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

American Airlines, Qantas Airways, 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 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.

$762 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.

12:43 - 06:45

STL

MEL

26h 02m

2 stops

12:00 - 23:29

MEL

STL

27h 29m

1 stop

$1,763American Airlines

Sun, 18 Oct - Sun, 1 Nov

06:30 - 06:45

STL

MEL

32h 15m

1 stop

12:00 - 17:40

MEL

STL

21h 40m

1 stop

$1,766Qantas Airways

Sun, 18 Oct - Sun, 1 Nov

06:30 - 06:45

STL

MEL

32h 15m

1 stop

12:00 - 23:29

MEL

STL

27h 29m

1 stop

$1,770American Airlines

Sun, 18 Oct - Sun, 1 Nov

19:23 - 08:15

STL

MEL

21h 52m

1 stop

09:30 - 20:42

MEL

STL

26h 12m

2 stops

$1,778United Airlines

Fri, 12 Jun - Fri, 19 Jun

19:23 - 06:55

STL

SYD

20h 32m

1 stop

10:20 - 18:17

SYD

STL

22h 57m

1 stop

$1,809United Airlines

Mon, 1 Jun - Wed, 10 Jun

12:10 - 08:20

STL

SYD

28h 10m

2 stops

11:20 - 15:30

SYD

STL

45h 10m

2 stops

$1,977Air Canada

Tue, 13 Oct - Wed, 18 Nov

06:02 - 18:35

STL

PER

47h 33m

2 stops

22:45 - 23:59

PER

STL

38h 14m

2 stops

$2,142Qatar Airways

Tue, 18 Aug - Sun, 20 Sep

10:49 - 07:50

STL

MEL

30h 01m

2 stops

10:00 - 22:18

MEL

STL

27h 18m

2 stops

$2,184Delta

Mon, 1 Jun - Sun, 7 Jun

06:02 - 18:35

STL

PER

47h 33m

2 stops

22:45 - 23:59

PER

STL

38h 14m

2 stops

$2,197Qatar Airways

Tue, 18 Aug - Sun, 20 Sep

14:15 - 10:50

STL

CBR

29h 35m

3 stops

18:40 - 20:09

CBR

STL

40h 29m

3 stops

$5,320Air Canada

Sat, 23 May - Tue, 26 May

Delta flights from St. Louis to Australia

Our best Delta deals on St. Louis to Australia flight tickets

Delta

4 May

STL11:42Lambert-St Louis

28h 08m

2 stops

SYD06:50Sydney Kingsford Smith

18 May

SYD09:15Sydney Kingsford Smith

24h 48m

2 stops

STL19:03Lambert-St Louis

$1,815

Delta

13 Oct

STL13:30Lambert-St Louis

26h 20m

2 stops

SYD07:50Sydney Kingsford Smith

18 Nov

SYD10:40Sydney Kingsford Smith

29h 38m

2 stops

STL23:18Lambert-St Louis

$2,031

Delta

13 Oct

STL15:42Lambert-St Louis

24h 08m

2 stops

SYD07:50Sydney Kingsford Smith

18 Nov

SYD10:40Sydney Kingsford Smith

27h 09m

2 stops

STL20:49Lambert-St Louis

$2,032

ANA flights from St. Louis to Australia

Our best ANA deals on St. Louis to Australia flight tickets

ANA

13 Oct

STL06:15Lambert-St Louis

45h 55m

2 stops

SYD20:10Sydney Kingsford Smith

13 Nov

SYD21:45Sydney Kingsford Smith

31h 35m

2 stops

STL12:20Lambert-St Louis

$2,098

ANA

7 Sept

STL13:18Lambert-St Louis

29h 07m

2 stops

SYD09:25Sydney Kingsford Smith

14 Sept

SYD20:55Sydney Kingsford Smith

32h 13m

2 stops

STL14:08Lambert-St Louis

$2,139

ANA

7 Sept

STL09:16Lambert-St Louis

33h 09m

2 stops

SYD09:25Sydney Kingsford Smith

14 Sept

SYD20:55Sydney Kingsford Smith

32h 13m

2 stops

STL14:08Lambert-St Louis

$2,145

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 18/10

12:43-06:45

2 stops26h 02m

Melbourne

Sun 1/11

12:00-23:29

1 stop27h 29m

$1,763

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 18/10

06:30-06:45

1 stop32h 15m

Melbourne

Sun 1/11

12:00-17:40

1 stop21h 40m

$1,766

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 18/10

06:30-06:45

1 stop32h 15m

Melbourne

Sun 1/11

12:00-23:29

1 stop27h 29m

$1,770

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 12/6

19:23-08:15

1 stop21h 52m

Melbourne

Fri 19/6

09:30-20:42

2 stops26h 12m

$1,778

Fastest return journey

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 1/6

19:23-06:55

1 stop20h 32m

Sydney Kingsford Smith

Wed 10/6

10:20-18:17

1 stop22h 57m

$1,809

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 13/10

12:10-08:20

2 stops28h 10m

Sydney Kingsford Smith

Wed 18/11

11:20-15:30

2 stops45h 10m

$1,977

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 18/8

06:02-18:35

2 stops47h 33m

Perth

Sun 20/9

22:45-23:59

2 stops38h 14m

$2,142

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 1/6

10:49-07:50

2 stops30h 01m

Melbourne

Sun 7/6

10:00-22:18

2 stops27h 18m

$2,184

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 18/8

06:02-18:35

2 stops47h 33m

Perth

Sun 20/9

22:45-23:59

2 stops38h 14m

$2,197

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Sat 23/5

14:15-10:50

3 stops29h 35m

Canberra

Tue 26/5

18:40-20:09

3 stops40h 29m

$5,320

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 $430. 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 $706.

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.