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

Air Canada, Singapore 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 many operators does momondo search for flights from Lambert-St Louis Airport to Australia?

As of March 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.

$725 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.

13:00 - 07:05

STL

BNE

51h 05m

2 stops

10:00 - 20:05

BNE

STL

25h 05m

2 stops

$1,262Air Canada

Mon, 25 May - Mon, 8 Jun

14:20 - 07:05

STL

BNE

25h 45m

2 stops

10:15 - 20:25

BNE

STL

25h 10m

2 stops

$1,278Air Canada

Fri, 22 May - Thu, 4 Jun

14:20 - 12:05

STL

BNE

30h 45m

3 stops

10:15 - 20:25

BNE

STL

25h 10m

2 stops

$1,367Multiple Airlines

Fri, 22 May - Thu, 4 Jun

14:37 - 05:00

STL

BNE

23h 23m

2 stops

20:35 - 08:24

BNE

STL

26h 49m

2 stops

$1,478American Airlines

Sun, 19 Apr - Sun, 26 Apr

06:36 - 05:00

STL

BNE

31h 24m

1 stop

20:35 - 08:33

BNE

STL

26h 58m

2 stops

$1,513American Airlines

Fri, 22 May - Thu, 4 Jun

17:41 - 06:30

STL

BNE

45h 49m

2 stops

10:30 - 18:17

BNE

STL

22h 47m

1 stop

$1,540United Airlines

Tue, 26 May - Tue, 9 Jun

06:21 - 14:15

STL

SYD

40h 54m

2 stops

12:00 - 19:30

SYD

STL

22h 30m

1 stop

$1,557Qantas Airways

Sun, 19 Apr - Sat, 25 Apr

06:30 - 09:20

STL

SYD

35h 50m

2 stops

12:00 - 16:51

SYD

STL

19h 51m

1 stop

$1,563Qantas Airways

Thu, 6 Aug - Thu, 13 Aug

16:49 - 08:30

STL

MEL

23h 41m

2 stops

10:55 - 20:54

MEL

STL

24h 59m

2 stops

$1,601United Airlines

Fri, 3 Apr - Sun, 19 Apr

14:20 - 12:05

STL

BNE

30h 45m

3 stops

20:45 - 12:06

BNE

STL

54h 21m

3 stops

$1,669Multiple Airlines

Fri, 22 May - Thu, 4 Jun

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

7 Mar

STL11:46Lambert-St Louis

26h 09m

1 stop

SYD06:55Sydney Kingsford Smith

14 Mar

SYD15:35Sydney Kingsford Smith

24h 23m

2 stops

STL23:58Lambert-St Louis

$1,549

Qantas Airways

19 Apr

STL06:21Lambert-St Louis

40h 54m

2 stops

SYD14:15Sydney Kingsford Smith

25 Apr

SYD12:00Sydney Kingsford Smith

22h 30m

1 stop

STL19:30Lambert-St Louis

$1,557

Qantas Airways

6 Aug

STL06:30Lambert-St Louis

35h 50m

2 stops

SYD09:20Sydney Kingsford Smith

13 Aug

SYD12:00Sydney Kingsford Smith

19h 51m

1 stop

STL16:51Lambert-St Louis

$1,563

Delta flights from St. Louis to Australia

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

Delta

4 May

STL09:59Lambert-St Louis

29h 51m

2 stops

SYD06:50Sydney Kingsford Smith

18 May

SYD09:15Sydney Kingsford Smith

24h 48m

2 stops

STL19:03Lambert-St Louis

$1,633

Delta

17 Apr

STL14:20Lambert-St Louis

26h 30m

2 stops

MEL07:50Melbourne

24 Apr

MEL10:00Melbourne

26h 19m

2 stops

STL21:19Lambert-St Louis

$1,682

Delta

17 Apr

STL07:00Lambert-St Louis

33h 50m

2 stops

MEL07:50Melbourne

24 Apr

MEL10:00Melbourne

26h 19m

2 stops

STL21:19Lambert-St Louis

$1,684

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 25/5

13:00-07:05

2 stops51h 05m

Brisbane

Mon 8/6

10:00-20:05

2 stops25h 05m

$1,262

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 22/5

14:20-07:05

2 stops25h 45m

Brisbane

Thu 4/6

10:15-20:25

2 stops25h 10m

$1,278

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 22/5

14:20-12:05

3 stops30h 45m

Brisbane

Thu 4/6

10:15-20:25

2 stops25h 10m

$1,367

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 19/4

14:37-05:00

2 stops23h 23m

Brisbane

Sun 26/4

20:35-08:24

2 stops26h 49m

$1,478

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 22/5

06:36-05:00

1 stop31h 24m

Brisbane

Thu 4/6

20:35-08:33

2 stops26h 58m

$1,513

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 26/5

17:41-06:30

2 stops45h 49m

Brisbane

Tue 9/6

10:30-18:17

1 stop22h 47m

$1,540

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 19/4

06:21-14:15

2 stops40h 54m

Sydney Kingsford Smith

Sat 25/4

12:00-19:30

1 stop22h 30m

$1,557

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 6/8

06:30-09:20

2 stops35h 50m

Sydney Kingsford Smith

Thu 13/8

12:00-16:51

1 stop19h 51m

$1,563

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

16:49-08:30

2 stops23h 41m

Melbourne

Sun 19/4

10:55-20:54

2 stops24h 59m

$1,601

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 22/5

14:20-12:05

3 stops30h 45m

Brisbane

Thu 4/6

20:45-12:06

3 stops54h 21m

$1,669

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 $1,810. 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 $1,844.

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 32m
Direct flights	None

The fastest flight from St. Louis to Australia takes 20h 32m

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 March 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 $2,008	Free cancellation	Rating 7.4 9,389 reviews		Search United Airlines flights

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Can I find flights from St. Louis to Australia with flexible booking policies on momondo?

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How can momondo help me find flights from St. Louis to Australia?

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