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$805 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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Delta Logo
10:10 - 23:26MEL  Melbourne-STL Lambert-St Louis
54h 16m2 stops Los Angeles Minneapolis St Paul
Delta Logo
19:18 - 08:00STL  Lambert-St Louis-MEL Melbourne
67h 42m2 stops Atlanta Hartsfield-Jackson Los Angeles
$1,575Delta
Tue, 1 Dec - Sun, 6 Dec
American Airlines Logo
14:05 - 18:09SYD  Sydney Kingsford Smith-STL Lambert-St Louis
21h 04m1 stop Dallas/Fort Worth
American Airlines Logo
06:00 - 08:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 05m1 stop Los Angeles
$1,685American Airlines
Sat, 27 Feb - Wed, 31 Mar
American Airlines Logo
14:05 - 20:46SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 41m2 stops Dallas/Fort Worth Chicago O'Hare Intl
American Airlines Logo
06:00 - 08:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 05m1 stop Los Angeles
$1,718American Airlines
Sun, 28 Feb - Wed, 31 Mar
American Airlines Logo
14:05 - 20:54SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 49m2 stops Dallas/Fort Worth Chicago O'Hare Intl
American Airlines Logo
06:00 - 08:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 05m1 stop Los Angeles
$1,718American Airlines
Sat, 27 Feb - Wed, 31 Mar
Qantas Airways Logo
06:05 - 14:05SYD  Sydney Kingsford Smith-STL Lambert-St Louis
25h 00m2 stops Brisbane Dallas/Fort Worth
Qantas Airways Logo
14:23 - 21:30STL  Lambert-St Louis-SYD Sydney Kingsford Smith
38h 07m2 stops Dallas/Fort Worth Brisbane
$1,831Qantas Airways
Tue, 26 Jan - Wed, 24 Feb
Qantas Airways Logo
11:10 - 23:36SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 26m1 stop Los Angeles
Qantas Airways Logo
14:23 - 21:30STL  Lambert-St Louis-SYD Sydney Kingsford Smith
38h 07m2 stops Dallas/Fort Worth Brisbane
$1,831Qantas Airways
Tue, 26 Jan - Wed, 24 Feb
United Airlines Logo
12:45 - 18:05MEL  Melbourne-STL Lambert-St Louis
22h 20m1 stop San Francisco
United Airlines Logo
08:40 - 09:30STL  Lambert-St Louis-MEL Melbourne
31h 50m2 stops Denver Intl Los Angeles
$1,866United Airlines
Sat, 28 Nov - Sun, 6 Dec
United Airlines Logo
12:45 - 18:05MEL  Melbourne-STL Lambert-St Louis
22h 20m1 stop San Francisco
United Airlines Logo
08:17 - 10:30STL  Lambert-St Louis-MEL Melbourne
33h 13m1 stop San Francisco
$1,866United Airlines
Sat, 28 Nov - Sun, 6 Dec
Multiple Airlines Logo
22:45 - 20:40MEL  Melbourne-STL Lambert-St Louis
38h 55m1 stop Los Angeles
Multiple Airlines Logo
06:01 - 23:30STL  Lambert-St Louis-MEL Melbourne
48h 29m2 stops Los Angeles Sydney Kingsford Smith
$1,875Multiple Airlines
Fri, 4 Dec - Wed, 20 Jan
Delta Logo
10:10 - 23:26MEL  Melbourne-STL Lambert-St Louis
54h 16m2 stops Los Angeles Minneapolis St Paul
Delta Logo
07:03 - 08:00STL  Lambert-St Louis-MEL Melbourne
55h 57m2 stops Atlanta Hartsfield-Jackson Los Angeles
$1,932Delta
Tue, 1 Dec - Sat, 5 Dec

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

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Tue 1/12

10:10-23:26

2 stops54h 16m

Lambert-St Louis

Sun 6/12

19:18-08:00

2 stops67h 42m

$1,575

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 27/2

14:05-18:09

1 stop21h 04m

Lambert-St Louis

Wed 31/3

06:00-08:05

1 stop34h 05m

$1,685

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sun 28/2

14:05-20:46

2 stops23h 41m

Lambert-St Louis

Wed 31/3

06:00-08:05

1 stop34h 05m

$1,718

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 27/2

14:05-20:54

2 stops23h 49m

Lambert-St Louis

Wed 31/3

06:00-08:05

1 stop34h 05m

$1,718

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 26/1

06:05-14:05

2 stops25h 00m

Lambert-St Louis

Wed 24/2

14:23-21:30

2 stops38h 07m

$1,831

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 26/1

11:10-23:36

1 stop29h 26m

Lambert-St Louis

Wed 24/2

14:23-21:30

2 stops38h 07m

$1,831
Fastest return journey

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Sat 28/11

12:45-18:05

1 stop22h 20m

Lambert-St Louis

Sun 6/12

08:40-09:30

2 stops31h 50m

$1,866

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Sat 28/11

12:45-18:05

1 stop22h 20m

Lambert-St Louis

Sun 6/12

08:17-10:30

1 stop33h 13m

$1,866

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Fri 4/12

22:45-20:40

1 stop38h 55m

Lambert-St Louis

Wed 20/1

06:01-23:30

2 stops48h 29m

$1,875

MelbourneSt. Louis

MEL Melbourne - STL Lambert-St Louis

MELSTL

Melbourne

Tue 1/12

10:10-23:26

2 stops54h 16m

Lambert-St Louis

Sat 5/12

07:03-08:00

2 stops55h 57m

$1,932

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 January is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,475. If you aren’t able to travel to St. Louis during the month of January, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $1,536.

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 SYDNEYJanuary23% cheaperFlying from Sydney to St. Louis costs on average just $1,475 in January
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYJune30% more expensiveIt costs about $2,503 for flights to St. Louis from Sydney in June
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEYDecember662% 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

$805

Best Round-Trip Price

$1,575

Fastest flight time

36h 25m

Popular in

April
The best one-way flight price to St. Louis from Australia in the last 5 days is $805 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The best return flight price to St. Louis from Australia in the last 5 days is $1,575 (Melbourne to Lambert-St Louis).
Search Deals
The fastest flight to St. Louis from Australia takes 36h 25m (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
April has the highest demand for flights to St. Louis, with a 2% price increase on average.
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 November 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 $1,282
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,275
Brisbane to Lambert-St Louis Flightsfrom $1,896
Devonport to Lambert-St Louis Flightsfrom $2,333