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

United Airlines, Air New Zealand, and Air Canada 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.

$991 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.

18:54 - 19:20

STL

MEL

33h 26m

2 stops

07:30 - 20:26

MEL

STL

27h 56m

2 stops

$1,773Multiple Airlines

Thu, 6 Aug - Sat, 15 Aug

06:01 - 08:15

STL

MEL

35h 14m

2 stops

10:55 - 18:24

MEL

STL

22h 29m

1 stop

$1,780United Airlines

Thu, 6 Aug - Sat, 15 Aug

10:50 - 06:50

STL

SYD

29h 00m

2 stops

09:15 - 21:09

SYD

STL

26h 54m

2 stops

$1,822Delta

Mon, 4 May - Mon, 18 May

18:11 - 06:55

STL

SYD

21h 44m

1 stop

12:00 - 17:21

SYD

STL

20h 21m

1 stop

$1,900Qantas Airways

Mon, 4 May - Mon, 18 May

13:19 - 06:55

STL

SYD

26h 36m

1 stop

12:00 - 16:33

SYD

STL

19h 33m

1 stop

$1,902Qantas Airways

Tue, 23 Jun - Tue, 30 Jun

06:02 - 18:35

STL

PER

47h 33m

2 stops

22:45 - 23:59

PER

STL

38h 14m

2 stops

$2,065Qatar Airways

Tue, 18 Aug - Mon, 21 Sep

10:51 - 07:50

STL

MEL

29h 59m

2 stops

10:00 - 18:59

MEL

STL

23h 59m

2 stops

$2,084Delta

Mon, 15 Jun - Fri, 24 Jul

06:02 - 18:35

STL

PER

47h 33m

2 stops

22:45 - 23:59

PER

STL

38h 14m

2 stops

$2,094Qatar Airways

Tue, 18 Aug - Mon, 21 Sep

09:41 - 05:00

STL

BNE

28h 19m

2 stops

20:35 - 08:33

BNE

STL

26h 58m

2 stops

$2,187American Airlines

Wed, 3 Jun - Wed, 10 Jun

06:36 - 05:00

STL

BNE

31h 24m

1 stop

20:35 - 08:05

BNE

STL

26h 30m

2 stops

$2,204American Airlines

Wed, 29 Jul - Mon, 10 Aug

Delta flights from St. Louis to Australia

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

Delta

4 May

STL10:50Lambert-St Louis

29h 00m

2 stops

SYD06:50Sydney Kingsford Smith

18 May

SYD09:15Sydney Kingsford Smith

26h 54m

2 stops

STL21:09Lambert-St Louis

$1,822

Delta

15 June

STL10:51Lambert-St Louis

29h 59m

2 stops

MEL07:50Melbourne

24 July

MEL10:00Melbourne

23h 59m

2 stops

STL18:59Lambert-St Louis

$2,084

Delta

16 June

STL19:52Lambert-St Louis

44h 58m

2 stops

MEL07:50Melbourne

19 July

MEL10:00Melbourne

23h 59m

2 stops

STL18:59Lambert-St Louis

$2,107

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

4 May

STL18:11Lambert-St Louis

21h 44m

1 stop

SYD06:55Sydney Kingsford Smith

18 May

SYD12:00Sydney Kingsford Smith

20h 21m

1 stop

STL17:21Lambert-St Louis

$1,900

Qantas Airways

23 June

STL13:19Lambert-St Louis

26h 36m

1 stop

SYD06:55Sydney Kingsford Smith

30 June

SYD12:00Sydney Kingsford Smith

19h 33m

1 stop

STL16:33Lambert-St Louis

$1,902

Qantas Airways

13 Oct

STL17:11Lambert-St Louis

21h 44m

1 stop

SYD06:55Sydney Kingsford Smith

18 Nov

SYD14:05Sydney Kingsford Smith

19h 35m

1 stop

STL16:40Lambert-St Louis

$1,927

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 6/8

18:54-19:20

2 stops33h 26m

Melbourne

Sat 15/8

07:30-20:26

2 stops27h 56m

$1,773

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 6/8

06:01-08:15

2 stops35h 14m

Melbourne

Sat 15/8

10:55-18:24

1 stop22h 29m

$1,780

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

10:50-06:50

2 stops29h 00m

Sydney Kingsford Smith

Mon 18/5

09:15-21:09

2 stops26h 54m

$1,822

Fastest return journey

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

18:11-06:55

1 stop21h 44m

Sydney Kingsford Smith

Mon 18/5

12:00-17:21

1 stop20h 21m

$1,900

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 23/6

13:19-06:55

1 stop26h 36m

Sydney Kingsford Smith

Tue 30/6

12:00-16:33

1 stop19h 33m

$1,902

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 18/8

06:02-18:35

2 stops47h 33m

Perth

Mon 21/9

22:45-23:59

2 stops38h 14m

$2,065

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 15/6

10:51-07:50

2 stops29h 59m

Melbourne

Fri 24/7

10:00-18:59

2 stops23h 59m

$2,084

St. LouisPerth

STL - PER

STLPER

Lambert-St Louis

Tue 18/8

06:02-18:35

2 stops47h 33m

Perth

Mon 21/9

22:45-23:59

2 stops38h 14m

$2,094

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 3/6

09:41-05:00

2 stops28h 19m

Brisbane

Wed 10/6

20:35-08:33

2 stops26h 58m

$2,187

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 29/7

06:36-05:00

1 stop31h 24m

Brisbane

Mon 10/8

20:35-08:05

2 stops26h 30m

$2,204

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, March 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 $1,719. If you don’t want to visit Australia in March, then you should wait until August to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,804.

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 04m
Direct flights	None

The fastest flight from St. Louis to Australia takes 20h 04m

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.