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Cheap flights from St. Louis to Australia from $812

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 15/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
13:35 - 08:45STL-BNE
51h 10m2 stops
Air Canada Logo
10:45 - 22:22BNE-STL
27h 37m2 stops
$1,683Air Canada
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Sat, 22 Nov - Fri, 26 Dec
American Airlines Logo
07:00 - 05:00STL-BNE
30h 00m1 stop
American Airlines Logo
19:40 - 23:51BNE-STL
20h 11m1 stop
$1,714American Airlines
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Sat, 22 Nov - Fri, 26 Dec
American Airlines Logo
11:42 - 05:00STL-BNE
25h 18m2 stops
American Airlines Logo
19:40 - 23:51BNE-STL
20h 11m1 stop
$1,722American Airlines
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Sat, 22 Nov - Fri, 26 Dec
Delta Logo
19:40 - 08:20STL-BNE
44h 40m2 stops
Delta Logo
11:05 - 00:46BNE-STL
29h 41m2 stops
$1,842Delta
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Sun, 2 Nov - Wed, 12 Nov
Fiji Airways Logo
17:49 - 12:30STL-SYD
25h 41m2 stops
Fiji Airways Logo
14:10 - 22:24SYD-STL
25h 14m2 stops
$1,844Fiji Airways
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Sat, 21 Feb - Tue, 3 Mar
Qantas Airways Logo
06:39 - 05:00STL-BNE
31h 21m1 stop
Qantas Airways Logo
19:40 - 23:42BNE-STL
20h 02m1 stop
$1,888Qantas Airways
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Fri, 31 Oct - Sun, 9 Nov
Delta Logo
10:30 - 07:20STL-BNE
29h 50m2 stops
Delta Logo
10:40 - 18:57BNE-STL
24h 17m2 stops
$1,919Delta
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Fri, 31 Oct - Sun, 9 Nov
Fiji Airways Logo
17:04 - 12:30STL-SYD
26h 26m2 stops
Fiji Airways Logo
14:10 - 22:24SYD-STL
25h 14m2 stops
$1,931Fiji Airways
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Thu, 5 Feb - Tue, 17 Feb
United Airlines Logo
17:30 - 10:00STL-MEL
23h 30m1 stop
United Airlines Logo
13:00 - 16:27MEL-STL
20h 27m1 stop
$1,976United Airlines
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Wed, 3 Dec - Wed, 10 Dec
United Airlines Logo
06:00 - 10:00STL-MEL
35h 00m2 stops
United Airlines Logo
13:00 - 21:13MEL-STL
25h 13m2 stops
$1,982United Airlines
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Sun, 4 Jan - Fri, 16 Jan

Fiji Airways flights from St. Louis to Australia

Our best Fiji Airways deals on St. Louis to Australia flight tickets
Fiji Airways
21 Feb
STL17:49Lambert-St Louis
25h 41m
2 stops
SYD12:30Sydney Kingsford Smith
3 Mar
SYD14:10Sydney Kingsford Smith
25h 14m
2 stops
STL22:24Lambert-St Louis
$1,844
Find similar
Fiji Airways
5 Feb
STL17:04Lambert-St Louis
26h 26m
2 stops
SYD12:30Sydney Kingsford Smith
17 Feb
SYD14:10Sydney Kingsford Smith
25h 14m
2 stops
STL22:24Lambert-St Louis
$1,931
Find similar
Fiji Airways
21 Feb
STL17:49Lambert-St Louis
35h 16m
2 stops
SYD22:05Sydney Kingsford Smith
2 Mar
SYD14:10Sydney Kingsford Smith
25h 58m
2 stops
STL23:08Lambert-St Louis
$2,077
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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
5 Dec
STL07:00Lambert-St Louis
43h 45m
2 stops
SYD19:45Sydney Kingsford Smith
9 Dec
SYD21:40Sydney Kingsford Smith
33h 47m
2 stops
STL14:27Lambert-St Louis
$1,968
Find similar
Alaska Airlines
5 Dec
STL07:00Lambert-St Louis
43h 45m
2 stops
SYD19:45Sydney Kingsford Smith
13 Dec
SYD21:40Sydney Kingsford Smith
43h 19m
2 stops
STL23:59Lambert-St Louis
$2,014
Find similar
Alaska Airlines
5 Dec
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
$2,071
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 20 October 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

13:35-08:45

2 stops51h 10m

Brisbane

Fri 26/12

10:45-22:22

2 stops27h 37m

$1,683

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 22/11

07:00-05:00

1 stop30h 00m

Brisbane

Fri 26/12

19:40-23:51

1 stop20h 11m

$1,714

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 22/11

11:42-05:00

2 stops25h 18m

Brisbane

Fri 26/12

19:40-23:51

1 stop20h 11m

$1,722

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 2/11

19:40-08:20

2 stops44h 40m

Brisbane

Wed 12/11

11:05-00:46

2 stops29h 41m

$1,842

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 21/2

17:49-12:30

2 stops25h 41m

Sydney Kingsford Smith

Tue 3/3

14:10-22:24

2 stops25h 14m

$1,844

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 31/10

06:39-05:00

1 stop31h 21m

Brisbane

Sun 9/11

19:40-23:42

1 stop20h 02m

$1,888

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 31/10

10:30-07:20

2 stops29h 50m

Brisbane

Sun 9/11

10:40-18:57

2 stops24h 17m

$1,919

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 5/2

17:04-12:30

2 stops26h 26m

Sydney Kingsford Smith

Tue 17/2

14:10-22:24

2 stops25h 14m

$1,931

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 3/12

17:30-10:00

1 stop23h 30m

Melbourne

Wed 10/12

13:00-16:27

1 stop20h 27m

$1,976

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 4/1

06:00-10:00

2 stops35h 00m

Melbourne

Fri 16/1

13:00-21:13

2 stops25h 13m

$1,982

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 $1,948. 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 $2,048.

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 $1,929. 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 $2,714. 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 $2,246 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 $1,399 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 $2,020Free cancellationRating
7.4
8,994 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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