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

Air Canada and United Airlines 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.

$1,000 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 - 09:00

STL

SYD

32h 56m1 stop

07:05 - 23:48

SYD

STL

33h 43m2 stops

$1,369Qantas Airways

Sun, 8 Feb - Sun, 15 Feb

06:38 - 05:00

STL

BNE

30h 22m1 stop

18:30 - 15:28

BNE

STL

36h 58m2 stops

$1,396Qantas Airways

Thu, 12 Feb - Thu, 19 Feb

17:25 - 07:30

STL

BNE

22h 05m1 stop

11:40 - 16:44

BNE

STL

21h 04m1 stop

$1,551United Airlines

Thu, 12 Feb - Thu, 19 Feb

14:45 - 07:30

STL

BNE

24h 45m2 stops

11:40 - 22:14

BNE

STL

26h 34m3 stops

$1,557United Airlines

Thu, 12 Feb - Thu, 19 Feb

16:05 - 09:35

STL

SYD

48h 30m2 stops

11:20 - 15:29

SYD

STL

45h 09m2 stops

$1,711Air Canada

Tue, 10 Feb - Tue, 17 Feb

17:59 - 07:00

STL

MEL

45h 01m2 stops

09:10 - 17:05

MEL

STL

23h 55m2 stops

$1,744Delta

Sun, 8 Mar - Wed, 18 Mar

12:28 - 08:50

STL

MEL

28h 22m2 stops

10:00 - 23:12

MEL

STL

28h 12m2 stops

$1,819Delta

Fri, 3 Apr - Sun, 19 Apr

16:05 - 08:45

STL

BNE

48h 40m2 stops

10:45 - 15:29

BNE

STL

44h 44m2 stops

$1,880Air Canada

Sat, 17 Jan - Mon, 9 Feb

16:05 - 14:20

STL

BNE

54h 15m3 stops

10:45 - 15:29

BNE

STL

44h 44m2 stops

$1,896Multiple Airlines

Sat, 17 Jan - Mon, 9 Feb

16:05 - 13:25

STL

BNE

53h 20m3 stops

06:10 - 15:29

BNE

STL

49h 19m3 stops

$1,920Multiple Airlines

Fri, 16 Jan - Mon, 2 Feb

American Airlines flights from St. Louis to Australia

Our best American Airlines deals on St. Louis to Australia flight tickets

American Airlines

5 June

STL14:11Lambert-St Louis

25h 54m

2 stops

SYD07:05Sydney Kingsford Smith

13 June

SYD12:00Sydney Kingsford Smith

23h 26m

2 stops

STL20:26Lambert-St Louis

$2,166

Find similar

American Airlines

31 Dec

STL06:20Lambert-St Louis

34h 10m

1 stop

MEL09:30Melbourne

14 Jan

MEL12:00Melbourne

28h 59m

1 stop

STL23:59Lambert-St Louis

$3,318

Find similar

American Airlines

31 Dec

STL06:20Lambert-St Louis

34h 10m

1 stop

MEL09:30Melbourne

14 Jan

MEL12:00Melbourne

28h 59m

1 stop

STL23:59Lambert-St Louis

$3,330

Find similar

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

27 Jan

STL07:04Lambert-St Louis

32h 56m

1 stop

SYD09:00Sydney Kingsford Smith

3 Feb

SYD07:05Sydney Kingsford Smith

33h 54m

2 stops

STL23:59Lambert-St Louis

$1,369

Find similar

Qantas Airways

12 Feb

STL06:38Lambert-St Louis

30h 22m

1 stop

BNE05:00Brisbane

19 Feb

BNE18:30Brisbane

36h 58m

2 stops

STL15:28Lambert-St Louis

$1,396

Find similar

Qantas Airways

9 Mar

STL18:50Lambert-St Louis

34h 00m

2 stops

SYD20:50Sydney Kingsford Smith

16 Mar

SYD11:20Sydney Kingsford Smith

28h 39m

1 stop

STL23:59Lambert-St Louis

$1,402

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 8/2

07:04-09:00

1 stop32h 56m

Sydney Kingsford Smith

Sun 15/2

07:05-23:48

2 stops33h 43m

$1,369

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 12/2

06:38-05:00

1 stop30h 22m

Brisbane

Thu 19/2

18:30-15:28

2 stops36h 58m

$1,396

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 12/2

17:25-07:30

1 stop22h 05m

Brisbane

Thu 19/2

11:40-16:44

1 stop21h 04m

$1,551

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 12/2

14:45-07:30

2 stops24h 45m

Brisbane

Thu 19/2

11:40-22:14

3 stops26h 34m

$1,557

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 10/2

16:05-09:35

2 stops48h 30m

Sydney Kingsford Smith

Tue 17/2

11:20-15:29

2 stops45h 09m

$1,711

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 8/3

17:59-07:00

2 stops45h 01m

Melbourne

Wed 18/3

09:10-17:05

2 stops23h 55m

$1,744

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

12:28-08:50

2 stops28h 22m

Melbourne

Sun 19/4

10:00-23:12

2 stops28h 12m

$1,819

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 17/1

16:05-08:45

2 stops48h 40m

Brisbane

Mon 9/2

10:45-15:29

2 stops44h 44m

$1,880

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 17/1

16:05-14:20

3 stops54h 15m

Brisbane

Mon 9/2

10:45-15:29

2 stops44h 44m

$1,896

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 16/1

16:05-13:25

3 stops53h 20m

Brisbane

Mon 2/2

06:10-15:29

3 stops49h 19m

$1,920

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 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 $1,902. 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 $1,986.

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 $2,167 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 $1,414 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	24h 00m
Direct flights	None

The fastest flight from St. Louis to Australia takes 24h 00m

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 $2,111	Free cancellation	Rating 7.4 9,121 reviews		Search United Airlines flights

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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.