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$890 Cheap flights to St. Louis

1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Australia to St. Louis

Cheap return flights

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American Airlines Logo
10:10 - 10:50SYD  Sydney Kingsford Smith-STL Lambert-St Louis
40h 40m2 stops Los Angeles Chicago O'Hare Intl
American Airlines Logo
15:20 - 09:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 40m2 stops Dallas/Fort Worth Los Angeles
$1,450American Airlines
Wed, 21 Oct - Sat, 24 Oct
American Airlines Logo
10:10 - 10:50SYD  Sydney Kingsford Smith-STL Lambert-St Louis
40h 40m2 stops Los Angeles Chicago O'Hare Intl
American Airlines Logo
15:20 - 09:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 40m2 stops Dallas/Fort Worth Los Angeles
$1,456American Airlines
Wed, 21 Oct - Sat, 24 Oct
American Airlines Logo
10:10 - 10:50SYD  Sydney Kingsford Smith-STL Lambert-St Louis
40h 40m2 stops Los Angeles Chicago O'Hare Intl
American Airlines Logo
15:20 - 09:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 40m2 stops Dallas/Fort Worth Los Angeles
$1,461American Airlines
Wed, 21 Oct - Sat, 24 Oct
Air Canada Logo
10:45 - 15:26BNE  Brisbane-STL Lambert-St Louis
44h 41m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
16:39 - 08:45STL  Lambert-St Louis-BNE Brisbane
24h 06m2 stops Denver Intl Vancouver Intl
$1,500Air Canada
Thu, 5 Nov - Mon, 9 Nov
Air Canada Logo
10:45 - 15:26BNE  Brisbane-STL Lambert-St Louis
44h 41m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
13:40 - 08:45STL  Lambert-St Louis-BNE Brisbane
27h 05m2 stops Denver Intl Vancouver Intl
$1,503Air Canada
Thu, 5 Nov - Mon, 9 Nov
Air Canada Logo
10:45 - 15:26BNE  Brisbane-STL Lambert-St Louis
44h 41m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
16:39 - 08:45STL  Lambert-St Louis-BNE Brisbane
24h 06m2 stops Denver Intl Vancouver Intl
$1,506Air Canada
Thu, 5 Nov - Mon, 9 Nov
Qantas Airways Logo
13:00 - 18:20SYD  Sydney Kingsford Smith-STL Lambert-St Louis
21h 20m1 stop Dallas/Fort Worth
Qantas Airways Logo
14:54 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 01m1 stop Dallas/Fort Worth
$1,507Qantas Airways
Mon, 19 Oct - Wed, 11 Nov
United Airlines Logo
11:20 - 18:05SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 45m2 stops Los Angeles San Francisco
United Airlines Logo
13:08 - 09:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
26h 57m2 stops Chicago O'Hare Intl Los Angeles
$1,584United Airlines
Sun, 15 Nov - Sun, 22 Nov
United Airlines Logo
09:15 - 22:26SYD  Sydney Kingsford Smith-STL Lambert-St Louis
30h 11m1 stop Houston George Bush Intcntl
United Airlines Logo
19:05 - 09:20STL  Lambert-St Louis-SYD Sydney Kingsford Smith
21h 15m1 stop San Francisco
$1,584United Airlines
Sun, 15 Nov - Sun, 22 Nov
Qantas Airways Logo
22:45 - 18:11PER  Perth-STL Lambert-St Louis
32h 26m2 stops Melbourne Dallas/Fort Worth
Qantas Airways Logo
06:38 - 11:15STL  Lambert-St Louis-PER Perth
39h 37m2 stops Los Angeles Melbourne
$2,636Qantas Airways
Mon, 15 Mar - Tue, 30 Mar

momondo Fare Finder

 
Use the filters below to find and compare flights to St. Louis that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-10:50

2 stops40h 40m

Lambert-St Louis

Sat 24/10

15:20-09:00

2 stops25h 40m

$1,450

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-10:50

2 stops40h 40m

Lambert-St Louis

Sat 24/10

15:20-09:00

2 stops25h 40m

$1,456

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-10:50

2 stops40h 40m

Lambert-St Louis

Sat 24/10

15:20-09:00

2 stops25h 40m

$1,461

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 5/11

10:45-15:26

2 stops44h 41m

Lambert-St Louis

Mon 9/11

16:39-08:45

2 stops24h 06m

$1,500

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 5/11

10:45-15:26

2 stops44h 41m

Lambert-St Louis

Mon 9/11

13:40-08:45

2 stops27h 05m

$1,503

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 5/11

10:45-15:26

2 stops44h 41m

Lambert-St Louis

Mon 9/11

16:39-08:45

2 stops24h 06m

$1,506
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 19/10

13:00-18:20

1 stop21h 20m

Lambert-St Louis

Wed 11/11

14:54-06:55

1 stop23h 01m

$1,507

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sun 15/11

11:20-18:05

2 stops23h 45m

Lambert-St Louis

Sun 22/11

13:08-09:05

2 stops26h 57m

$1,584

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sun 15/11

09:15-22:26

1 stop30h 11m

Lambert-St Louis

Sun 22/11

19:05-09:20

1 stop21h 15m

$1,584

PerthSt. Louis

PER Perth - STL Lambert-St Louis

PERSTL

Perth

Mon 15/3

22:45-18:11

2 stops32h 26m

Lambert-St Louis

Tue 30/3

06:38-11:15

2 stops39h 37m

$2,636

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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St. Louis flights insights and trends

Explore insights for your St. Louis flight to craft the best travel plan

What is the cheapest month to fly to St. Louis?

The month of July is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,526. If you aren’t able to travel to St. Louis during the month of July, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,532.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

Cheap St. Louis flight deals and tips

Summary info about St. Louis flight prices, duration and airlines

Best One-Way Price

$890

Best Round-Trip Price

$1,450

Fastest flight time

26h 49m

Popular in

April
The best one-way flight price to St. Louis from Australia in the last 5 days is $890 (Melbourne to Lambert-St Louis).
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The best return flight price to St. Louis from Australia in the last 5 days is $1,450 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The fastest flight to St. Louis from Australia takes 26h 49m (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
April has the highest demand for flights to St. Louis, with a 3% price increase on average.
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Frequently asked questions about flying to St. Louis

Is there an alternative airport near St. Louis?

Those flying to St. Louis could potentially find better pricing at Belleville Airport (35 km from St. Louis city centre), Marion Williamson County Airport (142 km from St. Louis city centre) or Springfield Capital Airport (142 km from St. Louis city centre) depending on the month and departure airport.

When did momondo last update prices for flights to Lambert-St Louis Airport?

Prices for flights to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights to Lambert-St Louis Airport?

As of October 2026, there are 3 operators available to choose from for flights to Lambert-St Louis Airport.

How old do you have to be to fly to Lambert-St Louis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Collinsville
St. Charles

Why use momondo?

Why should I use momondo to find a flight deal to St. Louis?

Finding the right flight to St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights to St. Louis with flexible booking policies on momondo?

Flights to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to St. Louis.

I’m not ready to book a flight to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to St. Louis

Popular Flights to St. Louis

Melbourne to Lambert-St Louis Flightsfrom $1,106
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,047
Brisbane to Lambert-St Louis Flightsfrom $2,052
Devonport to Lambert-St Louis Flightsfrom $2,389