Latest deals
Insights
When to book
FAQs
Price Alerts
Look for other cheap flights to Lambert-St Louis

$855 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 2/11. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Australia to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
American Airlines Logo
11:20 - 23:59SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles Los Angeles
American Airlines Logo
16:57 - 18:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
32h 03m2 stops Dallas/Fort Worth Brisbane
$1,600American Airlines
Tue, 26 Jan - Sat, 30 Jan
American Airlines Logo
11:20 - 23:59SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles Los Angeles
American Airlines Logo
14:54 - 18:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 06m2 stops Dallas/Fort Worth Brisbane
$1,602American Airlines
Tue, 26 Jan - Sat, 30 Jan
American Airlines Logo
11:20 - 23:59SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 39m1 stop Los Angeles Los Angeles
American Airlines Logo
14:54 - 18:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 06m2 stops Dallas/Fort Worth Brisbane
$1,605American Airlines
Tue, 26 Jan - Sat, 30 Jan
Multiple Airlines Logo
14:05 - 20:19SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 14m1 stop Dallas/Fort Worth
Multiple Airlines Logo
14:54 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 01m1 stop Dallas/Fort Worth
$1,728Multiple Airlines
Tue, 17 Nov - Tue, 1 Dec
United Airlines Logo
11:50 - 17:53SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 03m1 stop San Francisco
United Airlines Logo
19:06 - 06:20STL  Lambert-St Louis-SYD Sydney Kingsford Smith
42h 14m1 stop San Francisco
$1,734United Airlines
Tue, 1 Dec - Sat, 6 Feb
United Airlines Logo
11:20 - 19:29SYD  Sydney Kingsford Smith-STL Lambert-St Louis
25h 09m2 stops Los Angeles Los Angeles Chicago O'Hare Intl
United Airlines Logo
19:06 - 06:20STL  Lambert-St Louis-SYD Sydney Kingsford Smith
42h 14m1 stop San Francisco
$1,734United Airlines
Tue, 1 Dec - Sat, 6 Feb
Air New Zealand Logo
07:50 - 22:30SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 40m2 stops Auckland Intl Houston George Bush Intcntl
Air New Zealand Logo
08:36 - 10:40STL  Lambert-St Louis-SYD Sydney Kingsford Smith
35h 04m2 stops San Francisco Auckland Intl
$1,931Air New Zealand
Mon, 14 Sep - Sun, 20 Sep
Multiple Airlines Logo
17:55 - 13:10BNE  Brisbane-STL Lambert-St Louis
58h 15m3 stops Melbourne Los Angeles Los Angeles Atlanta Hartsfield-Jackson
Multiple Airlines Logo
13:30 - 11:00STL  Lambert-St Louis-BNE Brisbane
30h 30m3 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles Sydney Kingsford Smith
$1,942Multiple Airlines
Sat, 3 Oct - Mon, 12 Oct
Qantas Airways Logo
09:10 - 23:30SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 20m1 stop Los Angeles Los Angeles
Qantas Airways Logo
06:04 - 08:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
34h 01m1 stop Los Angeles Los Angeles
$2,409Qantas Airways
Thu, 1 Oct - Thu, 8 Oct
Qantas Airways Logo
08:45 - 16:40BNE  Brisbane-STL Lambert-St Louis
22h 55m2 stops Sydney Kingsford Smith Dallas/Fort Worth
Qantas Airways Logo
06:04 - 05:00STL  Lambert-St Louis-BNE Brisbane
31h 56m1 stop Los Angeles Los Angeles
$2,425Qantas Airways
Sat, 3 Oct - Mon, 12 Oct

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 17 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

Tue 26/1

11:20-23:59

1 stop29h 39m

Lambert-St Louis

Sat 30/1

16:57-18:00

2 stops32h 03m

$1,600

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 26/1

11:20-23:59

1 stop29h 39m

Lambert-St Louis

Sat 30/1

14:54-18:00

2 stops34h 06m

$1,602

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 26/1

11:20-23:59

1 stop29h 39m

Lambert-St Louis

Sat 30/1

14:54-18:00

2 stops34h 06m

$1,605
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

14:05-20:19

1 stop23h 14m

Lambert-St Louis

Tue 1/12

14:54-06:55

1 stop23h 01m

$1,728

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 1/12

11:50-17:53

1 stop23h 03m

Lambert-St Louis

Sat 6/2

19:06-06:20

1 stop42h 14m

$1,734

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 1/12

11:20-19:29

2 stops25h 09m

Lambert-St Louis

Sat 6/2

19:06-06:20

1 stop42h 14m

$1,734

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 14/9

07:50-22:30

2 stops29h 40m

Lambert-St Louis

Sun 20/9

08:36-10:40

2 stops35h 04m

$1,931

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Sat 3/10

17:55-13:10

3 stops58h 15m

Lambert-St Louis

Mon 12/10

13:30-11:00

3 stops30h 30m

$1,942

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Thu 1/10

09:10-23:30

1 stop29h 20m

Lambert-St Louis

Thu 8/10

06:04-08:05

1 stop34h 01m

$2,409

BrisbaneSt. Louis

BNE Brisbane - STL Lambert-St Louis

BNESTL

Brisbane

Sat 3/10

08:45-16:40

2 stops22h 55m

Lambert-St Louis

Mon 12/10

06:04-05:00

1 stop31h 56m

$2,425

Flights are sorted by cheapest return flights first.

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

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 $1,461. 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 $1,491.

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 $1,461 in September
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM SYDNEYApril30% more expensiveIt costs about $2,288 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

$855

Best Round-Trip Price

$1,600

Fastest flight time

20h 09m
The best one-way flight price to St. Louis from Australia in the last 5 days is $855 (Melbourne to Lambert-St Louis).
Search Deals
The best return flight price to St. Louis from Australia in the last 5 days is $1,600 (Sydney Kingsford Smith to Lambert-St Louis).
Search Deals
The fastest flight to St. Louis from Australia takes 20h 09m (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 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.

An easier way to manage your Lambert-St Louis trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 16/9
Wed 23/9
By creating a price alert you accept our terms of use and privacy policy.

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 $1,800
Sydney Kingsford Smith to Lambert-St Louis Flightsfrom $1,161
Brisbane to Lambert-St Louis Flightsfrom $1,381
Devonport to Lambert-St Louis Flightsfrom $2,355