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

Qantas Airways, American Airlines, and United Airlines are the most popular carriers operating from Lambert-St Louis to Australia

What airlines fly to Australia?

United Airlines, Qantas Airways and American Airlines are the top three most popular airlines that fly to Australia from St. Louis according to our data. United Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 4 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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 refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Australia?

There are 4 operators available for flights from Lambert-St Louis Airport to Australia as of July 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Australia?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Australia.

What documentation or ID do you need to fly to Australia?

The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$594 Cheap Flights from St. Louis to Australia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:10 pm - 7:05 am

STL

BNE

51h 55m

2 stops

10:00 am - 12:40 pm

BNE

STL

41h 40m

2 stops

$1,082Air Canada

Mon, Aug 3 - Mon, Aug 31

4:05 pm - 7:45 am

STL

BNE

48h 40m

2 stops

10:45 am - 3:26 pm

BNE

STL

44h 41m

2 stops

$1,098Air Canada

Sun, Oct 25 - Wed, Nov 18

7:10 pm - 5:00 am

STL

MEL

41h 50m

1 stop

12:00 pm - 5:54 pm

MEL

STL

22h 54m

1 stop

$1,108Qantas Airways

Tue, Oct 20 - Tue, Nov 3

7:10 pm - 5:00 am

STL

MEL

41h 50m

1 stop

12:00 pm - 5:54 pm

MEL

STL

22h 54m

1 stop

$1,109Qantas Airways

Tue, Oct 20 - Tue, Nov 3

12:47 pm - 9:30 am

STL

MEL

28h 43m

2 stops

10:45 pm - 8:07 am

MEL

STL

26h 22m

2 stops

$1,122American Airlines

Tue, Oct 27 - Wed, Nov 11

2:40 pm - 4:05 pm

STL

AVV

33h 25m

3 stops

6:00 am - 3:26 pm

AVV

STL

50h 26m

3 stops

$1,124Multiple Airlines

Tue, Oct 20 - Tue, Nov 3

6:37 am - 5:00 am

STL

BNE

31h 23m

1 stop

8:35 pm - 9:24 am

BNE

STL

27h 49m

2 stops

$1,141American Airlines

Mon, Aug 3 - Mon, Aug 31

6:15 am - 9:15 am

STL

MEL

35h 00m

2 stops

12:45 pm - 7:03 pm

MEL

STL

22h 18m

1 stop

$1,144United Airlines

Sun, Oct 11 - Sun, Nov 1

7:08 am - 9:15 am

STL

MEL

34h 07m

1 stop

12:45 pm - 6:03 pm

MEL

STL

22h 18m

1 stop

$1,149United Airlines

Sun, Oct 11 - Tue, Nov 3

4:05 pm - 11:30 am

STL

BNE

52h 25m

3 stops

6:10 am - 3:26 pm

BNE

STL

49h 16m

3 stops

$1,151Multiple Airlines

Sun, Oct 25 - Wed, Nov 18

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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

Jul 26

STL7:23 pmLambert-St Louis

20h 32m

1 stop

SYD6:55 amSydney Kingsford Smith

Jul 28

SYD9:55 amSydney Kingsford Smith

47h 22m

2 stops

STL6:17 pmLambert-St Louis

$2,054

Air New Zealand

Sep 5

STL3:32 pmLambert-St Louis

31h 08m

3 stops

CNS1:40 pmCairns

Sep 12

CNS6:00 amCairns

43h 10m

3 stops

STL10:10 amLambert-St Louis

$2,094

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

Oct 20

STL7:10 pmLambert-St Louis

41h 50m

1 stop

MEL5:00 amMelbourne

Nov 3

MEL12:00 pmMelbourne

22h 54m

1 stop

STL5:54 pmLambert-St Louis

$1,108

Qantas Airways

Oct 20

STL7:10 pmLambert-St Louis

41h 50m

1 stop

MEL5:00 amMelbourne

Nov 3

MEL12:00 pmMelbourne

22h 54m

1 stop

STL5:54 pmLambert-St Louis

$1,109

Qantas Airways

Sep 1

STL6:00 amLambert-St Louis

37h 55m

2 stops

SYD10:55 amSydney Kingsford Smith

Sep 21

SYD12:00 pmSydney Kingsford Smith

21h 04m

1 stop

STL6:04 pmLambert-St Louis

$1,111

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 8/3

12:10 pm-7:05 am

2 stops51h 55m

Brisbane

Mon 8/31

10:00 am-12:40 pm

2 stops41h 40m

$1,082

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 10/25

4:05 pm-7:45 am

2 stops48h 40m

Brisbane

Wed 11/18

10:45 am-3:26 pm

2 stops44h 41m

$1,098

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 10/20

7:10 pm-5:00 am

1 stop41h 50m

Melbourne

Tue 11/3

12:00 pm-5:54 pm

1 stop22h 54m

$1,108

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 10/20

7:10 pm-5:00 am

1 stop41h 50m

Melbourne

Tue 11/3

12:00 pm-5:54 pm

1 stop22h 54m

$1,109

Quickest round-trip

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 10/27

12:47 pm-9:30 am

2 stops28h 43m

Melbourne

Wed 11/11

10:45 pm-8:07 am

2 stops26h 22m

$1,122

St. LouisMelbourne

STL - AVV

STLAVV

Lambert-St Louis

Tue 10/20

2:40 pm-4:05 pm

3 stops33h 25m

Melbourne Avalon

Tue 11/3

6:00 am-3:26 pm

3 stops50h 26m

$1,124

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 8/3

6:37 am-5:00 am

1 stop31h 23m

Brisbane

Mon 8/31

8:35 pm-9:24 am

2 stops27h 49m

$1,141

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 10/11

6:15 am-9:15 am

2 stops35h 00m

Melbourne

Sun 11/1

12:45 pm-7:03 pm

1 stop22h 18m

$1,144

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sun 10/11

7:08 am-9:15 am

1 stop34h 07m

Melbourne

Tue 11/3

12:45 pm-6:03 pm

1 stop22h 18m

$1,149

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 10/25

4:05 pm-11:30 am

3 stops52h 25m

Brisbane

Wed 11/18

6:10 am-3:26 pm

3 stops49h 16m

$1,151

Flights are sorted by cheapest round-trip 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?

The month of May is, on average, the cheapest month to fly to Australia from St. Louis, with most prices found around $992. If you aren’t able to travel during the month of May, then book flights to Australia from St. Louis during February instead. Flights to Australia in February, while not as cheap as those in May, still average around $1,262.

Can stopping save me money on St. Louis to Australia flights?

You could potentially save up to 19% 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	21h 14m
Direct flights	None

The fastest flight from St. Louis to Australia takes 21h 14m

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 refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Australia?
There are 4 operators available for flights from Lambert-St Louis Airport to Australia as of July 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Australia?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Qantas Airways	PriceFrom $857	Free Cancellation	Rating 7.5 1,066 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $894	Free Cancellation	Rating 7.1 11,371 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.4 10,020 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,056	Free Cancellation	Rating 7.1 11,834 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Australia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Australia from St. Louis.

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?

Once you have performed a search for St. Louis to Australia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Australia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Australia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Australia and let you know when they change.