Sat, 22 Nov - Fri, 26 Dec
Logo
13:35 - 07:45STL-BNE
27h 10m2 stops
Logo
06:35 - 15:29BNE-STL
48h 54m3 stops
$1,611
Find Deal
Fri, 31 Oct - Tue, 11 Nov
United Airlines Logo
17:29 - 06:30STL-BNE
22h 01m1 stop
United Airlines Logo
11:40 - 16:27BNE-STL
20h 47m1 stop
$1,634United Airlines
Find Deal
Fri, 31 Oct - Tue, 11 Nov
United Airlines Logo
13:35 - 06:30STL-BNE
25h 55m2 stops
United Airlines Logo
11:40 - 16:27BNE-STL
20h 47m1 stop
$1,642United Airlines
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Fri, 31 Oct - Tue, 11 Nov
Fiji Airways Logo
17:58 - 12:30STL-SYD
25h 32m2 stops
Fiji Airways Logo
14:10 - 19:30SYD-STL
22h 20m2 stops
$1,648Fiji Airways
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Tue, 4 Nov - Tue, 11 Nov
Logo
17:09 - 19:20STL-MEL
34h 11m2 stops
Logo
07:30 - 20:53MEL-STL
29h 23m2 stops
$1,830
Find Deal
Sat, 11 Oct - Sat, 18 Oct
Air New Zealand Logo
06:00 - 08:45STL-SYD
33h 45m2 stops
Air New Zealand Logo
11:45 - 20:21SYD-STL
25h 36m2 stops
$1,858Air New Zealand
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Wed, 11 Feb - Wed, 25 Feb
Fiji Airways Logo
17:09 - 11:40STL-CNS
27h 31m2 stops
Fiji Airways Logo
12:40 - 20:53CNS-STL
23h 13m2 stops
$1,904Fiji Airways
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Sat, 11 Oct - Sat, 18 Oct
Air New Zealand Logo
06:15 - 12:40STL-SYD
37h 25m2 stops
Air New Zealand Logo
11:45 - 16:27SYD-STL
45h 42m2 stops
$1,950Air New Zealand
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Fri, 28 Nov - Sun, 14 Dec

Fiji Airways flights from St. Louis to Australia

Our best Fiji Airways deals on St. Louis to Australia flight tickets
Fiji Airways
4 Nov
STL17:58Lambert-St Louis
25h 32m
2 stops
SYD12:30Sydney Kingsford Smith
11 Nov
SYD14:10Sydney Kingsford Smith
22h 20m
2 stops
STL19:30Lambert-St Louis
$1,648
Find similar
Fiji Airways
11 Oct
STL17:09Lambert-St Louis
27h 31m
2 stops
CNS11:40Cairns
18 Oct
CNS12:40Cairns
23h 13m
2 stops
STL20:53Lambert-St Louis
$1,904
Find similar
Fiji Airways
13 Nov
STL18:13Lambert-St Louis
25h 22m
2 stops
CNS11:35Cairns
17 Nov
CNS12:35Cairns
27h 07m
2 stops
STL23:42Lambert-St Louis
$1,971
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Air Canada flights from St. Louis to Australia

Our best Air Canada deals on St. Louis to Australia flight tickets
Air Canada
31 Oct
STL16:43Lambert-St Louis
24h 02m
2 stops
BNE07:45Brisbane
11 Nov
BNE10:45Brisbane
44h 44m
2 stops
STL15:29Lambert-St Louis
$1,534
Find similar
Air Canada
31 Aug
STL05:15Lambert-St Louis
35h 05m
2 stops
SYD07:20Sydney Kingsford Smith
13 Sept
SYD09:20Sydney Kingsford Smith
22h 13m
2 stops
STL16:33Lambert-St Louis
$1,792
Find similar
Air Canada
9 Sept
STL09:15Lambert-St Louis
31h 05m
2 stops
SYD07:20Sydney Kingsford Smith
12 Sept
SYD09:20Sydney Kingsford Smith
49h 37m
2 stops
STL19:57Lambert-St Louis
$1,796
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 29 August 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

Fri 31/10

16:43-07:45

2 stops24h 02m

Brisbane

Tue 11/11

10:45-15:29

2 stops44h 44m

$1,534

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

$1,565

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 31/10

13:35-07:45

2 stops27h 10m

Brisbane

Tue 11/11

06:35-15:29

3 stops48h 54m

$1,611

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 31/10

17:29-06:30

1 stop22h 01m

Brisbane

Tue 11/11

11:40-16:27

1 stop20h 47m

$1,634

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 31/10

13:35-06:30

2 stops25h 55m

Brisbane

Tue 11/11

11:40-16:27

1 stop20h 47m

$1,642

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 4/11

17:58-12:30

2 stops25h 32m

Sydney Kingsford Smith

Tue 11/11

14:10-19:30

2 stops22h 20m

$1,648

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 11/10

17:09-19:20

2 stops34h 11m

Melbourne

Sat 18/10

07:30-20:53

2 stops29h 23m

$1,830

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 11/2

06:00-08:45

2 stops33h 45m

Sydney Kingsford Smith

Wed 25/2

11:45-20:21

2 stops25h 36m

$1,858

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

Sat 11/10

17:09-11:40

2 stops27h 31m

Cairns

Sat 18/10

12:40-20:53

2 stops23h 13m

$1,904

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Fri 28/11

06:15-12:40

2 stops37h 25m

Sydney Kingsford Smith

Sun 14/12

11:45-16:27

2 stops45h 42m

$1,950

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 $1,941. 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 $2,085.

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 $1,921. 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 $2,703. 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 $2,240 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 $1,950 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 $2,013Free cancellationRating
7.4
8,941 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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