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Look for other cheap flights to Lambert-St Louis

$1,025 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 4/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Australia to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:20 - 12:06
SYD
-
STL
41h 46m
2 stops
Multiple Airlines Logo
16:48 - 07:20
STL
-
SYD
23h 32m
2 stops
$1,618Multiple Airlines
Wed, 20 May - Thu, 28 May
Air Canada Logo
09:20 - 20:25
SYD
-
STL
26h 05m
2 stops
Air Canada Logo
13:05 - 07:20
STL
-
SYD
51h 15m
3 stops
$1,679Air Canada
Wed, 20 May - Thu, 28 May
United Airlines Logo
10:20 - 18:17
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
16:48 - 06:55
STL
-
SYD
23h 07m
2 stops
$1,707United Airlines
Tue, 2 Jun - Tue, 9 Jun
American Airlines Logo
09:10 - 23:59
SYD
-
STL
29h 49m
1 stop
American Airlines Logo
09:41 - 07:05
STL
-
SYD
30h 24m
2 stops
$1,709American Airlines
Wed, 20 May - Thu, 28 May
American Airlines Logo
09:10 - 23:59
SYD
-
STL
29h 49m
1 stop
American Airlines Logo
09:41 - 07:05
STL
-
SYD
30h 24m
2 stops
$1,723American Airlines
Wed, 20 May - Thu, 28 May
American Airlines Logo
12:00 - 16:28
SYD
-
STL
19h 28m
1 stop
American Airlines Logo
06:00 - 07:05
STL
-
SYD
34h 05m
1 stop
$1,728American Airlines
Mon, 3 Aug - Thu, 27 Aug
Qantas Airways Logo
09:10 - 23:59
SYD
-
STL
29h 49m
1 stop
Qantas Airways Logo
06:35 - 07:05
STL
-
SYD
33h 30m
1 stop
$1,745Qantas Airways
Wed, 20 May - Thu, 28 May
Delta Logo
09:15 - 17:46
SYD
-
STL
23h 31m
2 stops
Delta Logo
09:13 - 06:50
STL
-
SYD
30h 37m
2 stops
$1,749Delta
Wed, 20 May - Thu, 28 May
United Airlines Logo
10:20 - 18:22
SYD
-
STL
23h 02m
1 stop
United Airlines Logo
19:23 - 06:55
STL
-
SYD
20h 32m
1 stop
$1,777United Airlines
Wed, 20 May - Thu, 28 May
Qantas Airways Logo
20:45 - 22:55
BNE
-
STL
41h 10m
2 stops
Qantas Airways Logo
06:20 - 05:50
STL
-
BNE
31h 30m
1 stop
$2,726Qantas Airways
Tue, 18 Aug - Mon, 21 Dec

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 5 May 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 - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,618

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,679

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/6

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Tue 9/6

16:48-06:55

2 stops23h 07m

$1,707

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

09:41-07:05

2 stops30h 24m

$1,709

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

09:41-07:05

2 stops30h 24m

$1,723

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 3/8

12:00-16:28

1 stop19h 28m

Lambert-St Louis

Thu 27/8

06:00-07:05

1 stop34h 05m

$1,728

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:10-23:59

1 stop29h 49m

Lambert-St Louis

Thu 28/5

06:35-07:05

1 stop33h 30m

$1,745

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:15-17:46

2 stops23h 31m

Lambert-St Louis

Thu 28/5

09:13-06:50

2 stops30h 37m

$1,749
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Thu 28/5

19:23-06:55

1 stop20h 32m

$1,777

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Tue 18/8

20:45-22:55

2 stops41h 10m

Lambert-St Louis

Mon 21/12

06:20-05:50

1 stop31h 30m

$2,726

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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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 $1,319. If you aren’t able to travel to St. Louis during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,604.

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 SYDNEYSeptember29% cheaperFlying from Sydney to St. Louis costs on average just $1,319 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYApril24% more expensiveIt costs about $2,282 for flights to St. Louis from Sydney in April
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM SYDNEYJuly950% more users visitedMore momondo users searched in flights to St. Louis from Sydney in July 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

$1,025

Best Round-Trip Price

$1,618

Fastest flight time

29h 46m

Popular in

April
The best one-way flight price to St. Louis from Australia in the last 72 hours is $1,025 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The best round-trip flight price to St. Louis from Australia in the last 72 hours is $1,618 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The fastest flight to St. Louis from Australia takes 29h 46m (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
April has the highest demand for flights to St. Louis, with a 12% 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 May 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
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
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,207
Brisbane to Lambert-St Louis Flightsfrom $2,183
Melbourne to Lambert-St Louis Flightsfrom $1,290
Devonport to Lambert-St Louis Flightsfrom $2,348