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 Air Canada 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 37% 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 October 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.

$560 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.

2:27 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 23m2 stops Phoenix Sky Harbor Intl Los Angeles

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

26h 00m2 stops Los Angeles Dallas/Fort Worth

$1,108American Airlines

Thu, Feb 18 - Mon, Mar 1

2:24 pm - 5:50 amSTL Lambert-St Louis-BNE Brisbane

23h 26m2 stops Dallas/Fort Worth Los Angeles

1:10 pm - 11:56 pmBNE Brisbane-STL Lambert-St Louis

26h 46m1 stop Los Angeles

$1,108American Airlines

Thu, Feb 18 - Mon, Mar 1

12:08 pm - 6:30 amSTL Lambert-St Louis-BNE Brisbane

26h 22m1 stop Dallas/Fort Worth

1:10 pm - 11:56 pmBNE Brisbane-STL Lambert-St Louis

25h 46m1 stop Los Angeles

$1,113Qantas Airways

Sat, Mar 6 - Mon, Mar 15

1:30 pm - 7:30 amSTL Lambert-St Louis-BNE Brisbane

26h 00m2 stops Denver Intl San Francisco

10:20 am - 9:55 pmBNE Brisbane-STL Lambert-St Louis

26h 35m1 stop San Francisco

$1,120United Airlines

Sat, Mar 6 - Mon, Mar 15

8:33 am - 7:30 amSTL Lambert-St Louis-BNE Brisbane

30h 57m2 stops Chicago O'Hare Intl San Francisco

10:20 am - 8:59 pmBNE Brisbane-STL Lambert-St Louis

25h 39m2 stops San Francisco Denver Intl

$1,120United Airlines

Sat, Mar 6 - Mon, Mar 15

12:08 pm - 6:55 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

25h 47m1 stop Dallas/Fort Worth

6:05 am - 1:39 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 34m2 stops Brisbane Dallas/Fort Worth

$1,139Multiple Airlines

Mon, Mar 8 - Sat, Mar 20

2:24 pm - 6:55 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 31m1 stop Dallas/Fort Worth

7:20 am - 1:39 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 19m2 stops Brisbane Dallas/Fort Worth

$1,139Multiple Airlines

Fri, Feb 19 - Mon, Mar 1

2:24 pm - 6:55 amSTL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 31m1 stop Dallas/Fort Worth

6:05 am - 6:13 pmSYD Sydney Kingsford Smith-STL Lambert-St Louis

28h 08m2 stops Brisbane Dallas/Fort Worth

$1,158Qantas Airways

Mon, Mar 8 - Thu, Mar 18

4:05 pm - 7:45 amSTL Lambert-St Louis-BNE Brisbane

47h 40m2 stops Toronto Pearson Intl Vancouver Intl

9:45 am - 3:26 pmBNE Brisbane-STL Lambert-St Louis

44h 41m2 stops Vancouver Intl Toronto Pearson Intl

$1,436Air Canada

Fri, Mar 12 - Sun, Mar 21

4:05 pm - 1:20 pmSTL Lambert-St Louis-CBR Canberra

52h 15m3 stops Toronto Pearson Intl Vancouver Intl Sydney Kingsford Smith

7:55 am - 3:26 pmCBR Canberra-STL Lambert-St Louis

48h 31m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,511Air Canada

Tue, Nov 10 - Tue, Nov 17

Cheap last minute flights

Enter your travel dates to find the best prices.

11:10 am - 9:15 amSTL Lambert-St Louis-MEL Melbourne

30h 05m2 stops Houston George Bush Intcntl San Francisco

12:45 pm - 6:05 pmMEL Melbourne-STL Lambert-St Louis

22h 20m1 stop San Francisco

$1,247United Airlines

Tue, Oct 20 - Tue, Nov 3

1:29 pm - 9:15 amSTL Lambert-St Louis-MEL Melbourne

27h 46m2 stops Chicago O'Hare Intl San Francisco

12:45 pm - 8:59 pmMEL Melbourne-STL Lambert-St Louis

25h 14m2 stops San Francisco Denver Intl

$1,247United Airlines

Tue, Oct 20 - Tue, Nov 3

5:35 pm - 8:50 amSTL Lambert-St Louis-MEL Melbourne

47h 15m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:10 am - 9:09 pmMEL Melbourne-STL Lambert-St Louis

27h 59m2 stops Los Angeles Salt Lake City

$1,256Delta

Tue, Oct 20 - Tue, Nov 3

6:04 am - 10:30 amSTL Lambert-St Louis-MEL Melbourne

36h 26m2 stops Los Angeles Brisbane

12:00 pm - 5:55 pmMEL Melbourne-STL Lambert-St Louis

22h 55m1 stop Dallas/Fort Worth

$1,335Qantas Airways

Tue, Oct 20 - Tue, Nov 3

1:29 pm - 9:15 amSTL Lambert-St Louis-MEL Melbourne

27h 46m2 stops Chicago O'Hare Intl San Francisco

12:45 pm - 8:59 pmMEL Melbourne-STL Lambert-St Louis

25h 14m2 stops San Francisco Denver Intl

$1,346United Airlines

Tue, Oct 20 - Tue, Nov 3

11:10 am - 9:15 amSTL Lambert-St Louis-MEL Melbourne

30h 05m2 stops Houston George Bush Intcntl San Francisco

12:45 pm - 6:05 pmMEL Melbourne-STL Lambert-St Louis

22h 20m1 stop San Francisco

$1,346United Airlines

Tue, Oct 20 - Tue, Nov 3

7:10 pm - 5:00 amSTL Lambert-St Louis-MEL Melbourne

41h 50m1 stop Dallas/Fort Worth

12:00 pm - 5:55 pmMEL Melbourne-STL Lambert-St Louis

22h 55m1 stop Dallas/Fort Worth

$1,366Qantas Airways

Tue, Oct 20 - Tue, Nov 3

6:04 am - 6:45 amSTL Lambert-St Louis-MEL Melbourne

32h 41m1 stop Los Angeles

12:00 pm - 11:33 pmMEL Melbourne-STL Lambert-St Louis

28h 33m1 stop Dallas/Fort Worth

$1,380American Airlines

Tue, Oct 20 - Tue, Nov 3

6:04 am - 6:45 amSTL Lambert-St Louis-MEL Melbourne

32h 41m1 stop Los Angeles

12:00 pm - 5:55 pmMEL Melbourne-STL Lambert-St Louis

22h 55m1 stop Dallas/Fort Worth

$1,396Qantas Airways

Tue, Oct 20 - Tue, Nov 3

6:04 am - 6:45 amSTL Lambert-St Louis-MEL Melbourne

32h 41m1 stop Los Angeles

12:00 pm - 11:33 pmMEL Melbourne-STL Lambert-St Louis

28h 33m1 stop Dallas/Fort Worth

$1,481American Airlines

Tue, Oct 20 - Tue, Nov 3

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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

Mar 6

STL12:08 pmLambert-St Louis

26h 22m

1 stop

BNE6:30 amBrisbane

Mar 15

BNE1:10 pmBrisbane

25h 46m

1 stop

STL11:56 pmLambert-St Louis

$1,113

Qantas Airways

Mar 8

STL2:24 pmLambert-St Louis

23h 31m

1 stop

SYD6:55 amSydney Kingsford Smith

Mar 24

SYD9:50 pmSydney Kingsford Smith

36h 23m

2 stops

STL6:13 pmLambert-St Louis

$1,161

Qantas Airways

Mar 6

STL12:08 pmLambert-St Louis

26h 22m

1 stop

BNE6:30 amBrisbane

Mar 15

BNE9:40 amBrisbane

18h 59m

1 stop

STL1:39 pmLambert-St Louis

$1,163

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

Nov 30

STL6:15 amLambert-St Louis

35h 40m

2 stops

MEL10:55 amMelbourne

Jan 25

MEL7:10 pmMelbourne

44h 24m

2 stops

STL10:34 pmLambert-St Louis

$1,327

Air New Zealand

Nov 30

STL6:15 amLambert-St Louis

35h 40m

2 stops

MEL10:55 amMelbourne

Jan 25

MEL7:10 pmMelbourne

44h 24m

2 stops

STL10:34 pmLambert-St Louis

$1,340

Air New Zealand

Jan 29

STL10:45 amLambert-St Louis

28h 50m

2 stops

SYD8:35 amSydney Kingsford Smith

May 15

SYD7:20 pmSydney Kingsford Smith

41h 49m

2 stops

STL10:09 pmLambert-St Louis

$1,345

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Thu 2/18

2:27 pm-5:50 am

2 stops23h 23m

Brisbane

Mon 3/1

1:10 pm-11:10 pm

2 stops26h 00m

$1,108

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Thu 2/18

2:24 pm-5:50 am

2 stops23h 26m

Brisbane

Mon 3/1

1:10 pm-11:56 pm

1 stop26h 46m

$1,108

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sat 3/6

12:08 pm-6:30 am

1 stop26h 22m

Brisbane

Mon 3/15

1:10 pm-11:56 pm

1 stop25h 46m

$1,113

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sat 3/6

1:30 pm-7:30 am

2 stops26h 00m

Brisbane

Mon 3/15

10:20 am-9:55 pm

1 stop26h 35m

$1,120

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sat 3/6

8:33 am-7:30 am

2 stops30h 57m

Brisbane

Mon 3/15

10:20 am-8:59 pm

2 stops25h 39m

$1,120

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 3/8

12:08 pm-6:55 am

1 stop25h 47m

Sydney Kingsford Smith

Sat 3/20

6:05 am-1:39 pm

2 stops23h 34m

$1,139

Quickest round-trip

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Fri 2/19

2:24 pm-6:55 am

1 stop23h 31m

Sydney Kingsford Smith

Mon 3/1

7:20 am-1:39 pm

2 stops23h 19m

$1,139

St. LouisSydney

STL Lambert-St Louis - SYD Sydney Kingsford Smith

STLSYD

Lambert-St Louis

Mon 3/8

2:24 pm-6:55 am

1 stop23h 31m

Sydney Kingsford Smith

Thu 3/18

6:05 am-6:13 pm

2 stops28h 08m

$1,158

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Fri 3/12

4:05 pm-7:45 am

2 stops47h 40m

Brisbane

Sun 3/21

9:45 am-3:26 pm

2 stops44h 41m

$1,436

St. LouisCanberra

STL Lambert-St Louis - CBR Canberra

STLCBR

Lambert-St Louis

Tue 11/10

4:05 pm-1:20 pm

3 stops52h 15m

Canberra

Tue 11/17

7:55 am-3:26 pm

3 stops48h 31m

$1,511

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 $967. 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 $1,259.

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

Best Price Found	$560
Fastest flight time	20h 30m
Direct flights	None

The best one-way flight to Australia from St. Louis in the past 72 hours is $560. The best round-trip flight deal from St. Louis to Australia found on momondo in the last 72 hours is $1,108.

The fastest flight from St. Louis to Australia takes 20h 30m

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 October 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 1,112 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $894	Free Cancellation	Rating 7.1 11,774 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.4 10,383 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,233	Free Cancellation	Rating 7.0 12,181 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.