Which airlines fly to St. Louis?

United Airlines, Qantas Airways and Air Canada are the top three most popular airlines that fly to St. Louis from Australia according to our data. United Airlines is the first choice among our users, with 61% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Australia to Lambert-St Louis?

United Airlines, Delta, and Qantas Airways are the most popular carriers operating from Australia to Lambert-St Louis

How long does it take to fly to St. Louis?

The flight from Australia to St. Louis depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Brisbane (a popular airport in Australia) to St. Louis (the most popular airport in St. Louis), then the flight time is 21h 04m on average. If you fly from Sydney (another popular airport in Australia) to St. Louis, then the average flight time is 32h 52m.

When did momondo last update prices for flights from Australia to Lambert-St Louis Airport?

Prices for flights from Australia to Lambert-St Louis Airport refresh daily.

How many operators does momondo search for flights from Australia to Lambert-St Louis Airport?

As of December 2025, there are 3 operators available to choose from for flights from Australia to Lambert-St Louis Airport.

How old do you have to be to fly from Australia to Lambert-St Louis Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Australia to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$878 Cheap Flights from Australia to St. Louis in 2025/26

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

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

Trusted and free

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

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Australia to St. Louis

Round-trip

One-way

Recent return flight deals from Australia to St. Louis

Enter your travel dates to find the best prices.

10:45 - 15:29

BNE

STL

44h 44m2 stops

14:45 - 08:45

STL

BNE

26h 00m2 stops

$1,226Air Canada

Wed, 18 Feb - Sun, 22 Feb

10:45 - 15:29

BNE

STL

44h 44m2 stops

08:45 - 08:45

STL

BNE

32h 00m2 stops

$1,244Air Canada

Mon, 26 Jan - Mon, 2 Feb

10:45 - 15:29

BNE

STL

44h 44m2 stops

14:45 - 08:45

STL

BNE

26h 00m2 stops

$1,246Air Canada

Wed, 18 Feb - Sun, 22 Feb

19:40 - 23:48

BNE

STL

20h 08m1 stop

09:32 - 05:00

STL

BNE

27h 28m2 stops

$1,255American Airlines

Wed, 18 Feb - Sun, 22 Feb

19:40 - 23:48

BNE

STL

20h 08m1 stop

15:31 - 06:30

STL

BNE

22h 59m1 stop

$1,256American Airlines

Wed, 18 Feb - Sun, 22 Feb

19:40 - 23:59

BNE

STL

20h 19m1 stop

11:55 - 06:30

STL

BNE

26h 35m1 stop

$1,267Multiple Airlines

Mon, 26 Jan - Mon, 2 Feb

11:40 - 15:37

BNE

STL

19h 57m1 stop

08:45 - 07:30

STL

BNE

30h 45m2 stops

$1,273United Airlines

Mon, 26 Jan - Mon, 2 Feb

21:40 - 13:54

SYD

STL

33h 14m2 stops

14:50 - 19:45

STL

SYD

35h 55m2 stops

$1,636Multiple Airlines

Tue, 27 Jan - Tue, 3 Feb

20:30 - 23:48

LST

STL

44h 18m2 stops

06:30 - 16:35

STL

LST

41h 05m2 stops

$3,008Qantas Airways

Wed, 18 Feb - Sun, 22 Feb

20:30 - 23:48

LST

STL

44h 18m2 stops

06:30 - 16:35

STL

LST

41h 05m2 stops

$3,013Qantas Airways

Wed, 18 Feb - Sun, 22 Feb

Air Canada flights from Australia to St. Louis

Our best Air Canada deals on Australia to St. Louis flight tickets

Air Canada

18 Feb

BNE10:45Brisbane

44h 44m

2 stops

STL15:29Lambert-St Louis

22 Feb

STL14:45Lambert-St Louis

26h 00m

2 stops

BNE08:45Brisbane

$1,226

Find similar

Air Canada

26 Jan

BNE10:45Brisbane

44h 44m

2 stops

STL15:29Lambert-St Louis

2 Feb

STL08:45Lambert-St Louis

32h 00m

2 stops

BNE08:45Brisbane

$1,244

Find similar

Air Canada

18 Feb

BNE10:45Brisbane

44h 44m

2 stops

STL15:29Lambert-St Louis

22 Feb

STL14:45Lambert-St Louis

26h 00m

2 stops

BNE08:45Brisbane

$1,246

Find similar

United Airlines flights from Australia to St. Louis

Our best United Airlines deals on Australia to St. Louis flight tickets

United Airlines

26 Jan

BNE11:40Brisbane

19h 57m

1 stop

STL15:37Lambert-St Louis

2 Feb

STL08:45Lambert-St Louis

30h 45m

2 stops

BNE07:30Brisbane

$1,273

Find similar

United Airlines

11 May

SYD10:20Sydney Kingsford Smith

34h 27m

1 stop

STL05:47Lambert-St Louis

27 May

STL19:06Lambert-St Louis

20h 49m

1 stop

SYD06:55Sydney Kingsford Smith

$1,776

Find similar

United Airlines

9 May

SYD09:30Sydney Kingsford Smith

22h 25m

2 stops

STL16:55Lambert-St Louis

28 May

STL08:00Lambert-St Louis

31h 55m

2 stops

SYD06:55Sydney Kingsford Smith

$1,926

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 18/2

10:45-15:29

2 stops44h 44m

Lambert-St Louis

Sun 22/2

14:45-08:45

2 stops26h 00m

$1,226

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 26/1

10:45-15:29

2 stops44h 44m

Lambert-St Louis

Mon 2/2

08:45-08:45

2 stops32h 00m

$1,244

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 18/2

10:45-15:29

2 stops44h 44m

Lambert-St Louis

Sun 22/2

14:45-08:45

2 stops26h 00m

$1,246

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 18/2

19:40-23:48

1 stop20h 08m

Lambert-St Louis

Sun 22/2

09:32-05:00

2 stops27h 28m

$1,255

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 18/2

19:40-23:48

1 stop20h 08m

Lambert-St Louis

Sun 22/2

15:31-06:30

1 stop22h 59m

$1,256

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 26/1

19:40-23:59

1 stop20h 19m

Lambert-St Louis

Mon 2/2

11:55-06:30

1 stop26h 35m

$1,267

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 26/1

11:40-15:37

1 stop19h 57m

Lambert-St Louis

Mon 2/2

08:45-07:30

2 stops30h 45m

$1,273

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 27/1

21:40-13:54

2 stops33h 14m

Lambert-St Louis

Tue 3/2

14:50-19:45

2 stops35h 55m

$1,636

LauncestonSt. Louis

LST - STL

LSTSTL

Launceston

Wed 18/2

20:30-23:48

2 stops44h 18m

Lambert-St Louis

Sun 22/2

06:30-16:35

2 stops41h 05m

$3,008

LauncestonSt. Louis

LST - STL

LSTSTL

Launceston

Wed 18/2

20:30-23:48

2 stops44h 18m

Lambert-St Louis

Sun 22/2

06:30-16:35

2 stops41h 05m

$3,013

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Australia to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to St. Louis?

The month of August is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,693. If you aren’t able to travel to St. Louis during the month of August, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $1,789.

What is the cheapest day to depart on your flight to St. Louis?

According to our data, Saturday is the cheapest day to fly to St. Louis from Australia. The lowest ticket price found for a Saturday departure recently was $2,097. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Australia to St. Louis on a Thursday will generally be more expensive and average around $2,686. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Australia in the morning is the least expensive time of day to depart. momondo users have found prices as low as $2,148 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $3,118 per ticket.

Can stopping save me money on Australia to St. Louis flights?

You could potentially save up to 11% on your flight if you consider stops on a Australia to St. Louis flight.

Cheap Australia to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Australia to St. Louis

Fastest flight time	21h 04m
Direct flights	None

The fastest flight from Australia to St. Louis takes 21h 04m

There are no direct flights from Australia to St. Louis. There are no popular flight routes from Australia to St. Louis.

Search flight deals

When did momondo last update prices for flights from Australia to Lambert-St Louis Airport?
Prices for flights from Australia to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Australia to Lambert-St Louis Airport?
As of December 2025, there are 3 operators available to choose from for flights from Australia to Lambert-St Louis Airport.
How old do you have to be to fly from Australia to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Australia to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Australia to St. Louis

Compare and see reviews for airlines that fly from Australia to St. Louis with momondo

Airline	Rating	Free cancellation	Price
Air Canada	PriceFrom $1,099	Free cancellation	Rating 7.1 10,522 reviews	Search Air Canada flights
United Airlines	PriceFrom $1,228	Free cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights
Qantas Airways	PriceFrom $1,458	Free cancellation	Rating 7.5 946 reviews	Search Qantas Airways flights

Chesterfield

Why use momondo?

Why should I use momondo to find a flight deal from Australia to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Australia to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Australia to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Australia to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Australia to St. Louis?

momondo provides multiple filters to help you find the best flight to St. Louis from Australia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Australia to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Australia and alert you when they change.