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

American Airlines, Air Canada, and Qantas Airways 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 February 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.

$690 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.

16:13 - 20:50

STL

SYD

35h 37m

2 stops

11:20 - 23:58

SYD

STL

28h 38m

1 stop

$1,262Qantas Airways

Tue, 3 Mar - Tue, 10 Mar

16:13 - 20:50

STL

SYD

36h 37m

2 stops

11:20 - 23:58

SYD

STL

28h 38m

1 stop

$1,263Qantas Airways

Thu, 19 Mar - Wed, 25 Mar

16:05 - 07:45

STL

BNE

48h 40m

2 stops

10:00 - 16:56

BNE

STL

21h 56m

2 stops

$1,350Multiple Airlines

Sun, 22 Mar - Wed, 29 Apr

13:00 - 07:05

STL

BNE

51h 05m

2 stops

10:00 - 20:05

BNE

STL

25h 05m

2 stops

$1,364Air Canada

Sat, 23 May - Tue, 9 Jun

16:05 - 13:30

STL

BNE

54h 25m

3 stops

10:00 - 16:56

BNE

STL

21h 56m

2 stops

$1,398Multiple Airlines

Sun, 22 Mar - Wed, 29 Apr

07:30 - 11:30

STL

BNE

37h 00m

3 stops

10:00 - 20:05

BNE

STL

25h 05m

2 stops

$1,466Air Canada

Sat, 23 May - Tue, 9 Jun

05:00 - 06:30

STL

BNE

34h 30m

2 stops

10:30 - 18:24

BNE

STL

22h 54m

1 stop

$1,651United Airlines

Sun, 22 Mar - Wed, 29 Apr

16:13 - 05:00

STL

MEL

20h 47m

1 stop

12:00 - 23:58

MEL

STL

27h 58m

1 stop

$1,785American Airlines

Mon, 9 Mar - Fri, 20 Mar

16:13 - 09:30

STL

MEL

25h 17m

2 stops

12:00 - 23:58

MEL

STL

27h 58m

1 stop

$1,789American Airlines

Thu, 12 Mar - Sat, 21 Mar

19:05 - 09:15

STL

MEL

22h 10m

1 stop

10:55 - 18:24

MEL

STL

22h 29m

1 stop

$1,817United Airlines

Fri, 3 Apr - Sun, 19 Apr

Air New Zealand flights from St. Louis to Australia

Our best Air New Zealand deals on St. Louis to Australia flight tickets

Air New Zealand

4 May

STL06:00Lambert-St Louis

35h 45m

2 stops

SYD08:45Sydney Kingsford Smith

18 May

SYD11:55Sydney Kingsford Smith

25h 35m

2 stops

STL22:30Lambert-St Louis

$1,733

Air New Zealand

4 May

STL06:00Lambert-St Louis

37h 40m

2 stops

SYD10:40Sydney Kingsford Smith

18 May

SYD11:55Sydney Kingsford Smith

32h 52m

2 stops

STL05:47Lambert-St Louis

$1,734

Air New Zealand

2 May

STL16:44Lambert-St Louis

26h 56m

2 stops

SYD10:40Sydney Kingsford Smith

16 May

SYD19:20Sydney Kingsford Smith

49h 27m

2 stops

STL05:47Lambert-St Louis

$1,816

American Airlines flights from St. Louis to Australia

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

American Airlines

13 Feb

STL18:50Lambert-St Louis

19h 40m

1 stop

BNE06:30Brisbane

20 Feb

BNE09:40Brisbane

21h 48m

1 stop

STL15:28Lambert-St Louis

$1,693

American Airlines

13 Feb

STL18:50Lambert-St Louis

19h 40m

1 stop

BNE06:30Brisbane

20 Feb

BNE09:40Brisbane

23h 33m

1 stop

STL17:13Lambert-St Louis

$1,695

American Airlines

13 Feb

STL18:50Lambert-St Louis

19h 40m

1 stop

BNE06:30Brisbane

20 Feb

BNE09:40Brisbane

23h 33m

1 stop

STL17:13Lambert-St Louis

$1,696

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 3/3

16:13-20:50

2 stops35h 37m

Sydney Kingsford Smith

Tue 10/3

11:20-23:58

1 stop28h 38m

$1,262

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 19/3

16:13-20:50

2 stops36h 37m

Sydney Kingsford Smith

Wed 25/3

11:20-23:58

1 stop28h 38m

$1,263

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 22/3

16:05-07:45

2 stops48h 40m

Brisbane

Wed 29/4

10:00-16:56

2 stops21h 56m

$1,350

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 23/5

13:00-07:05

2 stops51h 05m

Brisbane

Tue 9/6

10:00-20:05

2 stops25h 05m

$1,364

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 22/3

16:05-13:30

3 stops54h 25m

Brisbane

Wed 29/4

10:00-16:56

2 stops21h 56m

$1,398

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 23/5

07:30-11:30

3 stops37h 00m

Brisbane

Tue 9/6

10:00-20:05

2 stops25h 05m

$1,466

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 22/3

05:00-06:30

2 stops34h 30m

Brisbane

Wed 29/4

10:30-18:24

1 stop22h 54m

$1,651

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 9/3

16:13-05:00

1 stop20h 47m

Melbourne

Fri 20/3

12:00-23:58

1 stop27h 58m

$1,785

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 12/3

16:13-09:30

2 stops25h 17m

Melbourne

Sat 21/3

12:00-23:58

1 stop27h 58m

$1,789

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

19:05-09:15

1 stop22h 10m

Melbourne

Sun 19/4

10:55-18:24

1 stop22h 29m

$1,817

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 $1,792. If you don’t want to visit Australia in August, then you should wait until March to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,825.

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	19h 40m
Direct flights	None

The fastest flight from St. Louis to Australia takes 19h 40m

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 February 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 $1,988	Free cancellation	Rating 7.4 9,283 reviews		Search United Airlines flights

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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?

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