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 39% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 5 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

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 refresh daily.

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

There are 5 operators available for flights from Lambert-St Louis Airport to Australia as of March 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.

$516 Cheap Flights from St. Louis to Australia in 2026

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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.

1:00 pm - 7:05 am

STL

BNE

51h 05m

2 stops

10:00 am - 8:05 pm

BNE

STL

25h 05m

2 stops

$889Air Canada

Mon, May 25 - Mon, Jun 8

1:00 pm - 7:05 am

STL

BNE

27h 05m

2 stops

10:00 am - 8:05 pm

BNE

STL

25h 05m

2 stops

$892Air Canada

Tue, May 26 - Fri, Jun 5

2:20 pm - 7:05 am

STL

BNE

25h 45m

2 stops

10:00 am - 8:05 pm

BNE

STL

25h 05m

2 stops

$907Multiple Airlines

Mon, May 25 - Fri, Jun 5

2:20 pm - 7:05 am

STL

BNE

25h 45m

2 stops

10:00 am - 8:05 pm

BNE

STL

25h 05m

2 stops

$908Multiple Airlines

Tue, May 26 - Fri, Jun 5

6:21 am - 9:20 am

STL

SYD

35h 59m

2 stops

12:00 pm - 5:21 pm

SYD

STL

20h 21m

1 stop

$1,097Qantas Airways

Mon, May 4 - Mon, May 18

6:30 am - 9:20 am

STL

SYD

35h 50m

2 stops

12:00 pm - 4:51 pm

SYD

STL

19h 51m

1 stop

$1,101Qantas Airways

Thu, Aug 6 - Thu, Aug 13

3:38 pm - 5:00 am

STL

MEL

22h 22m

1 stop

9:45 am - 11:57 pm

MEL

STL

29h 12m

1 stop

$1,105American Airlines

Mon, Apr 13 - Mon, Apr 20

11:46 am - 6:00 am

STL

MEL

26h 14m

1 stop

9:45 am - 11:57 pm

MEL

STL

29h 12m

1 stop

$1,112American Airlines

Fri, Apr 3 - Sun, Apr 19

7:05 pm - 9:15 am

STL

MEL

22h 10m

1 stop

9:30 am - 4:56 pm

MEL

STL

22h 26m

2 stops

$1,128United Airlines

Fri, Apr 3 - Sun, Apr 19

7:23 pm - 6:55 am

STL

SYD

20h 32m

1 stop

10:20 am - 6:17 pm

SYD

STL

22h 57m

1 stop

$1,144United Airlines

Sun, May 24 - Wed, Jun 10

United Airlines flights from St. Louis to Australia

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

United Airlines

May 27

STL7:23 pmLambert-St Louis

20h 07m

1 stop

BNE6:30 amBrisbane

Jun 7

BNE10:30 amBrisbane

22h 47m

1 stop

STL6:17 pmLambert-St Louis

$1,064

United Airlines

May 24

STL7:23 pmLambert-St Louis

20h 07m

1 stop

BNE6:30 amBrisbane

Jun 2

BNE10:30 amBrisbane

22h 47m

1 stop

STL6:17 pmLambert-St Louis

$1,065

United Airlines

May 28

STL8:15 pmLambert-St Louis

43h 15m

2 stops

BNE6:30 amBrisbane

Jun 10

BNE10:30 amBrisbane

22h 47m

1 stop

STL6:17 pmLambert-St Louis

$1,069

Delta flights from St. Louis to Australia

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

Delta

May 23

STL7:05 pmLambert-St Louis

44h 45m

2 stops

SYD6:50 amSydney Kingsford Smith

Jun 7

SYD9:15 amSydney Kingsford Smith

22h 30m

2 stops

STL4:45 pmLambert-St Louis

$1,137

Delta

Apr 13

STL1:02 pmLambert-St Louis

26h 48m

2 stops

SYD6:50 amSydney Kingsford Smith

Apr 20

SYD9:15 amSydney Kingsford Smith

30h 10m

2 stops

STL12:25 amLambert-St Louis

$1,138

Delta

Mar 8

STL2:22 pmLambert-St Louis

23h 43m

2 stops

SYD6:05 amSydney Kingsford Smith

Mar 22

SYD9:40 amSydney Kingsford Smith

30h 41m

2 stops

STL12:21 amLambert-St Louis

$1,150

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 5/25

1:00 pm-7:05 am

2 stops51h 05m

Brisbane

Mon 6/8

10:00 am-8:05 pm

2 stops25h 05m

$889

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 5/26

1:00 pm-7:05 am

2 stops27h 05m

Brisbane

Fri 6/5

10:00 am-8:05 pm

2 stops25h 05m

$892

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Mon 5/25

2:20 pm-7:05 am

2 stops25h 45m

Brisbane

Fri 6/5

10:00 am-8:05 pm

2 stops25h 05m

$907

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 5/26

2:20 pm-7:05 am

2 stops25h 45m

Brisbane

Fri 6/5

10:00 am-8:05 pm

2 stops25h 05m

$908

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 5/4

6:21 am-9:20 am

2 stops35h 59m

Sydney Kingsford Smith

Mon 5/18

12:00 pm-5:21 pm

1 stop20h 21m

$1,097

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 8/6

6:30 am-9:20 am

2 stops35h 50m

Sydney Kingsford Smith

Thu 8/13

12:00 pm-4:51 pm

1 stop19h 51m

$1,101

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 4/13

3:38 pm-5:00 am

1 stop22h 22m

Melbourne

Mon 4/20

9:45 am-11:57 pm

1 stop29h 12m

$1,105

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 4/3

11:46 am-6:00 am

1 stop26h 14m

Melbourne

Sun 4/19

9:45 am-11:57 pm

1 stop29h 12m

$1,112

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 4/3

7:05 pm-9:15 am

1 stop22h 10m

Melbourne

Sun 4/19

9:30 am-4:56 pm

2 stops22h 26m

$1,128

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 5/24

7:23 pm-6:55 am

1 stop20h 32m

Sydney Kingsford Smith

Wed 6/10

10:20 am-6:17 pm

1 stop22h 57m

$1,144

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 August is, on average, the cheapest month to fly to Australia from St. Louis, with most prices found around $1,275. If you aren’t able to travel during the month of August, then book flights to Australia from St. Louis during March instead. Flights to Australia in March, while not as cheap as those in August, still average around $1,299.

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

You could potentially save up to 24% 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 refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Australia?
There are 5 operators available for flights from Lambert-St Louis Airport to Australia as of March 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
Air Canada	PriceFrom $608	Free Cancellation	Rating 7.1 10,769 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $975	Free Cancellation	Rating 7.5 1,000 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.4 9,375 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,078	Free Cancellation	Rating 7.1 11,371 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $1,132	Free Cancellation	Rating 8.0 228 reviews	Search Fiji Airways 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.