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

Air Canada, American Airlines, 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 January 2026, 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.

$850 Cheap Flights from St. Louis to Australia in 2026

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.

18:50 - 17:15

STL

MEL

29h 25m

2 stops

12:00 - 23:59

MEL

STL

27h 59m

1 stop

$1,389Qantas Airways

Thu, 5 Mar - Thu, 12 Mar

06:38 - 07:35

STL

SYD

55h 57m

2 stops

11:20 - 23:59

SYD

STL

29h 39m

1 stop

$1,401Qantas Airways

Sat, 14 Feb - Sat, 21 Feb

14:45 - 08:45

STL

BNE

26h 00m

2 stops

10:45 - 16:59

BNE

STL

22h 14m

2 stops

$1,418Multiple Airlines

Fri, 27 Feb - Fri, 6 Mar

14:45 - 08:45

STL

BNE

26h 00m

2 stops

10:45 - 15:29

BNE

STL

44h 44m

2 stops

$1,422Multiple Airlines

Sun, 8 Feb - Sun, 15 Feb

16:05 - 08:45

STL

BNE

24h 40m

2 stops

10:45 - 15:29

BNE

STL

44h 44m

2 stops

$1,428Air Canada

Thu, 26 Feb - Thu, 5 Mar

16:05 - 08:45

STL

BNE

48h 40m

2 stops

10:45 - 15:29

BNE

STL

44h 44m

2 stops

$1,504Air Canada

Fri, 6 Feb - Fri, 13 Feb

18:11 - 12:40

STL

MEL

27h 29m

2 stops

09:45 - 23:59

MEL

STL

29h 14m

1 stop

$1,746American Airlines

Sun, 12 Apr - Sun, 26 Apr

17:20 - 10:05

STL

MEL

23h 45m

2 stops

12:00 - 21:12

MEL

STL

26h 12m

2 stops

$1,752American Airlines

Sun, 8 Feb - Sun, 15 Feb

17:25 - 18:00

STL

CBR

31h 35m

2 stops

06:30 - 16:44

CBR

STL

27h 14m

2 stops

$2,353United Airlines

Wed, 25 Feb - Wed, 4 Mar

17:00 - 18:00

STL

CBR

32h 00m

2 stops

06:30 - 15:37

CBR

STL

26h 07m

2 stops

$2,427United Airlines

Sat, 7 Feb - Tue, 10 Feb

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

5 Mar

STL18:50Lambert-St Louis

29h 25m

2 stops

MEL17:15Melbourne

12 Mar

MEL12:00Melbourne

27h 59m

1 stop

STL23:59Lambert-St Louis

$1,389

Qantas Airways

14 Feb

STL06:38Lambert-St Louis

55h 57m

2 stops

SYD07:35Sydney Kingsford Smith

21 Feb

SYD11:20Sydney Kingsford Smith

29h 39m

1 stop

STL23:59Lambert-St Louis

$1,401

Qantas Airways

18 Feb

STL06:38Lambert-St Louis

33h 52m

1 stop

MEL09:30Melbourne

24 Feb

MEL13:55Melbourne

42h 33m

2 stops

STL15:28Lambert-St Louis

$1,422

American Airlines flights from St. Louis to Australia

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

American Airlines

10 Feb

STL07:04Lambert-St Louis

29h 56m

1 stop

BNE05:00Brisbane

18 Feb

BNE09:40Brisbane

23h 33m

1 stop

STL17:13Lambert-St Louis

$1,707

American Airlines

10 Feb

STL14:38Lambert-St Louis

22h 22m

2 stops

BNE05:00Brisbane

18 Feb

BNE09:40Brisbane

21h 55m

2 stops

STL15:35Lambert-St Louis

$1,713

American Airlines

8 Feb

STL11:55Lambert-St Louis

26h 35m

1 stop

BNE06:30Brisbane

15 Feb

BNE09:40Brisbane

23h 40m

1 stop

STL17:20Lambert-St Louis

$1,717

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 5/3

18:50-17:15

2 stops29h 25m

Melbourne

Thu 12/3

12:00-23:59

1 stop27h 59m

$1,389

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 14/2

06:38-07:35

2 stops55h 57m

Sydney Kingsford Smith

Sat 21/2

11:20-23:59

1 stop29h 39m

$1,401

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 27/2

14:45-08:45

2 stops26h 00m

Brisbane

Fri 6/3

10:45-16:59

2 stops22h 14m

$1,418

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 8/2

14:45-08:45

2 stops26h 00m

Brisbane

Sun 15/2

10:45-15:29

2 stops44h 44m

$1,422

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 26/2

16:05-08:45

2 stops24h 40m

Brisbane

Thu 5/3

10:45-15:29

2 stops44h 44m

$1,428

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 6/2

16:05-08:45

2 stops48h 40m

Brisbane

Fri 13/2

10:45-15:29

2 stops44h 44m

$1,504

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 12/4

18:11-12:40

2 stops27h 29m

Melbourne

Sun 26/4

09:45-23:59

1 stop29h 14m

$1,746

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 8/2

17:20-10:05

2 stops23h 45m

Melbourne

Sun 15/2

12:00-21:12

2 stops26h 12m

$1,752

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Wed 25/2

17:25-18:00

2 stops31h 35m

Canberra

Wed 4/3

06:30-16:44

2 stops27h 14m

$2,353

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Sat 7/2

17:00-18:00

2 stops32h 00m

Canberra

Tue 10/2

06:30-15:37

2 stops26h 07m

$2,427

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 $1,796. If you don’t want to visit Australia in August, then you should wait until November to fly from St. Louis, when ticket prices are also cheap, with an average price of $2,004.

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 $2,140 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 $1,413 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 25m
Direct flights	None

The fastest flight from St. Louis to Australia takes 21h 25m

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 January 2026, 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 $2,109	Free cancellation	Rating 7.4 9,149 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.