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Cheap flights from St. Louis to Australia from $545

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Australia departing on 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:45 pm - 8:45 amSTL-BNE
26h 00m2 stops
Multiple Airlines Logo
10:45 am - 3:29 pmBNE-STL
44h 44m2 stops
$904Multiple Airlines
Find Deal
dom, fev 1 - dom, fev 15
Multiple Airlines Logo
2:45 pm - 8:45 amSTL-BNE
26h 00m2 stops
Multiple Airlines Logo
6:10 am - 3:29 pmBNE-STL
49h 19m3 stops
$922Multiple Airlines
Find Deal
dom, fev 1 - dom, fev 15
Multiple Airlines Logo
2:45 pm - 8:45 amSTL-BNE
26h 00m2 stops
Multiple Airlines Logo
10:45 am - 3:29 pmBNE-STL
44h 44m2 stops
$932Multiple Airlines
Find Deal
dom, fev 1 - dom, fev 15
Qantas Airways Logo
5:04 pm - 8:20 amSTL-MEL
46h 16m2 stops
Qantas Airways Logo
12:00 pm - 11:48 pmMEL-STL
28h 48m1 stop
$964Qantas Airways
Find Deal
seg, fev 2 - sáb, fev 14
Qantas Airways Logo
5:04 pm - 10:45 pmSTL-MEL
36h 41m2 stops
Qantas Airways Logo
12:00 pm - 11:48 pmMEL-STL
28h 48m1 stop
$993Qantas Airways
Find Deal
seg, fev 2 - sáb, fev 14
American Airlines Logo
7:04 am - 5:00 amSTL-BNE
29h 56m1 stop
American Airlines Logo
7:40 pm - 11:48 pmBNE-STL
20h 08m1 stop
$1,014American Airlines
Find Deal
dom, fev 1 - dom, fev 15
American Airlines Logo
7:04 am - 5:00 amSTL-BNE
29h 56m1 stop
American Airlines Logo
7:40 pm - 11:48 pmBNE-STL
20h 08m1 stop
$1,015American Airlines
Find Deal
dom, fev 1 - dom, fev 15
Air Canada Logo
8:45 am - 8:45 amSTL-BNE
32h 00m2 stops
Air Canada Logo
10:45 am - 3:29 pmBNE-STL
44h 44m2 stops
$1,017Air Canada
Find Deal
seg, fev 2 - qua, fev 18
Air Canada Logo
4:05 pm - 8:45 amSTL-BNE
48h 40m2 stops
Air Canada Logo
10:45 am - 3:29 pmBNE-STL
44h 44m2 stops
$1,019Air Canada
Find Deal
sáb, jan 31 - dom, fev 15
United Airlines Logo
6:00 am - 2:55 pmSTL-CNS
40h 55m2 stops
United Airlines Logo
6:00 am - 10:30 pmCNS-STL
32h 30m2 stops
$5,520United Airlines
Find Deal
sex, dez 26 - sex, jan 2

Qantas Airways flights from St. Louis to Australia

Our best Qantas Airways deals on St. Louis to Australia flight tickets
Qantas Airways
Feb 2
STL5:04 pmLambert-St Louis
46h 16m
2 stops
MEL8:20 amMelbourne
Feb 14
MEL12:00 pmMelbourne
28h 48m
1 stop
STL11:48 pmLambert-St Louis
$964
Find similar
Qantas Airways
Feb 2
STL5:04 pmLambert-St Louis
36h 41m
2 stops
MEL10:45 pmMelbourne
Feb 14
MEL12:00 pmMelbourne
28h 48m
1 stop
STL11:48 pmLambert-St Louis
$993
Find similar
Qantas Airways
Nov 22
STL6:13 pmLambert-St Louis
20h 17m
1 stop
BNE6:30 amBrisbane
Dec 26
BNE9:40 amBrisbane
23h 30m
1 stop
STL5:10 pmLambert-St Louis
$1,046
Find similar

American Airlines flights from St. Louis to Australia

Our best American Airlines deals on St. Louis to Australia flight tickets
American Airlines
Feb 1
STL7:04 amLambert-St Louis
29h 56m
1 stop
BNE5:00 amBrisbane
Feb 15
BNE7:40 pmBrisbane
20h 08m
1 stop
STL11:48 pmLambert-St Louis
$1,014
Find similar
American Airlines
Feb 1
STL7:04 amLambert-St Louis
29h 56m
1 stop
BNE5:00 amBrisbane
Feb 15
BNE7:40 pmBrisbane
20h 08m
1 stop
STL11:48 pmLambert-St Louis
$1,015
Find similar
American Airlines
Nov 22
STL7:00 amLambert-St Louis
30h 00m
1 stop
BNE5:00 amBrisbane
Dec 26
BNE9:40 amBrisbane
23h 30m
1 stop
STL5:10 pmLambert-St Louis
$1,021
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated novembro 12, 2025.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 2/1

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

dom 2/15

10:45 am-3:29 pm

2 stops44h 44m

$904

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 2/1

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

dom 2/15

6:10 am-3:29 pm

3 stops49h 19m

$922

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 2/1

2:45 pm-8:45 am

2 stops26h 00m

Brisbane

dom 2/15

10:45 am-3:29 pm

2 stops44h 44m

$932

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

seg 2/2

5:04 pm-8:20 am

2 stops46h 16m

Melbourne

sáb 2/14

12:00 pm-11:48 pm

1 stop28h 48m

$964

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

seg 2/2

5:04 pm-10:45 pm

2 stops36h 41m

Melbourne

sáb 2/14

12:00 pm-11:48 pm

1 stop28h 48m

$993

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 2/1

7:04 am-5:00 am

1 stop29h 56m

Brisbane

dom 2/15

7:40 pm-11:48 pm

1 stop20h 08m

$1,014

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

dom 2/1

7:04 am-5:00 am

1 stop29h 56m

Brisbane

dom 2/15

7:40 pm-11:48 pm

1 stop20h 08m

$1,015

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

seg 2/2

8:45 am-8:45 am

2 stops32h 00m

Brisbane

qua 2/18

10:45 am-3:29 pm

2 stops44h 44m

$1,017

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

sáb 1/31

4:05 pm-8:45 am

2 stops48h 40m

Brisbane

dom 2/15

10:45 am-3:29 pm

2 stops44h 44m

$1,019

St. LouisCairns

STL - CNS

STLCNS

Lambert-St Louis

sex 12/26

6:00 am-2:55 pm

2 stops40h 55m

Cairns

sex 1/2

6:00 am-10:30 pm

2 stops32h 30m

$5,520

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Australia from

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

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 $1,275. 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.

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

You could potentially save up to 1% 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

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?

  • 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 CanadaPriceFrom $897Free CancellationRating
7.1
10,443 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $975Free CancellationRating
7.5
933 reviews
Search Qantas Airways flights
Fiji AirwaysPriceFrom $1,132Free CancellationRating
8.1
209 reviews
Search Fiji Airways flights
United AirlinesPriceFrom $1,165Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
Air New ZealandPriceFrom $1,259Free CancellationRating
8.0
526 reviews
Search Air New Zealand flights
American AirlinesPriceFrom $1,260Free CancellationRating
7.2
11,049 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.

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Find better results for your trip to Australia

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