What is the cheapest airline that flies from Lambert-St Louis to Australia?

United Airlines, Air Canada, and Qantas Airways are the most popular carriers operating from Lambert-St Louis to Australia

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?

As of December 2025, there is 1 operator available to choose from 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.

$895 Cheap Flights from St. Louis to Australia in 2025/26

1 adult

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Find the cheapest flights from St. Louis to Australia

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:04 - 20:50

STL

SYD

44h 46m2 stops

11:20 - 23:59

SYD

STL

29h 39m1 stop

$1,420Qantas Airways

Wed, 4 Feb - Wed, 11 Feb

14:40 - 07:05

STL

BNE

25h 25m2 stops

10:00 - 15:24

BNE

STL

44h 24m2 stops

$1,462Multiple Airlines

Mon, 13 Apr - Tue, 21 Apr

16:05 - 11:30

STL

BNE

52h 25m3 stops

10:00 - 15:24

BNE

STL

44h 24m2 stops

$1,500Air Canada

Mon, 13 Apr - Tue, 21 Apr

07:04 - 05:00

STL

BNE

29h 56m1 stop

18:30 - 16:14

BNE

STL

37h 44m2 stops

$1,512Qantas Airways

Sat, 31 Jan - Wed, 4 Feb

11:55 - 06:30

STL

BNE

26h 35m1 stop

19:40 - 23:59

BNE

STL

20h 19m1 stop

$1,531American Airlines

Mon, 2 Feb - Mon, 9 Feb

15:37 - 06:30

STL

BNE

22h 53m1 stop

19:40 - 23:59

BNE

STL

20h 19m1 stop

$1,533American Airlines

Mon, 2 Feb - Mon, 9 Feb

16:05 - 08:45

STL

BNE

24h 40m2 stops

14:05 - 15:29

BNE

STL

65h 24m3 stops

$1,553Air Canada

Mon, 2 Feb - Mon, 9 Feb

17:00 - 07:30

STL

BNE

22h 30m1 stop

11:40 - 15:37

BNE

STL

19h 57m1 stop

$1,569United Airlines

Sat, 31 Jan - Wed, 4 Feb

17:00 - 07:30

STL

BNE

22h 30m1 stop

11:40 - 15:37

BNE

STL

19h 57m1 stop

$1,571United Airlines

Sat, 31 Jan - Wed, 4 Feb

12:23 - 08:50

STL

MEL

28h 27m2 stops

10:00 - 23:01

MEL

STL

28h 01m2 stops

$1,840Delta

Fri, 3 Apr - Sun, 19 Apr

Qantas Airways flights from St. Louis to Australia

Our best Qantas Airways deals on St. Louis to Australia flight tickets

Qantas Airways

4 Feb

STL07:04Lambert-St Louis

44h 46m

2 stops

SYD20:50Sydney Kingsford Smith

11 Feb

SYD11:20Sydney Kingsford Smith

29h 39m

1 stop

STL23:59Lambert-St Louis

$1,420

Find similar

Qantas Airways

31 Jan

STL07:04Lambert-St Louis

29h 56m

1 stop

BNE05:00Brisbane

4 Feb

BNE18:30Brisbane

36h 17m

2 stops

STL14:47Lambert-St Louis

$1,512

Find similar

Qantas Airways

7 Mar

STL17:55Lambert-St Louis

44h 40m

2 stops

SYD07:35Sydney Kingsford Smith

14 Mar

SYD11:20Sydney Kingsford Smith

28h 39m

1 stop

STL23:59Lambert-St Louis

$1,518

Find similar

Air Canada flights from St. Louis to Australia

Our best Air Canada deals on St. Louis to Australia flight tickets

Air Canada

13 Apr

STL16:05Lambert-St Louis

52h 25m

3 stops

BNE11:30Brisbane

21 Apr

BNE10:00Brisbane

44h 24m

2 stops

STL15:24Lambert-St Louis

$1,500

Find similar

Air Canada

2 Feb

STL16:05Lambert-St Louis

24h 40m

2 stops

BNE08:45Brisbane

9 Feb

BNE14:05Brisbane

65h 24m

3 stops

STL15:29Lambert-St Louis

$1,553

Find similar

Air Canada

31 Jan

STL16:05Lambert-St Louis

48h 40m

2 stops

BNE08:45Brisbane

4 Feb

BNE10:45Brisbane

44h 44m

2 stops

STL15:29Lambert-St Louis

$1,572

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 4/2

07:04-20:50

2 stops44h 46m

Sydney Kingsford Smith

Wed 11/2

11:20-23:59

1 stop29h 39m

$1,420

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 13/4

14:40-07:05

2 stops25h 25m

Brisbane

Tue 21/4

10:00-15:24

2 stops44h 24m

$1,462

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 13/4

16:05-11:30

3 stops52h 25m

Brisbane

Tue 21/4

10:00-15:24

2 stops44h 24m

$1,500

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 31/1

07:04-05:00

1 stop29h 56m

Brisbane

Wed 4/2

18:30-16:14

2 stops37h 44m

$1,512

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 2/2

11:55-06:30

1 stop26h 35m

Brisbane

Mon 9/2

19:40-23:59

1 stop20h 19m

$1,531

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 2/2

15:37-06:30

1 stop22h 53m

Brisbane

Mon 9/2

19:40-23:59

1 stop20h 19m

$1,533

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 2/2

16:05-08:45

2 stops24h 40m

Brisbane

Mon 9/2

14:05-15:29

3 stops65h 24m

$1,553

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 31/1

17:00-07:30

1 stop22h 30m

Brisbane

Wed 4/2

11:40-15:37

1 stop19h 57m

$1,569

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 31/1

17:00-07:30

1 stop22h 30m

Brisbane

Wed 4/2

11:40-15:37

1 stop19h 57m

$1,571

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

12:23-08:50

2 stops28h 27m

Melbourne

Sun 19/4

10:00-23:01

2 stops28h 01m

$1,840

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $1,928. 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 $2,012.

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 $1,895. 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 $2,666. 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 $2,196 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 $1,433 on momondo.

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

You could potentially save up to 2% 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

Fastest flight time	21h 55m
Direct flights	None

The fastest flight from St. Louis to Australia takes 21h 55m

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?
As of December 2025, there is 1 operator available to choose from 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 Airlines	PriceFrom $2,139	Free cancellation	Rating 7.4 9,099 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.