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

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

What airlines fly to Australia?

Qantas Airways, United Airlines and American Airlines 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 38% 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 August 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.

$595 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.

5:40 am - 5:00 amSTL Lambert-St Louis-MEL Melbourne

31h 20m1 stop Dallas/Fort Worth

10:45 pm - 8:07 amMEL Melbourne-STL Lambert-St Louis

26h 22m2 stops Los Angeles Los Angeles Charlotte Douglas

$1,145American Airlines

Tue, Oct 27 - Wed, Nov 11

10:22 am - 5:00 amSTL Lambert-St Louis-MEL Melbourne

26h 38m2 stops Charlotte Douglas Dallas/Fort Worth

10:45 pm - 8:07 amMEL Melbourne-STL Lambert-St Louis

26h 22m2 stops Los Angeles Los Angeles Charlotte Douglas

$1,145American Airlines

Tue, Oct 27 - Wed, Nov 11

7:20 pm - 8:50 amSTL Lambert-St Louis-MEL Melbourne

45h 30m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

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

27h 59m2 stops Los Angeles Los Angeles Salt Lake City

$1,163Delta

Tue, Oct 20 - Tue, Nov 3

7:20 pm - 8:50 amSTL Lambert-St Louis-MEL Melbourne

45h 30m2 stops Atlanta Hartsfield-Jackson Los Angeles Los Angeles

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

27h 59m2 stops Los Angeles Los Angeles Salt Lake City

$1,164Delta

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

$1,268United 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

11:55 am - 6:43 pmMEL Melbourne-STL Lambert-St Louis

22h 48m1 stop San Francisco

$1,268United Airlines

Tue, Oct 6 - Tue, Oct 13

12:47 pm - 6:30 amSTL Lambert-St Louis-BNE Brisbane

26h 43m1 stop Dallas/Fort Worth

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

25h 49m1 stop Los Angeles Los Angeles

$1,293Qantas Airways

Tue, Oct 27 - Fri, Oct 30

7:01 pm - 6:30 amSTL Lambert-St Louis-BNE Brisbane

19h 29m1 stop Dallas/Fort Worth

9:40 am - 12:32 pmBNE Brisbane-STL Lambert-St Louis

18h 52m1 stop Dallas/Fort Worth

$1,293Qantas Airways

Sun, Feb 14 - Sat, Feb 20

4:05 pm - 8:20 pmSTL Lambert-St Louis-PER Perth

62h 15m3 stops Toronto Pearson Intl Vancouver Intl Sydney Kingsford Smith

3:15 pm - 3:26 pmPER Perth-STL Lambert-St Louis

62h 11m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,626Air Canada

Sun, Nov 1 - Mon, Nov 16

4:05 pm - 8:20 pmSTL Lambert-St Louis-PER Perth

62h 15m3 stops Toronto Pearson Intl Vancouver Intl Sydney Kingsford Smith

3:15 pm - 3:26 pmPER Perth-STL Lambert-St Louis

62h 11m3 stops Sydney Kingsford Smith Vancouver Intl Toronto Pearson Intl

$1,627Air Canada

Sun, Nov 1 - Mon, Nov 16

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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

Nov 22

STL11:00 amLambert-St Louis

28h 35m

2 stops

SYD8:35 amSydney Kingsford Smith

Nov 30

SYD7:25 pmSydney Kingsford Smith

43h 41m

2 stops

STL10:06 pmLambert-St Louis

$1,303

Air New Zealand

Oct 13

STL3:12 pmLambert-St Louis

38h 38m

2 stops

SYD9:50 pmSydney Kingsford Smith

Nov 13

SYD9:55 amSydney Kingsford Smith

29h 31m

2 stops

STL10:26 pmLambert-St Louis

$1,304

Air New Zealand

Nov 23

STL8:30 amLambert-St Louis

31h 05m

2 stops

SYD8:35 amSydney Kingsford Smith

Nov 30

SYD7:25 pmSydney Kingsford Smith

43h 41m

2 stops

STL10:06 pmLambert-St Louis

$1,350

Delta flights from St. Louis to Australia

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

Delta

Oct 20

STL7:20 pmLambert-St Louis

45h 30m

2 stops

MEL8:50 amMelbourne

Nov 3

MEL10:10 amMelbourne

27h 59m

2 stops

STL9:09 pmLambert-St Louis

$1,163

Delta

Oct 20

STL7:20 pmLambert-St Louis

45h 30m

2 stops

MEL8:50 amMelbourne

Nov 3

MEL10:10 amMelbourne

27h 59m

2 stops

STL9:09 pmLambert-St Louis

$1,164

Delta

Oct 3

STL10:29 amLambert-St Louis

29h 21m

2 stops

SYD6:50 amSydney Kingsford Smith

Oct 10

SYD10:15 amSydney Kingsford Smith

29h 06m

2 stops

STL11:21 pmLambert-St Louis

$1,434

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/27

5:40 am-5:00 am

1 stop31h 20m

Melbourne

Wed 11/11

10:45 pm-8:07 am

2 stops26h 22m

$1,145

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/27

10:22 am-5:00 am

2 stops26h 38m

Melbourne

Wed 11/11

10:45 pm-8:07 am

2 stops26h 22m

$1,145

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/20

7:20 pm-8:50 am

2 stops45h 30m

Melbourne

Tue 11/3

10:10 am-9:09 pm

2 stops27h 59m

$1,163

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/20

7:20 pm-8:50 am

2 stops45h 30m

Melbourne

Tue 11/3

10:10 am-9:09 pm

2 stops27h 59m

$1,164

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/20

11:10 am-9:15 am

2 stops30h 05m

Melbourne

Tue 11/3

12:45 pm-6:05 pm

1 stop22h 20m

$1,268

St. LouisMelbourne

STL Lambert-St Louis - MEL Melbourne

STLMEL

Lambert-St Louis

Tue 10/6

11:10 am-9:15 am

2 stops30h 05m

Melbourne

Tue 10/13

11:55 am-6:43 pm

1 stop22h 48m

$1,268

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Tue 10/27

12:47 pm-6:30 am

1 stop26h 43m

Brisbane

Fri 10/30

1:10 pm-11:59 pm

1 stop25h 49m

$1,293

Quickest round-trip

St. LouisBrisbane

STL Lambert-St Louis - BNE Brisbane

STLBNE

Lambert-St Louis

Sun 2/14

7:01 pm-6:30 am

1 stop19h 29m

Brisbane

Sat 2/20

9:40 am-12:32 pm

1 stop18h 52m

$1,293

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

4:05 pm-8:20 pm

3 stops62h 15m

Perth

Mon 11/16

3:15 pm-3:26 pm

3 stops62h 11m

$1,626

St. LouisPerth

STL Lambert-St Louis - PER Perth

STLPER

Lambert-St Louis

Sun 11/1

4:05 pm-8:20 pm

3 stops62h 15m

Perth

Mon 11/16

3:15 pm-3:26 pm

3 stops62h 11m

$1,627

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

Best Price Found	$595
Fastest flight time	21h 06m
Direct flights	None

The best one-way flight to Australia from St. Louis in the past 72 hours is $595. The best round-trip flight deal from St. Louis to Australia found on momondo in the last 72 hours is $1,145.

The fastest flight from St. Louis to Australia takes 21h 06m

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 August 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 1,085 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $894	Free Cancellation	Rating 7.1 11,519 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.4 10,115 reviews	Search United Airlines flights
American Airlines	PriceFrom $1,086	Free Cancellation	Rating 7.1 11,989 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.