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

Air Canada, United Airlines, 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.

$710 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

36h 37m

2 stops

11:20 - 23:58

SYD

STL

28h 38m

1 stop

$1,471Qantas Airways

Thu, 19 Mar - Wed, 25 Mar

13:00 - 07:05

STL

BNE

51h 05m

2 stops

10:00 - 20:05

BNE

STL

25h 05m

2 stops

$1,495Air Canada

Sat, 23 May - Tue, 9 Jun

13:00 - 07:05

STL

BNE

51h 05m

2 stops

10:00 - 12:06

BNE

STL

41h 06m

2 stops

$1,502Air Canada

Sat, 23 May - Mon, 8 Jun

16:05 - 12:05

STL

BNE

53h 00m

3 stops

10:00 - 16:56

BNE

STL

21h 56m

2 stops

$1,552Multiple Airlines

Wed, 8 Apr - Wed, 15 Apr

06:21 - 06:45

STL

MEL

33h 24m

1 stop

09:45 - 19:30

MEL

STL

24h 45m

2 stops

$1,574American Airlines

Tue, 7 Apr - Tue, 14 Apr

10:33 - 06:00

STL

MEL

27h 27m

2 stops

09:45 - 19:33

MEL

STL

24h 48m

2 stops

$1,593American Airlines

Fri, 3 Apr - Sun, 19 Apr

14:27 - 07:50

STL

MEL

26h 23m

2 stops

10:00 - 23:37

MEL

STL

28h 37m

2 stops

$1,600Delta

Wed, 13 May - Fri, 21 Aug

07:30 - 07:20

STL

SYD

32h 50m

1 stop

09:20 - 12:06

SYD

STL

41h 46m

1 stop

$1,610Multiple Airlines

Mon, 25 May - Sat, 6 Jun

06:29 - 07:00

STL

MEL

32h 31m

2 stops

09:10 - 16:32

MEL

STL

23h 22m

2 stops

$1,618Delta

Mon, 9 Mar - Sun, 22 Mar

16:47 - 07:00

STL

SYD

22h 13m

1 stop

11:50 - 16:05

SYD

STL

20h 15m

1 stop

$1,672United Airlines

Thu, 19 Mar - Wed, 25 Mar

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

19 Apr

STL10:09Lambert-St Louis

31h 36m

2 stops

SYD08:45Sydney Kingsford Smith

25 Apr

SYD19:20Sydney Kingsford Smith

42h 08m

2 stops

STL22:28Lambert-St Louis

$1,742

Air New Zealand

19 Apr

STL10:09Lambert-St Louis

31h 36m

2 stops

SYD08:45Sydney Kingsford Smith

25 Apr

SYD19:20Sydney Kingsford Smith

49h 30m

2 stops

STL05:50Lambert-St Louis

$1,744

Air New Zealand

27 May

STL08:35Lambert-St Louis

35h 30m

2 stops

BNE11:05Brisbane

6 June

BNE09:35Brisbane

28h 10m

2 stops

STL22:45Lambert-St Louis

$1,792

Delta flights from St. Louis to Australia

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

Delta

13 May

STL09:13Lambert-St Louis

31h 37m

2 stops

MEL07:50Melbourne

19 Aug

MEL10:00Melbourne

23h 00m

2 stops

STL18:00Lambert-St Louis

$1,600

Delta

9 Mar

STL06:29Lambert-St Louis

32h 31m

2 stops

MEL07:00Melbourne

22 Mar

MEL09:10Melbourne

23h 22m

2 stops

STL16:32Lambert-St Louis

$1,618

Delta

4 May

STL13:02Lambert-St Louis

26h 48m

2 stops

SYD06:50Sydney Kingsford Smith

18 May

SYD09:15Sydney Kingsford Smith

27h 14m

2 stops

STL21:29Lambert-St Louis

$1,621

Fly from

Fly to

Route

Depart

Return

Price

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

$1,471

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

$1,495

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sat 23/5

13:00-07:05

2 stops51h 05m

Brisbane

Mon 8/6

10:00-12:06

2 stops41h 06m

$1,502

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 8/4

16:05-12:05

3 stops53h 00m

Brisbane

Wed 15/4

10:00-16:56

2 stops21h 56m

$1,552

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 7/4

06:21-06:45

1 stop33h 24m

Melbourne

Tue 14/4

09:45-19:30

2 stops24h 45m

$1,574

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

10:33-06:00

2 stops27h 27m

Melbourne

Sun 19/4

09:45-19:33

2 stops24h 48m

$1,593

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Wed 13/5

14:27-07:50

2 stops26h 23m

Melbourne

Fri 21/8

10:00-23:37

2 stops28h 37m

$1,600

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 25/5

07:30-07:20

1 stop32h 50m

Sydney Kingsford Smith

Sat 6/6

09:20-12:06

1 stop41h 46m

$1,610

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 9/3

06:29-07:00

2 stops32h 31m

Melbourne

Sun 22/3

09:10-16:32

2 stops23h 22m

$1,618

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 19/3

16:47-07:00

1 stop22h 13m

Sydney Kingsford Smith

Wed 25/3

11:50-16:05

1 stop20h 15m

$1,672

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 $1,799. 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 $1,833.

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 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 $1,996	Free cancellation	Rating 7.4 9,342 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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