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

United Airlines, Delta, and Cathay Pacific 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.

$1,051 Cheap Flights from St. Louis to Australia in 2026/27

Find the cheapest flights from St. Louis to Australia

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:32 - 05:00STL Lambert-St Louis-MEL Melbourne

25h 28m2 stops Chicago O'Hare Intl Dallas/Fort Worth

22:45 - 08:07MEL Melbourne-STL Lambert-St Louis

26h 22m2 stops Los Angeles Charlotte Douglas

$1,750American Airlines

Tue, 27 Oct - Wed, 11 Nov

08:48 - 06:45STL Lambert-St Louis-MEL Melbourne

29h 57m2 stops Dallas/Fort Worth Los Angeles

22:45 - 09:30MEL Melbourne-STL Lambert-St Louis

27h 45m2 stops Los Angeles Dallas/Fort Worth

$1,751American Airlines

Tue, 20 Oct - Tue, 3 Nov

06:04 - 06:45STL Lambert-St Louis-MEL Melbourne

32h 41m1 stop Los Angeles

12:00 - 23:33MEL Melbourne-STL Lambert-St Louis

28h 33m1 stop Dallas/Fort Worth

$1,757American Airlines

Tue, 20 Oct - Tue, 3 Nov

19:05 - 09:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

21h 15m1 stop San Francisco

09:15 - 16:50SYD Sydney Kingsford Smith-STL Lambert-St Louis

24h 35m1 stop Houston George Bush Intcntl

$1,770United Airlines

Sun, 1 Nov - Mon, 9 Nov

16:39 - 09:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 41m2 stops Denver Intl San Francisco

11:50 - 18:09SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 19m2 stops San Francisco Chicago O'Hare Intl

$1,776United Airlines

Sun, 1 Nov - Mon, 9 Nov

12:00 - 08:50STL Lambert-St Louis-MEL Melbourne

28h 50m2 stops Atlanta Hartsfield-Jackson Los Angeles

09:10 - 17:44MEL Melbourne-STL Lambert-St Louis

24h 34m2 stops Los Angeles Salt Lake City

$1,776Delta

Mon, 19 Oct - Mon, 26 Oct

14:22 - 07:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 58m2 stops Salt Lake City Los Angeles

10:40 - 23:56SYD Sydney Kingsford Smith-STL Lambert-St Louis

30h 16m2 stops Los Angeles Atlanta Hartsfield-Jackson

$1,777Delta

Sun, 25 Oct - Mon, 9 Nov

14:55 - 09:30STL Lambert-St Louis-MEL Melbourne

25h 35m2 stops Houston George Bush Intcntl Los Angeles

12:45 - 18:05MEL Melbourne-STL Lambert-St Louis

22h 20m1 stop San Francisco

$1,777United Airlines

Wed, 11 Nov - Wed, 18 Nov

13:29 - 09:15STL Lambert-St Louis-MEL Melbourne

27h 46m2 stops Chicago O'Hare Intl San Francisco

12:45 - 20:59MEL Melbourne-STL Lambert-St Louis

25h 14m2 stops San Francisco Denver Intl

$1,783United Airlines

Tue, 20 Oct - Tue, 3 Nov

15:11 - 09:15STL Lambert-St Louis-MEL Melbourne

26h 04m2 stops Chicago O'Hare Intl San Francisco

11:45 - 18:05MEL Melbourne-STL Lambert-St Louis

22h 20m1 stop San Francisco

$1,784United Airlines

Mon, 19 Oct - Mon, 26 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:30 - 22:40STL Lambert-St Louis-PER Perth

51h 10m2 stops Los Angeles Hong Kong Intl

00:10 - 23:44PER Perth-STL Lambert-St Louis

36h 34m2 stops Hong Kong Intl Seattle/Tacoma Intl

$2,206Multiple Airlines

Fri, 2 Oct - Mon, 29 Mar

06:00 - 22:40STL Lambert-St Louis-PER Perth

51h 40m2 stops Los Angeles Hong Kong Intl

08:20 - 23:44PER Perth-STL Lambert-St Louis

52h 24m2 stops Hong Kong Intl Seattle/Tacoma Intl

$2,243Cathay Pacific

Thu, 1 Oct - Tue, 30 Mar

06:00 - 08:40STL Lambert-St Louis-SYD Sydney Kingsford Smith

35h 40m2 stops Los Angeles Hong Kong Intl

08:40 - 23:42SYD Sydney Kingsford Smith-STL Lambert-St Louis

31h 02m2 stops Hong Kong Intl Dallas/Fort Worth

$2,315Multiple Airlines

Thu, 1 Oct - Thu, 8 Oct

15:12 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

24h 43m2 stops Houston George Bush Intcntl San Francisco

08:55 - 22:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 35m2 stops Auckland Intl Houston George Bush Intcntl

$2,519Air New Zealand

Thu, 1 Oct - Sat, 3 Oct

11:01 - 06:50STL Lambert-St Louis-PER Perth

30h 49m2 stops Chicago O'Hare Intl Hong Kong Intl

00:10 - 23:44PER Perth-STL Lambert-St Louis

36h 34m2 stops Hong Kong Intl Seattle/Tacoma Intl

$2,521Multiple Airlines

Sat, 3 Oct - Wed, 31 Mar

07:08 - 07:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

32h 47m1 stop San Francisco

20:55 - 20:16SYD Sydney Kingsford Smith-STL Lambert-St Louis

39h 21m2 stops Auckland Intl Houston George Bush Intcntl

$2,538Air New Zealand

Sun, 4 Oct - Tue, 6 Oct

18:43 - 10:50STL Lambert-St Louis-BNE Brisbane

49h 07m2 stops Dallas/Fort Worth Hong Kong Intl

12:20 - 21:59BNE Brisbane-STL Lambert-St Louis

48h 39m2 stops Hong Kong Intl Dallas/Fort Worth

$2,709Cathay Pacific

Sun, 4 Oct - Wed, 14 Oct

09:04 - 07:05STL Lambert-St Louis-BNE Brisbane

31h 01m2 stops Chicago O'Hare Intl Vancouver Intl

05:05 - 20:20BNE Brisbane-STL Lambert-St Louis

30h 15m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$2,781Air Canada

Sun, 4 Oct - Wed, 14 Oct

07:08 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

32h 47m1 stop San Francisco

18:15 - 22:30SYD Sydney Kingsford Smith-STL Lambert-St Louis

44h 15m2 stops Auckland Intl Houston George Bush Intcntl

$2,880Air New Zealand

Thu, 1 Oct - Thu, 8 Oct

12:27 - 10:55STL Lambert-St Louis-BNE Brisbane

31h 28m3 stops Las Vegas Harry Reid Intl Los Angeles Sydney Kingsford Smith

00:05 - 20:20BNE Brisbane-STL Lambert-St Louis

35h 15m2 stops Hong Kong Intl Toronto Pearson Intl

$2,930Multiple Airlines

Sun, 4 Oct - Wed, 14 Oct

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Air Canada flights from St. Louis to Australia

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

Air Canada

8 Mar

STL13:30Lambert-St Louis

27h 05m

2 stops

SYD09:35Sydney Kingsford Smith

20 Mar

SYD10:20Sydney Kingsford Smith

40h 21m

3 stops

STL10:41Lambert-St Louis

$2,089

Air Canada

6 Mar

STL16:05Lambert-St Louis

48h 30m

2 stops

SYD09:35Sydney Kingsford Smith

14 Mar

SYD11:20Sydney Kingsford Smith

44h 06m

2 stops

STL14:26Lambert-St Louis

$2,097

Air Canada

26 Feb

STL16:05Lambert-St Louis

52h 30m

3 stops

MEL13:35Melbourne

8 Mar

MEL07:30Melbourne

48h 56m

3 stops

STL15:26Lambert-St Louis

$2,117

United Airlines flights from St. Louis to Australia

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

United Airlines

1 Nov

STL19:05Lambert-St Louis

21h 15m

1 stop

SYD09:20Sydney Kingsford Smith

9 Nov

SYD09:15Sydney Kingsford Smith

24h 35m

1 stop

STL16:50Lambert-St Louis

$1,770

United Airlines

1 Nov

STL16:39Lambert-St Louis

23h 41m

2 stops

SYD09:20Sydney Kingsford Smith

9 Nov

SYD11:50Sydney Kingsford Smith

23h 19m

2 stops

STL18:09Lambert-St Louis

$1,776

United Airlines

11 Nov

STL14:55Lambert-St Louis

26h 35m

2 stops

MEL10:30Melbourne

18 Nov

MEL11:30Melbourne

23h 35m

2 stops

STL18:05Lambert-St Louis

$1,777

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 27/10

11:32-05:00

2 stops25h 28m

Melbourne

Wed 11/11

22:45-08:07

2 stops26h 22m

$1,750

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

08:48-06:45

2 stops29h 57m

Melbourne

Tue 3/11

22:45-09:30

2 stops27h 45m

$1,751

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

06:04-06:45

1 stop32h 41m

Melbourne

Tue 3/11

12:00-23:33

1 stop28h 33m

$1,757

Fastest return journey

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sun 1/11

19:05-09:20

1 stop21h 15m

Sydney Kingsford Smith

Mon 9/11

09:15-16:50

1 stop24h 35m

$1,770

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sun 1/11

16:39-09:20

2 stops23h 41m

Sydney Kingsford Smith

Mon 9/11

11:50-18:09

2 stops23h 19m

$1,776

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Mon 19/10

12:00-08:50

2 stops28h 50m

Melbourne

Mon 26/10

09:10-17:44

2 stops24h 34m

$1,776

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Sun 25/10

14:22-07:20

2 stops24h 58m

Sydney Kingsford Smith

Mon 9/11

10:40-23:56

2 stops30h 16m

$1,777

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Wed 11/11

14:55-09:30

2 stops25h 35m

Melbourne

Wed 18/11

12:45-18:05

1 stop22h 20m

$1,777

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

13:29-09:15

2 stops27h 46m

Melbourne

Tue 3/11

12:45-20:59

2 stops25h 14m

$1,783

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Mon 19/10

15:11-09:15

2 stops26h 04m

Melbourne

Mon 26/10

11:45-18:05

1 stop22h 20m

$1,784

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 $1,394. If you don’t want to visit Australia in May, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,800.

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

Best price found	$1,051
Fastest flight time	20h 25m
Direct flights	None

The best one-way flight to Australia from St. Louis in the past 72 hours is $1,051. The best return flight deal from St. Louis to Australia found on momondo in the last 72 hours is $1,750.

The fastest flight from St. Louis to Australia takes 20h 25m

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.