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Look for other cheap flights to Lambert-St Louis

$743 Cheap flights to St. Louis

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to St. Louis departing on 4/9. 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
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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Multiple Airlines Logo
13:15 - 11:17SYD  Sydney Kingsford Smith-STL Lambert-St Louis
37h 02m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl
Multiple Airlines Logo
12:17 - 22:25STL  Lambert-St Louis-SYD Sydney Kingsford Smith
43h 08m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Nadi
$1,320Multiple Airlines
Wed, 9 Sep - Sat, 19 Sep
Multiple Airlines Logo
13:15 - 11:17SYD  Sydney Kingsford Smith-STL Lambert-St Louis
37h 02m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl
Multiple Airlines Logo
12:17 - 22:25STL  Lambert-St Louis-SYD Sydney Kingsford Smith
43h 08m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Nadi
$1,332Multiple Airlines
Wed, 9 Sep - Sat, 19 Sep
Air Canada Logo
10:15 - 18:41BNE  Brisbane-STL Lambert-St Louis
47h 26m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
12:10 - 07:05STL  Lambert-St Louis-BNE Brisbane
27h 55m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$1,388Air Canada
Thu, 17 Sep - Thu, 24 Sep
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
$1,437Air Canada
Thu, 5 Nov - Mon, 9 Nov
United Airlines Logo
09:20 - 14:13SYD  Sydney Kingsford Smith-STL Lambert-St Louis
21h 53m1 stop Houston George Bush Intcntl
United Airlines Logo
17:55 - 07:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
44h 05m1 stop Houston George Bush Intcntl
$1,505United Airlines
Thu, 12 Nov - Mon, 16 Nov
United Airlines Logo
09:20 - 18:38SYD  Sydney Kingsford Smith-STL Lambert-St Louis
26h 18m1 stop Houston George Bush Intcntl
United Airlines Logo
17:55 - 07:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
44h 05m1 stop Houston George Bush Intcntl
$1,510United Airlines
Thu, 12 Nov - Mon, 16 Nov
Qantas Airways Logo
09:10 - 23:30SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 20m1 stop Los Angeles Los Angeles
Qantas Airways Logo
06:20 - 07:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 45m1 stop Los Angeles Los Angeles
$1,516Qantas Airways
Wed, 9 Sep - Sat, 19 Sep
Qantas Airways Logo
09:10 - 22:59SYD  Sydney Kingsford Smith-STL Lambert-St Louis
28h 49m1 stop Los Angeles Los Angeles
Qantas Airways Logo
06:30 - 07:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 35m1 stop Los Angeles Los Angeles
$1,523Qantas Airways
Fri, 4 Sep - Wed, 23 Sep
American Airlines Logo
09:10 - 23:30SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 20m1 stop Los Angeles Los Angeles
American Airlines Logo
13:49 - 07:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
26h 16m2 stops Chicago O'Hare Intl Los Angeles Los Angeles
$1,553American Airlines
Wed, 9 Sep - Sat, 19 Sep
American Airlines Logo
09:10 - 16:48SYD  Sydney Kingsford Smith-STL Lambert-St Louis
22h 38m2 stops Los Angeles Los Angeles Chicago O'Hare Intl
American Airlines Logo
15:34 - 07:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 31m2 stops Dallas/Fort Worth Los Angeles Los Angeles
$1,553American Airlines
Wed, 9 Sep - Sat, 19 Sep

momondo Fare Finder

 
Locate flights to Lambert-St Louis that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 78,305 searches and data was last updated on 6 August 2026.
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 9/9

13:15-11:17

3 stops37h 02m

Lambert-St Louis

Sat 19/9

12:17-22:25

3 stops43h 08m

$1,320

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/9

13:15-11:17

3 stops37h 02m

Lambert-St Louis

Sat 19/9

12:17-22:25

3 stops43h 08m

$1,332

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Thu 17/9

10:15-18:41

2 stops47h 26m

Lambert-St Louis

Thu 24/9

12:10-07:05

2 stops27h 55m

$1,388

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

$1,436

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,505

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-18:38

1 stop26h 18m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,510

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/9

09:10-23:30

1 stop29h 20m

Lambert-St Louis

Sat 19/9

06:20-07:05

1 stop33h 45m

$1,516

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Fri 4/9

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Wed 23/9

06:30-07:05

1 stop33h 35m

$1,523

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/9

09:10-23:30

1 stop29h 20m

Lambert-St Louis

Sat 19/9

13:49-07:05

2 stops26h 16m

$1,553
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 9/9

09:10-16:48

2 stops22h 38m

Lambert-St Louis

Sat 19/9

15:34-07:05

2 stops24h 31m

$1,553

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 $1,473. 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 $1,503.

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 SYDNEYSeptember18% cheaperFlying from Sydney to St. Louis costs on average just $1,473 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYApril29% more expensiveIt costs about $2,307 for flights to St. Louis from Sydney in April
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEYDecember700% 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

$743

Best Round-Trip Price

$1,320

Fastest flight time

43h 35m
The best one-way flight price to St. Louis from Australia in the last 5 days is $743 (Sydney Kingsford Smith to Lambert-St Louis).
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The best return flight price to St. Louis from Australia in the last 5 days is $1,320 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The fastest flight to St. Louis from Australia takes 43h 35m (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals

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 4 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

Popular routes according to searches in the past day on momondo
Melbourne to Lambert-St Louis Flightsfrom $1,127
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $939
Brisbane to Lambert-St Louis Flightsfrom $1,098
Devonport to Lambert-St Louis Flightsfrom $2,343