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

Delta, United Airlines, and American 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 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.

$769 Cheap Flights from St. Louis to Australia in 2026

Find the cheapest flights from St. Louis to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:00 - 07:30

STL

SYD

34h 30m

1 stop

09:10 - 22:59

SYD

STL

28h 49m

1 stop

$1,667Qantas Airways

Mon, 10 Aug - Mon, 17 Aug

08:42 - 06:55

STL

SYD

31h 13m

1 stop

10:20 - 18:39

SYD

STL

23h 19m

1 stop

$1,705Air New Zealand

Wed, 12 Aug - Wed, 19 Aug

19:23 - 06:55

STL

SYD

20h 32m

1 stop

10:20 - 18:39

SYD

STL

23h 19m

1 stop

$1,721United Airlines

Mon, 10 Aug - Wed, 19 Aug

13:38 - 07:00

STL

SYD

26h 22m

2 stops

10:20 - 18:39

SYD

STL

23h 19m

1 stop

$1,727United Airlines

Mon, 10 Aug - Mon, 17 Aug

12:45 - 06:45

STL

MEL

27h 00m

2 stops

09:45 - 22:59

MEL

STL

28h 14m

1 stop

$1,730American Airlines

Sat, 15 Aug - Sat, 29 Aug

06:00 - 07:05

STL

SYD

34h 05m

1 stop

09:10 - 18:05

SYD

STL

23h 55m

2 stops

$1,734American Airlines

Mon, 10 Aug - Mon, 17 Aug

12:10 - 07:05

STL

BNE

51h 55m

2 stops

10:00 - 12:40

BNE

STL

41h 40m

2 stops

$2,020Air Canada

Mon, 3 Aug - Mon, 31 Aug

12:10 - 07:05

STL

BNE

27h 55m

2 stops

10:15 - 18:42

BNE

STL

47h 27m

2 stops

$2,028Air Canada

Tue, 28 Jul - Tue, 4 Aug

13:36 - 10:55

STL

MEL

29h 19m

3 stops

12:10 - 22:20

MEL

STL

27h 10m

2 stops

$2,050Multiple Airlines

Tue, 20 Oct - Tue, 3 Nov

16:48 - 07:05

STL

BNE

23h 17m

2 stops

17:55 - 20:24

BNE

STL

41h 29m

3 stops

$2,073Multiple Airlines

Tue, 28 Jul - Tue, 4 Aug

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Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

10 Aug

STL06:00Lambert-St Louis

34h 30m

1 stop

SYD07:30Sydney Kingsford Smith

17 Aug

SYD09:10Sydney Kingsford Smith

28h 49m

1 stop

STL22:59Lambert-St Louis

$1,667

Qantas Airways

31 Aug

STL06:00Lambert-St Louis

34h 05m

1 stop

SYD07:05Sydney Kingsford Smith

14 Sept

SYD09:10Sydney Kingsford Smith

29h 30m

1 stop

STL23:40Lambert-St Louis

$1,772

Qantas Airways

9 Aug

STL06:00Lambert-St Louis

34h 30m

1 stop

SYD07:30Sydney Kingsford Smith

16 Aug

SYD09:10Sydney Kingsford Smith

28h 49m

1 stop

STL22:59Lambert-St Louis

$1,786

American Airlines flights from St. Louis to Australia

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

American Airlines

15 Aug

STL12:45Lambert-St Louis

27h 00m

2 stops

MEL06:45Melbourne

29 Aug

MEL09:45Melbourne

28h 14m

1 stop

STL22:59Lambert-St Louis

$1,730

American Airlines

10 Aug

STL06:00Lambert-St Louis

34h 05m

1 stop

SYD07:05Sydney Kingsford Smith

17 Aug

SYD09:10Sydney Kingsford Smith

23h 55m

2 stops

STL18:05Lambert-St Louis

$1,734

American Airlines

15 Aug

STL06:00Lambert-St Louis

33h 45m

1 stop

MEL06:45Melbourne

29 Aug

MEL09:45Melbourne

28h 14m

1 stop

STL22:59Lambert-St Louis

$1,737

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 10/8

06:00-07:30

1 stop34h 30m

Sydney Kingsford Smith

Mon 17/8

09:10-22:59

1 stop28h 49m

$1,667

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 12/8

08:42-06:55

1 stop31h 13m

Sydney Kingsford Smith

Wed 19/8

10:20-18:39

1 stop23h 19m

$1,705

Fastest return journey

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 10/8

19:23-06:55

1 stop20h 32m

Sydney Kingsford Smith

Wed 19/8

10:20-18:39

1 stop23h 19m

$1,721

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 10/8

13:38-07:00

2 stops26h 22m

Sydney Kingsford Smith

Mon 17/8

10:20-18:39

1 stop23h 19m

$1,727

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 15/8

12:45-06:45

2 stops27h 00m

Melbourne

Sat 29/8

09:45-22:59

1 stop28h 14m

$1,730

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 10/8

06:00-07:05

1 stop34h 05m

Sydney Kingsford Smith

Mon 17/8

09:10-18:05

2 stops23h 55m

$1,734

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 3/8

12:10-07:05

2 stops51h 55m

Brisbane

Mon 31/8

10:00-12:40

2 stops41h 40m

$2,020

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 28/7

12:10-07:05

2 stops27h 55m

Brisbane

Tue 4/8

10:15-18:42

2 stops47h 27m

$2,028

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 20/10

13:36-10:55

3 stops29h 19m

Melbourne

Tue 3/11

12:10-22:20

2 stops27h 10m

$2,050

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 28/7

16:48-07:05

2 stops23h 17m

Brisbane

Tue 4/8

17:55-20:24

3 stops41h 29m

$2,073

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, May 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 $450. If you don’t want to visit Australia in May, then you should wait until December to fly from St. Louis, when ticket prices are also cheap, with an average price of $739.

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	20h 31m
Direct flights	None

The fastest flight from St. Louis to Australia takes 20h 31m

There are no direct flights from St. Louis to Australia. There are no popular flight routes from St. Louis to Australia.

Search flight deals

Frequently asked questions about flying from 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 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.

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.