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$853 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
11:15 - 23:45SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 30m1 stop Los Angeles Los Angeles
American Airlines Logo
08:29 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
29h 26m1 stop Dallas/Fort Worth
$1,369American Airlines
Tue, 17 Nov - Tue, 1 Dec
American Airlines Logo
11:15 - 23:45SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 30m1 stop Los Angeles Los Angeles
American Airlines Logo
13:20 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 35m2 stops Chicago O'Hare Intl Dallas/Fort Worth
$1,400American Airlines
Tue, 17 Nov - Tue, 1 Dec
American Airlines Logo
10:10 - 13:44SYD  Sydney Kingsford Smith-STL Lambert-St Louis
43h 34m2 stops Los Angeles Los Angeles Phoenix Sky Harbor Intl
American Airlines Logo
15:20 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 35m1 stop Dallas/Fort Worth
$1,503American Airlines
Wed, 21 Oct - Sat, 24 Oct
United Airlines Logo
11:50 - 18:09SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 19m2 stops San Francisco Chicago O'Hare Intl
United Airlines Logo
13:08 - 09:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
26h 57m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles Los Angeles
$1,743United Airlines
Tue, 17 Nov - Tue, 1 Dec
United Airlines Logo
11:50 - 16:57SYD  Sydney Kingsford Smith-STL Lambert-St Louis
22h 07m2 stops San Francisco Denver Intl
United Airlines Logo
13:15 - 09:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
26h 50m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles Los Angeles
$1,745United Airlines
Tue, 17 Nov - Tue, 1 Dec
Multiple Airlines Logo
10:30 - 11:17BNE  Brisbane-STL Lambert-St Louis
39h 47m3 stops San Francisco Los Angeles Los Angeles Las Vegas Harry Reid Intl
Multiple Airlines Logo
12:17 - 20:30STL  Lambert-St Louis-BNE Brisbane
41h 13m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Sydney Kingsford Smith
$1,769Multiple Airlines
Wed, 16 Sep - Tue, 22 Sep
Multiple Airlines Logo
10:30 - 11:17BNE  Brisbane-STL Lambert-St Louis
39h 47m3 stops San Francisco Los Angeles Los Angeles Las Vegas Harry Reid Intl
Multiple Airlines Logo
12:17 - 11:30STL  Lambert-St Louis-BNE Brisbane
32h 13m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Sydney Kingsford Smith
$1,769Multiple Airlines
Wed, 16 Sep - Sat, 19 Sep
United Airlines Logo
11:30 - 16:26MEL  Melbourne-STL Lambert-St Louis
21h 56m2 stops Los Angeles Los Angeles Denver Intl
United Airlines Logo
09:40 - 09:30STL  Lambert-St Louis-MEL Melbourne
30h 50m2 stops Chicago O'Hare Intl Los Angeles Los Angeles
$1,791United Airlines
Tue, 8 Dec - Tue, 12 Jan
Qantas Airways Logo
09:45 - 23:30MEL  Melbourne-STL Lambert-St Louis
29h 45m1 stop Los Angeles Los Angeles
Qantas Airways Logo
10:12 - 05:00STL  Lambert-St Louis-MEL Melbourne
26h 48m1 stop Dallas/Fort Worth
$2,151Qantas Airways
Sun, 4 Oct - Wed, 14 Oct
Qantas Airways Logo
10:10 - 23:30SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 20m1 stop Los Angeles Los Angeles
Qantas Airways Logo
06:04 - 10:30STL  Lambert-St Louis-SYD Sydney Kingsford Smith
36h 26m2 stops Los Angeles Los Angeles Melbourne
$2,373Qantas Airways
Sun, 4 Oct - Sun, 11 Oct

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

Tue 17/11

11:15-23:45

1 stop29h 30m

Lambert-St Louis

Tue 1/12

08:29-06:55

1 stop29h 26m

$1,369

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:15-23:45

1 stop29h 30m

Lambert-St Louis

Tue 1/12

13:20-06:55

2 stops24h 35m

$1,400

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-13:44

2 stops43h 34m

Lambert-St Louis

Sat 24/10

15:20-06:55

1 stop23h 35m

$1,503

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:50-18:09

2 stops23h 19m

Lambert-St Louis

Tue 1/12

13:08-09:05

3 stops26h 57m

$1,743
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:50-16:57

2 stops22h 07m

Lambert-St Louis

Tue 1/12

13:15-09:05

3 stops26h 50m

$1,745

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Wed 16/9

10:30-11:17

3 stops39h 47m

Lambert-St Louis

Tue 22/9

12:17-20:30

3 stops41h 13m

$1,769

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Wed 16/9

10:30-11:17

3 stops39h 47m

Lambert-St Louis

Sat 19/9

12:17-11:30

3 stops32h 13m

$1,769

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Tue 8/12

11:30-16:26

2 stops21h 56m

Lambert-St Louis

Tue 12/1

09:40-09:30

2 stops30h 50m

$1,791

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Sun 4/10

09:45-23:30

1 stop29h 45m

Lambert-St Louis

Wed 14/10

10:12-05:00

1 stop26h 48m

$2,151

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sun 4/10

10:10-23:30

1 stop29h 20m

Lambert-St Louis

Sun 11/10

06:04-10:30

2 stops36h 26m

$2,373

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 September is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,449. If you aren’t able to travel to St. Louis during the month of September, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,478.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport
Find flights from Sydney to St. Louis
CHEAPEST MONTH TO FLY TO ST. LOUIS FROM SYDNEYSeptember17% cheaperFlying from Sydney to St. Louis costs on average just $1,449 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYApril30% more expensiveIt costs about $2,268 for flights to St. Louis from Sydney in April
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEYDecember1,025% more users visitedMore momondo users searched in flights to St. Louis from Sydney in December than any other month

Cheap St. Louis flight deals and tips

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

Best One-Way Price

$853

Best Round-Trip Price

$1,369

Fastest flight time

23h 55m
The best one-way flight price to St. Louis from Australia in the last 5 days is $853 (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 $1,369 (Sydney Kingsford Smith to Lambert-St Louis).
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The fastest flight to St. Louis from Australia takes 23h 55m (Sydney Kingsford Smith to Lambert-St Louis).
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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 August 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 $1,288
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,288
Devonport to Lambert-St Louis Flightsfrom $2,043
Brisbane to Lambert-St Louis Flightsfrom $2,068