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

United Airlines, Cathay Pacific, 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 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.

$847 Cheap Flights from St. Louis to Australia in 2026

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.

05:40 - 05:00STL Lambert-St Louis-MEL Melbourne

31h 20m1 stop Dallas/Fort Worth

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

26h 22m2 stops Los Angeles Charlotte Douglas

$1,599American Airlines

Tue, 27 Oct - Wed, 11 Nov

19:20 - 08:50STL Lambert-St Louis-MEL Melbourne

45h 30m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:10 - 21:09MEL Melbourne-STL Lambert-St Louis

27h 59m2 stops Los Angeles Salt Lake City

$1,625Delta

Tue, 20 Oct - Tue, 3 Nov

19:20 - 08:50STL Lambert-St Louis-MEL Melbourne

45h 30m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:10 - 21:09MEL Melbourne-STL Lambert-St Louis

27h 59m2 stops Los Angeles Salt Lake City

$1,626Delta

Tue, 20 Oct - Tue, 3 Nov

11:10 - 09:15STL Lambert-St Louis-MEL Melbourne

30h 05m2 stops Houston George Bush Intcntl San Francisco

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

22h 20m1 stop San Francisco

$1,632United Airlines

Tue, 20 Oct - Tue, 3 Nov

15:12 - 09:15STL Lambert-St Louis-MEL Melbourne

26h 03m2 stops Houston George Bush Intcntl San Francisco

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

22h 20m1 stop San Francisco

$1,633United Airlines

Tue, 20 Oct - Tue, 3 Nov

07:30 - 08:00STL Lambert-St Louis-MEL Melbourne

31h 30m2 stops Salt Lake City Los Angeles

10:10 - 18:01MEL Melbourne-STL Lambert-St Louis

24h 51m2 stops Los Angeles Atlanta Hartsfield-Jackson

$1,694Delta

Fri, 26 Feb - Mon, 8 Mar

19:06 - 10:30STL Lambert-St Louis-MEL Melbourne

22h 24m1 stop San Francisco

12:45 - 21:55MEL Melbourne-STL Lambert-St Louis

26h 10m1 stop San Francisco

$1,696United Airlines

Fri, 26 Feb - Mon, 8 Mar

13:08 - 10:30STL Lambert-St Louis-MEL Melbourne

28h 22m3 stops Chicago O'Hare Intl Houston George Bush Intcntl San Francisco

11:30 - 16:56MEL Melbourne-STL Lambert-St Louis

22h 26m2 stops Los Angeles Chicago O'Hare Intl

$1,701United Airlines

Fri, 26 Feb - Mon, 8 Mar

13:08 - 10:30STL Lambert-St Louis-MEL Melbourne

28h 22m2 stops Chicago O'Hare Intl San Francisco

12:45 - 17:53MEL Melbourne-STL Lambert-St Louis

22h 08m1 stop San Francisco

$1,703United Airlines

Fri, 26 Feb - Mon, 8 Mar

10:20 - 12:25STL Lambert-St Louis-MEL Melbourne

35h 05m3 stops Dallas/Fort Worth Los Angeles Nadi

13:20 - 11:32MEL Melbourne-STL Lambert-St Louis

37h 12m3 stops Nadi Los Angeles Las Vegas Harry Reid Intl

$1,733Multiple Airlines

Sun, 13 Sep - Mon, 28 Sep

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:35 - 06:50STL Lambert-St Louis-PER Perth

35h 15m2 stops Seattle/Tacoma Intl Hong Kong Intl

00:10 - 14:21PER Perth-STL Lambert-St Louis

51h 11m2 stops Hong Kong Intl Seattle/Tacoma Intl

$2,004Multiple Airlines

Thu, 3 Sep - Mon, 14 Sep

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

35h 40m2 stops Los Angeles Hong Kong Intl

20:55 - 12:03SYD Sydney Kingsford Smith-STL Lambert-St Louis

30h 08m2 stops Tokyo Haneda Chicago O'Hare Intl

$2,996Multiple Airlines

Wed, 2 Sep - Fri, 4 Sep

06:00 - 07:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles

09:10 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 49m1 stop Los Angeles

$3,246Qantas Airways

Wed, 2 Sep - Fri, 4 Sep

08:42 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 13m1 stop San Francisco

09:55 - 14:13SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 18m2 stops Auckland Intl Houston George Bush Intcntl

$3,302Air New Zealand

Wed, 2 Sep - Fri, 4 Sep

06:00 - 07:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

34h 05m1 stop Los Angeles

18:15 - 22:59SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 44m2 stops Melbourne Los Angeles

$3,386Qantas Airways

Wed, 2 Sep - Fri, 4 Sep

08:55 - 21:40STL Lambert-St Louis-PER Perth

47h 45m3 stops Toronto Pearson Intl Vancouver Intl Sydney Kingsford Smith

13:15 - 20:20PER Perth-STL Lambert-St Louis

44h 05m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$3,407Multiple Airlines

Thu, 3 Sep - Tue, 15 Sep

09:32 - 06:50STL Lambert-St Louis-PER Perth

32h 18m2 stops Chicago O'Hare Intl Hong Kong Intl

15:30 - 20:20PER Perth-STL Lambert-St Louis

41h 50m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$3,664Multiple Airlines

Thu, 3 Sep - Tue, 15 Sep

12:59 - 07:20STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 21m2 stops Chicago O'Hare Intl Vancouver Intl

09:20 - 18:42SYD Sydney Kingsford Smith-STL Lambert-St Louis

48h 22m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$6,085Multiple Airlines

Wed, 2 Sep - Fri, 4 Sep

12:45 - 07:30STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 45m3 stops Dallas/Fort Worth Phoenix Sky Harbor Intl Los Angeles

21:25 - 09:24SYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 59m3 stops San Francisco Los Angeles Dallas/Fort Worth

$6,463Multiple Airlines

Wed, 2 Sep - Fri, 4 Sep

06:35 - 18:35STL Lambert-St Louis-PER Perth

47h 00m2 stops Seattle/Tacoma Intl Doha Hamad Intl

22:45 - 14:21PER Perth-STL Lambert-St Louis

52h 36m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$10,100Multiple Airlines

Thu, 3 Sep - Tue, 15 Sep

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Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

27 Oct

STL10:12Lambert-St Louis

26h 48m

1 stop

MEL05:00Melbourne

11 Nov

MEL22:45Melbourne

38h 57m

1 stop

STL20:42Lambert-St Louis

$1,837

Qantas Airways

27 Oct

STL10:12Lambert-St Louis

26h 48m

1 stop

MEL05:00Melbourne

11 Nov

MEL22:45Melbourne

38h 57m

1 stop

STL20:42Lambert-St Louis

$1,844

Qantas Airways

29 Sept

STL15:34Lambert-St Louis

24h 21m

1 stop

SYD06:55Sydney Kingsford Smith

6 Oct

SYD18:50Sydney Kingsford Smith

20h 56m

1 stop

STL23:46Lambert-St Louis

$1,851

American Airlines flights from St. Louis to Australia

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

American Airlines

27 Oct

STL05:40Lambert-St Louis

31h 20m

1 stop

MEL05:00Melbourne

11 Nov

MEL22:45Melbourne

26h 22m

2 stops

STL08:07Lambert-St Louis

$1,599

American Airlines

20 Oct

STL06:04Lambert-St Louis

32h 41m

1 stop

MEL06:45Melbourne

3 Nov

MEL12:00Melbourne

28h 33m

1 stop

STL23:33Lambert-St Louis

$1,817

American Airlines

20 Oct

STL06:04Lambert-St Louis

32h 41m

1 stop

MEL06:45Melbourne

3 Nov

MEL12:00Melbourne

28h 33m

1 stop

STL23:33Lambert-St Louis

$1,819

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

05:40-05:00

1 stop31h 20m

Melbourne

Wed 11/11

22:45-08:07

2 stops26h 22m

$1,599

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

19:20-08:50

2 stops45h 30m

Melbourne

Tue 3/11

10:10-21:09

2 stops27h 59m

$1,625

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

19:20-08:50

2 stops45h 30m

Melbourne

Tue 3/11

10:10-21:09

2 stops27h 59m

$1,626

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

11:10-09:15

2 stops30h 05m

Melbourne

Tue 3/11

12:45-18:05

1 stop22h 20m

$1,632

Fastest return journey

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 20/10

15:12-09:15

2 stops26h 03m

Melbourne

Tue 3/11

12:45-18:05

1 stop22h 20m

$1,633

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Fri 26/2

07:30-08:00

2 stops31h 30m

Melbourne

Mon 8/3

10:10-18:01

2 stops24h 51m

$1,694

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Fri 26/2

19:06-10:30

1 stop22h 24m

Melbourne

Mon 8/3

12:45-21:55

1 stop26h 10m

$1,696

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Fri 26/2

13:08-10:30

3 stops28h 22m

Melbourne

Mon 8/3

11:30-16:56

2 stops22h 26m

$1,701

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Fri 26/2

13:08-10:30

2 stops28h 22m

Melbourne

Mon 8/3

12:45-17:53

1 stop22h 08m

$1,703

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Sun 13/9

10:20-12:25

3 stops35h 05m

Melbourne

Mon 28/9

13:20-11:32

3 stops37h 12m

$1,733

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 $1,447. 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 $1,761.

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	$847
Fastest flight time	20h 24m
Direct flights	None

The best one-way flight to Australia from St. Louis in the past 72 hours is $847. The best return flight deal from St. Louis to Australia found on momondo in the last 72 hours is $1,599.

The fastest flight from St. Louis to Australia takes 20h 24m

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.