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$821 Cheap flights to St. Louis

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Find the cheapest flights from Australia to St. Louis

Cheap return flights

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Qantas Airways Logo
14:05 - 21:59SYD  Sydney Kingsford Smith-STL Lambert-St Louis
24h 54m1 stop Dallas/Fort Worth
Qantas Airways Logo
06:00 - 09:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 00m1 stop Los Angeles Los Angeles
$1,361Qantas Airways
Wed, 18 Nov - Thu, 19 Nov
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,471American Airlines
Fri, 5 Feb - Tue, 9 Feb
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,472American Airlines
Fri, 5 Feb - Tue, 9 Feb
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,474American Airlines
Fri, 5 Feb - Tue, 9 Feb
Qantas Airways Logo
09:45 - 23:46MEL  Melbourne-STL Lambert-St Louis
30h 01m1 stop Los Angeles Los Angeles
Qantas Airways Logo
19:10 - 05:00STL  Lambert-St Louis-MEL Melbourne
41h 50m1 stop Dallas/Fort Worth
$1,556Qantas Airways
Sat, 17 Oct - Sat, 24 Oct
Qantas Airways Logo
10:10 - 23:46SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 36m1 stop Los Angeles Los Angeles
Qantas Airways Logo
12:47 - 11:45STL  Lambert-St Louis-SYD Sydney Kingsford Smith
30h 58m2 stops Dallas/Fort Worth Brisbane
$1,601Qantas Airways
Tue, 20 Oct - Tue, 27 Oct
United Airlines Logo
10:30 - 17:01SYD  Sydney Kingsford Smith-STL Lambert-St Louis
22h 31m2 stops Los Angeles Los Angeles Chicago O'Hare Intl
United Airlines Logo
13:08 - 08:05STL  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, 20 Oct - Tue, 27 Oct
United Airlines Logo
12:45 - 18:05MEL  Melbourne-STL Lambert-St Louis
22h 20m1 stop San Francisco
United Airlines Logo
09:13 - 09:30STL  Lambert-St Louis-MEL Melbourne
31h 17m2 stops Denver Intl Los Angeles Los Angeles
$1,798United Airlines
Fri, 27 Nov - Mon, 7 Dec
Delta Logo
10:40 - 20:09SYD  Sydney Kingsford Smith-STL Lambert-St Louis
26h 29m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson
Delta Logo
06:13 - 08:30STL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 17m2 stops Minneapolis St Paul Los Angeles Los Angeles
$1,801Delta
Sat, 14 Nov - Mon, 23 Nov
Delta Logo
10:40 - 16:41SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 01m2 stops Los Angeles Los Angeles Minneapolis St Paul
Delta Logo
17:30 - 08:30STL  Lambert-St Louis-SYD Sydney Kingsford Smith
46h 00m2 stops Minneapolis St Paul Los Angeles Los Angeles
$1,801Delta
Sat, 14 Nov - Sat, 21 Nov

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 18/11

14:05-21:59

1 stop24h 54m

Lambert-St Louis

Thu 19/11

06:00-09:00

1 stop34h 00m

$1,361

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,471

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,472

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 5/2

22:45-16:28

2 stops34h 43m

Lambert-St Louis

Tue 9/2

09:00-05:00

1 stop27h 00m

$1,474

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Sat 17/10

09:45-23:46

1 stop30h 01m

Lambert-St Louis

Sat 24/10

19:10-05:00

1 stop41h 50m

$1,556

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 20/10

10:10-23:46

1 stop29h 36m

Lambert-St Louis

Tue 27/10

12:47-11:45

2 stops30h 58m

$1,601
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 20/10

10:30-17:01

2 stops22h 31m

Lambert-St Louis

Tue 27/10

13:08-08:05

3 stops26h 57m

$1,743

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 27/11

12:45-18:05

1 stop22h 20m

Lambert-St Louis

Mon 7/12

09:13-09:30

2 stops31h 17m

$1,798

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 14/11

10:40-20:09

2 stops26h 29m

Lambert-St Louis

Mon 23/11

06:13-08:30

2 stops33h 17m

$1,801

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 14/11

10:40-16:41

2 stops23h 01m

Lambert-St Louis

Sat 21/11

17:30-08:30

2 stops46h 00m

$1,801

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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 $1,442. 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 $1,471.

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 $1,442 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYApril29% more expensiveIt costs about $2,258 for flights to St. Louis from Sydney in April
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEYDecember916% 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

$855

Best Round-Trip Price

$1,361

Fastest flight time

27h 59m
The best one-way flight price to St. Louis from Australia in the last 5 days is $855 (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 $1,361 (Sydney Kingsford Smith to Lambert-St Louis).
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The fastest flight to St. Louis from Australia takes 27h 59m (Melbourne 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 September 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 $1,475
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $981
Devonport to Lambert-St Louis Flightsfrom $2,478
Brisbane to Lambert-St Louis Flightsfrom $1,466