What airlines fly to Australia?

Qantas Airways, United Airlines and Air Canada are the top three most popular airlines that fly to Australia from St. Louis according to our data. Qantas Airways is the first choice among our users, with 45% 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.

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

Qantas Airways is the most popular carrier 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 4 operators available for flights from Lambert-St Louis Airport to Australia as of November 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.

$683 Cheap Flights from St. Louis to Australia in 2026/27

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.

2:35 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 15m2 stops Phoenix Sky Harbor Intl Los Angeles

1:10 pm - 11:59 pmBNE Brisbane-STL Lambert-St Louis

26h 49m1 stop Los Angeles

$1,204Qantas Airways

Sun, Feb 21 - Sun, Mar 7

2:21 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 29m2 stops Chicago O'Hare Intl Los Angeles

1:10 pm - 8:46 pmBNE Brisbane-STL Lambert-St Louis

23h 36m2 stops Los Angeles Chicago O'Hare Intl

$1,204Multiple Airlines

Sun, Feb 21 - Sun, Mar 7

2:35 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 15m2 stops Phoenix Sky Harbor Intl Los Angeles

1:10 pm - 11:59 pmBNE Brisbane-STL Lambert-St Louis

26h 49m1 stop Los Angeles

$1,205Qantas Airways

Sun, Feb 21 - Sun, Mar 7

2:21 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 29m2 stops Chicago O'Hare Intl Los Angeles

1:10 pm - 8:46 pmBNE Brisbane-STL Lambert-St Louis

23h 36m2 stops Los Angeles Chicago O'Hare Intl

$1,205Multiple Airlines

Sun, Feb 21 - Sun, Mar 7

8:40 am - 7:30 amSTL Lambert-St Louis-BNE Brisbane

30h 50m1 stop San Francisco

11:20 am - 9:55 pmBNE Brisbane-STL Lambert-St Louis

26h 35m1 stop San Francisco

$1,263United Airlines

Tue, Feb 23 - Fri, Mar 5

8:40 am - 7:30 amSTL Lambert-St Louis-BNE Brisbane

30h 50m1 stop San Francisco

11:20 am - 9:55 pmBNE Brisbane-STL Lambert-St Louis

26h 35m1 stop San Francisco

$1,263United Airlines

Fri, Feb 19 - Sat, Mar 6

6:01 am - 6:25 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 24m1 stop Los Angeles

2:05 pm - 6:09 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 04m1 stop Dallas/Fort Worth

$1,582American Airlines

Fri, Feb 5 - Sat, Feb 20

4:05 pm - 8:45 amSTL Lambert-St Louis-BNE Brisbane

48h 40m2 stops Toronto Pearson Intl Vancouver Intl

7:50 pm - 3:26 pmBNE Brisbane-STL Lambert-St Louis

58h 36m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,613Air Canada

Sat, Mar 6 - Mon, Mar 15

4:05 pm - 1:30 pmSTL Lambert-St Louis-BNE Brisbane

53h 25m3 stops Toronto Pearson Intl Vancouver Intl Sydney Kingsford Smith

5:05 am - 3:26 pmBNE Brisbane-STL Lambert-St Louis

49h 21m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,722Air Canada

Tue, Mar 2 - Tue, Mar 16

12:14 pm - 12:30 pmSTL Lambert-St Louis-PER Perth

34h 16m2 stops Dallas/Fort Worth Sydney Kingsford Smith

11:10 pm - 2:05 pmPER Perth-STL Lambert-St Louis

28h 55m2 stops Brisbane Dallas/Fort Worth

$2,570American Airlines

Sun, Dec 20 - Mon, Jan 18

Cheap last minute flights

Enter your travel dates to find the best prices.

11:00 am - 7:00 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 00m1 stop Houston George Bush Intcntl

11:50 am - 10:15 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

27h 25m1 stop San Francisco

$1,386United Airlines

Tue, Nov 17 - Tue, Nov 24

3:15 pm - 9:20 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 05m2 stops Chicago O'Hare Intl San Francisco

9:15 am - 2:13 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

21h 58m1 stop Houston George Bush Intcntl

$1,386United Airlines

Tue, Nov 17 - Tue, Nov 24

2:55 pm - 9:05 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 10m2 stops Houston George Bush Intcntl Los Angeles

11:20 am - 4:59 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 39m2 stops Los Angeles Chicago O'Hare Intl

$1,391United Airlines

Tue, Nov 17 - Tue, Nov 24

7:30 am - 7:25 pmSTL Lambert-St Louis-SYD Sydney Kingsford Smith

42h 55m3 stops Chicago O'Hare Intl Istanbul Singapore Changi

9:35 pm - 3:43 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

59h 08m3 stops Singapore Changi Istanbul Chicago O'Hare Intl

$2,203Turkish Airlines

Tue, Nov 17 - Tue, Nov 24

1:08 pm - 9:35 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

51h 27m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

10:20 pm - 11:59 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

42h 39m2 stops Hong Kong Intl Seattle/Tacoma Intl

$2,296Multiple Airlines

Tue, Nov 17 - Tue, Nov 24

8:10 am - 9:00 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

31h 50m1 stop Los Angeles

11:10 am - 8:40 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

26h 30m1 stop Los Angeles

$2,873Qantas Airways

Wed, Nov 18 - Sun, Dec 6

5:00 am - 6:35 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

32h 35m2 stops Dallas/Fort Worth Vancouver Intl

8:55 am - 1:55 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

46h 00m2 stops Auckland Intl Dallas/Fort Worth

$3,651Qantas Airways

Wed, Nov 18 - Sun, Dec 6

10:53 am - 10:35 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 42m3 stops Chicago O'Hare Intl Los Angeles Auckland Intl

9:55 am - 10:30 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 35m3 stops Auckland Intl Los Angeles Houston George Bush Intcntl

$3,777Multiple Airlines

Wed, Nov 18 - Sun, Dec 6

5:00 am - 6:35 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

32h 35m2 stops Dallas/Fort Worth Vancouver Intl

8:55 am - 1:55 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

46h 00m2 stops Auckland Intl Dallas/Fort Worth

$3,817Qantas Airways

Wed, Nov 18 - Sun, Dec 6

8:30 am - 7:00 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

29h 30m1 stop Houston George Bush Intcntl

11:20 am - 4:50 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 30m2 stops Los Angeles Houston George Bush Intcntl

$3,999United Airlines

Wed, Nov 18 - Sun, Dec 6

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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

Feb 1

STL10:45 amLambert-St Louis

30h 50m

2 stops

SYD10:35 amSydney Kingsford Smith

Feb 15

SYD7:25 pmSydney Kingsford Smith

44h 00m

2 stops

STL10:25 pmLambert-St Louis

$1,305

Air New Zealand

Feb 16

STL8:35 amLambert-St Louis

33h 20m

2 stops

MEL10:55 amMelbourne

Mar 9

MEL8:15 amMelbourne

30h 57m

2 stops

STL10:12 pmLambert-St Louis

$1,322

Air New Zealand

Feb 21

STL6:10 amLambert-St Louis

35h 50m

2 stops

BNE10:00 amBrisbane

Mar 9

BNE11:15 amBrisbane

26h 40m

2 stops

STL9:55 pmLambert-St Louis

$1,349

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

Feb 21

STL2:35 pmLambert-St Louis

23h 15m

2 stops

BNE5:50 amBrisbane

Mar 7

BNE1:10 pmBrisbane

26h 49m

1 stop

STL11:59 pmLambert-St Louis

$1,211

Qantas Airways

Feb 21

STL6:00 amLambert-St Louis

31h 50m

1 stop

BNE5:50 amBrisbane

Mar 7

BNE1:10 pmBrisbane

26h 49m

1 stop

STL11:59 pmLambert-St Louis

$1,221

Qantas Airways

Feb 20

STL6:54 pmLambert-St Louis

19h 36m

1 stop

BNE6:30 amBrisbane

Mar 6

BNE9:40 amBrisbane

20h 01m

1 stop

STL1:41 pmLambert-St Louis

$1,223

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sun 2/21

2:35 pm-5:50 am

2 stops23h 15m

Brisbane

Sun 3/7

1:10 pm-11:59 pm

1 stop26h 49m

$1,204

Quickest round-trip

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sun 2/21

2:21 pm-5:50 am

2 stops23h 29m

Brisbane

Sun 3/7

1:10 pm-8:46 pm

2 stops23h 36m

$1,204

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sun 2/21

2:35 pm-5:50 am

2 stops23h 15m

Brisbane

Sun 3/7

1:10 pm-11:59 pm

1 stop26h 49m

$1,205

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sun 2/21

2:21 pm-5:50 am

2 stops23h 29m

Brisbane

Sun 3/7

1:10 pm-8:46 pm

2 stops23h 36m

$1,205

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Tue 2/23

8:40 am-7:30 am

1 stop30h 50m

Brisbane

Fri 3/5

11:20 am-9:55 pm

1 stop26h 35m

$1,263

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Fri 2/19

8:40 am-7:30 am

1 stop30h 50m

Brisbane

Sat 3/6

11:20 am-9:55 pm

1 stop26h 35m

$1,263

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 2/5

6:01 am-6:25 am

1 stop31h 24m

Sydney Kingsford Smith

Sat 2/20

2:05 pm-6:09 pm

1 stop21h 04m

$1,582

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sat 3/6

4:05 pm-8:45 am

2 stops48h 40m

Brisbane

Mon 3/15

7:50 pm-3:26 pm

3 stops58h 36m

$1,613

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Tue 3/2

4:05 pm-1:30 pm

3 stops53h 25m

Brisbane

Tue 3/16

5:05 am-3:26 pm

3 stops49h 21m

$1,722

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 12/20

12:14 pm-12:30 pm

2 stops34h 16m

Perth

Mon 1/18

11:10 pm-2:05 pm

2 stops28h 55m

$2,570

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 $975. 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 $1,237.

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

You could potentially save up to 15% 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	$683
Fastest flight time	22h 10m
Direct flights	None

The best one-way flight to Australia from St. Louis in the past 72 hours is $683. The best round-trip flight deal from St. Louis to Australia found on momondo in the last 72 hours is $1,204.

The fastest flight from St. Louis to Australia takes 22h 10m

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 November 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 $894	Free Cancellation	Rating 7.1 11,898 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.3 10,491 reviews	Search United Airlines flights
Qantas Airways	PriceFrom $1,039	Free Cancellation	Rating 7.5 1,125 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,233	Free Cancellation	Rating 7.0 12,231 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.