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 40% 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, American Airlines, and United Airlines 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 January 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.

$570 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.

4:13 pm - 3:35 pm

STL

MEL

30h 22m

2 stops

12:00 pm - 11:59 pm

MEL

STL

28h 59m

1 stop

$926Qantas Airways

Tue, Feb 24 - Tue, Mar 3

6:50 pm - 5:15 pm

STL

MEL

29h 25m

2 stops

12:00 pm - 11:59 pm

MEL

STL

27h 59m

1 stop

$932Qantas Airways

Thu, Mar 5 - Thu, Mar 12

2:45 pm - 8:45 am

STL

BNE

26h 00m

2 stops

10:45 am - 3:29 pm

BNE

STL

44h 44m

2 stops

$954Multiple Airlines

Sun, Feb 8 - Sun, Feb 15

4:05 pm - 8:45 am

STL

BNE

24h 40m

2 stops

10:45 am - 3:29 pm

BNE

STL

44h 44m

2 stops

$958Air Canada

Thu, Feb 26 - Thu, Mar 5

4:05 pm - 8:45 am

STL

BNE

48h 40m

2 stops

10:45 am - 4:58 pm

BNE

STL

22h 13m

2 stops

$960Multiple Airlines

Tue, Feb 10 - Wed, Feb 18

1:00 pm - 7:05 am

STL

BNE

27h 05m

2 stops

10:00 am - 8:05 pm

BNE

STL

25h 05m

2 stops

$1,050Air Canada

Fri, May 15 - Thu, May 28

4:13 pm - 9:30 am

STL

MEL

24h 17m

2 stops

9:45 am - 5:13 pm

MEL

STL

23h 28m

2 stops

$1,140American Airlines

Mon, Feb 23 - Sun, Mar 29

5:12 am - 5:00 am

STL

MEL

30h 48m

1 stop

9:45 am - 11:59 pm

MEL

STL

30h 14m

1 stop

$1,145American Airlines

Mon, Feb 23 - Sun, Mar 29

5:25 pm - 6:00 pm

STL

CBR

31h 35m

2 stops

6:30 am - 4:44 pm

CBR

STL

27h 14m

2 stops

$1,578United Airlines

Wed, Feb 25 - Wed, Mar 4

5:00 pm - 6:00 pm

STL

CBR

32h 00m

2 stops

6:30 am - 3:37 pm

CBR

STL

26h 07m

2 stops

$1,628United Airlines

Sat, Feb 7 - Tue, Feb 10

Air Canada flights from St. Louis to Australia

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

Air Canada

Feb 26

STL4:05 pmLambert-St Louis

24h 40m

2 stops

BNE8:45 amBrisbane

Mar 5

BNE10:45 amBrisbane

44h 44m

2 stops

STL3:29 pmLambert-St Louis

$958

Air Canada

May 15

STL1:00 pmLambert-St Louis

27h 05m

2 stops

BNE7:05 amBrisbane

May 28

BNE10:00 amBrisbane

25h 05m

2 stops

STL8:05 pmLambert-St Louis

$1,050

Air Canada

May 16

STL2:20 pmLambert-St Louis

25h 45m

2 stops

BNE7:05 amBrisbane

May 28

BNE10:00 amBrisbane

25h 05m

2 stops

STL8:05 pmLambert-St Louis

$1,055

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

Feb 24

STL4:13 pmLambert-St Louis

30h 22m

2 stops

MEL3:35 pmMelbourne

Mar 3

MEL12:00 pmMelbourne

28h 59m

1 stop

STL11:59 pmLambert-St Louis

$926

Qantas Airways

Mar 5

STL6:50 pmLambert-St Louis

29h 25m

2 stops

MEL5:15 pmMelbourne

Mar 12

MEL12:00 pmMelbourne

27h 59m

1 stop

STL11:59 pmLambert-St Louis

$932

Qantas Airways

Feb 24

STL6:38 amLambert-St Louis

33h 22m

1 stop

SYD9:00 amSydney Kingsford Smith

Mar 3

SYD7:05 amSydney Kingsford Smith

33h 54m

2 stops

STL11:59 pmLambert-St Louis

$939

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Tue 2/24

4:13 pm-3:35 pm

2 stops30h 22m

Melbourne

Tue 3/3

12:00 pm-11:59 pm

1 stop28h 59m

$926

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Thu 3/5

6:50 pm-5:15 pm

2 stops29h 25m

Melbourne

Thu 3/12

12:00 pm-11:59 pm

1 stop27h 59m

$932

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Sun 2/8

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

Sun 2/15

10:45 am-3:29 pm

2 stops44h 44m

$954

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Thu 2/26

4:05 pm-8:45 am

2 stops24h 40m

Brisbane

Thu 3/5

10:45 am-3:29 pm

2 stops44h 44m

$958

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Tue 2/10

4:05 pm-8:45 am

2 stops48h 40m

Brisbane

Wed 2/18

10:45 am-4:58 pm

2 stops22h 13m

$960

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Fri 5/15

1:00 pm-7:05 am

2 stops27h 05m

Brisbane

Thu 5/28

10:00 am-8:05 pm

2 stops25h 05m

$1,050

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/23

4:13 pm-9:30 am

2 stops24h 17m

Melbourne

Sun 3/29

9:45 am-5:13 pm

2 stops23h 28m

$1,140

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/23

5:12 am-5:00 am

1 stop30h 48m

Melbourne

Sun 3/29

9:45 am-11:59 pm

1 stop30h 14m

$1,145

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Wed 2/25

5:25 pm-6:00 pm

2 stops31h 35m

Canberra

Wed 3/4

6:30 am-4:44 pm

2 stops27h 14m

$1,578

St. LouisCanberra

STL - CBR

STLCBR

Lambert-St Louis

Sat 2/7

5:00 pm-6:00 pm

2 stops32h 00m

Canberra

Tue 2/10

6:30 am-3:37 pm

2 stops26h 07m

$1,628

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 $1,205. If you aren’t able to travel during the month of August, then book flights to Australia from St. Louis during November instead. Flights to Australia in November, while not as cheap as those in August, still average around $1,344.

How far in advance should I book a flight to Australia?

You are more likely to see cheaper flights to Australia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,436 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from St. Louis for as low as $948 on momondo.

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

You could potentially save up to 14% 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 25m
Direct flights	None

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

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 January 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 $897	Free Cancellation	Rating 7.1 10,618 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $975	Free Cancellation	Rating 7.5 969 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $1,027	Free Cancellation	Rating 7.4 9,144 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,118	Free Cancellation	Rating 7.2 11,111 reviews	Search American Airlines flights
Fiji Airways	PriceFrom $1,132	Free Cancellation	Rating 8.0 216 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.