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

ANA, United Airlines, and Air Canada are the most popular carriers operating from Lambert-St Louis to Australia

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 45% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 6 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 6 operators available for flights from Lambert-St Louis Airport to Australia as of October 2025.

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.

$545 Cheap Flights from St. Louis to Australia in 2025/26

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Find the cheapest flights from St. Louis to Australia

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One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:43 pm - 8:45 amSTL-BNE

48h 02m2 stops

10:45 am - 10:22 pmBNE-STL

27h 37m2 stops

$1,070Air Canada

Find Deal

sáb., nov. 22 - vie., dic. 26

6:15 am - 7:30 amSTL-BNE

33h 15m2 stops

11:40 am - 4:27 pmBNE-STL

20h 47m1 stop

$1,091United Airlines

Find Deal

vie., nov. 14 - lun., nov. 24

7:00 am - 5:00 amSTL-BNE

30h 00m1 stop

7:40 pm - 11:42 pmBNE-STL

20h 02m1 stop

$1,184American Airlines

Find Deal

vie., nov. 14 - lun., nov. 24

9:25 am - 6:30 amSTL-BNE

29h 05m1 stop

7:40 pm - 11:09 pmBNE-STL

18h 29m1 stop

$1,191American Airlines

Find Deal

dom., ene. 25 - dom., mar. 8

7:00 am - 9:50 amSTL-SYD

33h 50m2 stops

2:05 pm - 4:32 pmSYD-STL

19h 27m1 stop

$1,241Qantas Airways

Find Deal

mié., nov. 12 - dom., nov. 23

7:00 am - 10:55 amSTL-SYD

34h 55m2 stops

2:05 pm - 4:32 pmSYD-STL

19h 27m1 stop

$1,242Qantas Airways

Find Deal

mié., nov. 12 - dom., nov. 23

5:58 pm - 12:45 pmSTL-MEL

25h 47m2 stops

1:55 pm - 7:27 pmMEL-STL

22h 32m2 stops

$1,446Fiji Airways

Find Deal

mar., nov. 11 - jue., dic. 4

6:00 am - 10:55 amSTL-MEL

35h 55m2 stops

6:55 pm - 10:06 pmMEL-STL

42h 11m2 stops

$1,470Air New Zealand

Find Deal

vie., feb. 27 - dom., jun. 28

5:58 pm - 12:45 pmSTL-MEL

25h 47m2 stops

1:55 pm - 7:27 pmMEL-STL

22h 32m2 stops

$1,481Fiji Airways

Find Deal

mar., nov. 11 - jue., dic. 4

5:30 pm - 4:55 pmSTL-BNE

31h 25m2 stops

8:10 am - 10:01 pmBNE-STL

29h 51m3 stops

$2,690Air New Zealand

Find Deal

vie., dic. 12 - vie., dic. 19

Air Canada flights from St. Louis to Australia

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

Air Canada

Nov 22

STL4:43 pmLambert-St Louis

48h 02m

2 stops

BNE8:45 amBrisbane

Dec 26

BNE10:45 amBrisbane

27h 37m

2 stops

STL10:22 pmLambert-St Louis

$1,070

Find similar

Air Canada

Feb 16

STL2:45 pmLambert-St Louis

26h 00m

2 stops

BNE8:45 amBrisbane

Feb 20

BNE10:45 amBrisbane

44h 44m

2 stops

STL3:29 pmLambert-St Louis

$1,103

Find similar

Air Canada

Apr 19

STL4:05 pmLambert-St Louis

48h 15m

2 stops

SYD7:20 amSydney Kingsford Smith

Apr 25

SYD9:20 amSydney Kingsford Smith

45h 04m

2 stops

STL3:24 pmLambert-St Louis

$1,264

Find similar

Qantas Airways flights from St. Louis to Australia

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

Qantas Airways

Nov 12

STL7:00 amLambert-St Louis

33h 50m

2 stops

SYD9:50 amSydney Kingsford Smith

Nov 23

SYD2:05 pmSydney Kingsford Smith

19h 27m

1 stop

STL4:32 pmLambert-St Louis

$1,241

Find similar

Qantas Airways

Nov 12

STL7:00 amLambert-St Louis

34h 55m

2 stops

SYD10:55 amSydney Kingsford Smith

Nov 23

SYD2:05 pmSydney Kingsford Smith

19h 27m

1 stop

STL4:32 pmLambert-St Louis

$1,242

Find similar

Qantas Airways

Nov 5

STL1:20 pmLambert-St Louis

24h 35m

1 stop

SYD6:55 amSydney Kingsford Smith

Nov 23

SYD2:05 pmSydney Kingsford Smith

19h 27m

1 stop

STL4:32 pmLambert-St Louis

$1,275

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

sáb. 11/22

4:43 pm-8:45 am

2 stops48h 02m

Brisbane

vie. 12/26

10:45 am-10:22 pm

2 stops27h 37m

$1,070

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

vie. 11/14

6:15 am-7:30 am

2 stops33h 15m

Brisbane

lun. 11/24

11:40 am-4:27 pm

1 stop20h 47m

$1,091

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

vie. 11/14

7:00 am-5:00 am

1 stop30h 00m

Brisbane

lun. 11/24

7:40 pm-11:42 pm

1 stop20h 02m

$1,184

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom. 1/25

9:25 am-6:30 am

1 stop29h 05m

Brisbane

dom. 3/8

7:40 pm-11:09 pm

1 stop18h 29m

$1,191

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

mié. 11/12

7:00 am-9:50 am

2 stops33h 50m

Sydney Kingsford Smith

dom. 11/23

2:05 pm-4:32 pm

1 stop19h 27m

$1,241

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

mié. 11/12

7:00 am-10:55 am

2 stops34h 55m

Sydney Kingsford Smith

dom. 11/23

2:05 pm-4:32 pm

1 stop19h 27m

$1,242

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

mar. 11/11

5:58 pm-12:45 pm

2 stops25h 47m

Melbourne

jue. 12/4

1:55 pm-7:27 pm

2 stops22h 32m

$1,446

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

vie. 2/27

6:00 am-10:55 am

2 stops35h 55m

Melbourne

dom. 6/28

6:55 pm-10:06 pm

2 stops42h 11m

$1,470

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

mar. 11/11

5:58 pm-12:45 pm

2 stops25h 47m

Melbourne

jue. 12/4

1:55 pm-7:27 pm

2 stops22h 32m

$1,481

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

vie. 12/12

5:30 pm-4:55 pm

2 stops31h 25m

Brisbane

vie. 12/19

8:10 am-10:01 pm

3 stops29h 51m

$2,690

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 $1,266. If you aren’t able to travel during the month of August, then book flights to Australia from St. Louis during October instead. Flights to Australia in October, while not as cheap as those in August, still average around $1,331.

What is the cheapest day to depart on your flight to Australia?

The cheapest day to depart from St. Louis to Australia is on a Wednesday. Travelers who choose to depart for Australia on a Wednesday will often find tickets for as low as $1,392. On the other hand, Saturday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,518.

What is the cheapest time of day to depart on your flight to Australia?

Flying to Australia from St. Louis in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,440 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,882 on average. Flights to Australia from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $1,454 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 $909 on momondo.

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

Direct flights	None

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 6 operators available for flights from Lambert-St Louis Airport to Australia as of October 2025.
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 10,372 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $975	Free Cancellation	Rating 7.5 925 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $1,029	Free Cancellation	Rating 7.4 8,999 reviews	Search United Airlines flights
Fiji Airways	PriceFrom $1,132	Free Cancellation	Rating 8.0 208 reviews	Search Fiji Airways flights
Air New Zealand	PriceFrom $1,259	Free Cancellation	Rating 8.0 520 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $1,260	Free Cancellation	Rating 7.2 11,032 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.