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

Flight times from Australia to St. Louis vary, but if you’re flying out of Sydney and flying into St. Louis (one of the most popular routes), then the duration is 24h 28m on average. Another popular route from Australia to St. Louis is flying from Melbourne to St. Louis, which will take roughly 38h 38m. Keep in mind that layovers or delays could extend your travel time.

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

Delta, American Airlines, and Cathay Pacific are the most popular carriers operating from Australia to Lambert-St Louis

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 are updated daily.

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

As of July 2025, there are 2 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?

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 layovers. It is recommended that you verify with the airline you are booking with for travel from Australia to Lambert-St Louis Airport.

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

The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$772 Cheap Flights from Australia to St. Louis in 2025

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Find the cheapest flights from Australia to St. Louis

Round-trip

One-way

Last minute

Recent round-trip flight deals from Australia to St. Louis

9:10 am - 7:09 pmSYD-STL

24h 59m2 stops

3:59 pm - 9:00 amSTL-SYD

24h 01m2 stops

$814American Airlines

Find Deal

lun., ago. 18 - sáb., nov. 8

9:10 am - 8:18 pmSYD-STL

26h 08m2 stops

11:39 am - 9:00 amSTL-SYD

28h 21m2 stops

$818American Airlines

Find Deal

lun., ago. 18 - sáb., nov. 8

9:30 am - 6:58 pmSYD-STL

24h 28m2 stops

11:05 am - 6:55 amSTL-SYD

28h 50m2 stops

$830United Airlines

Find Deal

dom., sep. 14 - dom., sep. 21

10:20 am - 4:45 pmSYD-STL

21h 25m1 stop

11:20 am - 7:00 amSTL-SYD

26h 40m1 stop

$834United Airlines

Find Deal

lun., ago. 18 - sáb., nov. 8

9:20 am - 7:57 pmSYD-STL

49h 37m3 stops

1:30 pm - 7:20 amSTL-SYD

50h 50m2 stops

$883Air Canada

Find Deal

vie., sep. 12 - vie., sep. 19

10:20 am - 7:57 pmSYD-STL

49h 37m2 stops

4:37 pm - 9:35 amSTL-SYD

23h 58m2 stops

$885Air Canada

Find Deal

dom., oct. 12 - mar., dic. 16

9:00 pm - 7:38 pmMEL-STL

38h 38m3 stops

9:15 am - 12:35 pmSTL-MEL

35h 20m3 stops

$978

Find Deal

dom., oct. 5 - dom., oct. 19

10:10 am - 11:05 pmSYD-STL

28h 55m1 stop

6:25 am - 7:25 amSTL-SYD

32h 00m1 stop

$1,081Qantas Airways

Find Deal

lun., oct. 13 - dom., dic. 14

9:25 am - 7:38 pmMEL-STL

49h 13m3 stops

4:05 pm - 11:35 amSTL-MEL

52h 30m3 stops

$1,120

Find Deal

sáb., sep. 13 - sáb., sep. 20

10:10 am - 11:05 pmSYD-STL

28h 55m1 stop

6:25 am - 7:25 amSTL-SYD

32h 00m1 stop

$1,130Qantas Airways

Find Deal

lun., oct. 13 - lun., dic. 15

United Airlines flights from Australia to St. Louis

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

United Airlines

Sep 14

SYD9:30 amSydney Kingsford Smith

24h 28m

2 stops

STL6:58 pmLambert-St Louis

Sep 21

STL11:05 amLambert-St Louis

28h 50m

2 stops

SYD6:55 amSydney Kingsford Smith

$830

Find similar

United Airlines

Aug 18

SYD10:20 amSydney Kingsford Smith

21h 25m

1 stop

STL4:45 pmLambert-St Louis

Nov 8

STL11:20 amLambert-St Louis

26h 40m

1 stop

SYD7:00 amSydney Kingsford Smith

$834

Find similar

United Airlines

Sep 12

SYD10:20 amSydney Kingsford Smith

21h 33m

1 stop

STL4:53 pmLambert-St Louis

Sep 19

STL5:49 pmLambert-St Louis

22h 06m

1 stop

SYD6:55 amSydney Kingsford Smith

$837

Find similar

Air Canada flights from Australia to St. Louis

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

Air Canada

Sep 12

SYD9:20 amSydney Kingsford Smith

49h 37m

3 stops

STL7:57 pmLambert-St Louis

Sep 19

STL1:30 pmLambert-St Louis

50h 50m

2 stops

SYD7:20 amSydney Kingsford Smith

$883

Find similar

Air Canada

Oct 12

SYD10:20 amSydney Kingsford Smith

49h 37m

2 stops

STL7:57 pmLambert-St Louis

Dec 16

STL4:37 pmLambert-St Louis

23h 58m

2 stops

SYD9:35 amSydney Kingsford Smith

$885

Find similar

Air Canada

Oct 13

SYD10:20 amSydney Kingsford Smith

25h 37m

2 stops

STL7:57 pmLambert-St Louis

Dec 14

STL4:05 pmLambert-St Louis

48h 30m

2 stops

SYD9:35 amSydney Kingsford Smith

$887

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

9:10 am-7:09 pm

2 stops24h 59m

Lambert-St Louis

sáb. 11/8

3:59 pm-9:00 am

2 stops24h 01m

$814

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

9:10 am-8:18 pm

2 stops26h 08m

Lambert-St Louis

sáb. 11/8

11:39 am-9:00 am

2 stops28h 21m

$818

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

dom. 9/14

9:30 am-6:58 pm

2 stops24h 28m

Lambert-St Louis

dom. 9/21

11:05 am-6:55 am

2 stops28h 50m

$830

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

10:20 am-4:45 pm

1 stop21h 25m

Lambert-St Louis

sáb. 11/8

11:20 am-7:00 am

1 stop26h 40m

$834

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

vie. 9/12

9:20 am-7:57 pm

3 stops49h 37m

Lambert-St Louis

vie. 9/19

1:30 pm-7:20 am

2 stops50h 50m

$883

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

dom. 10/12

10:20 am-7:57 pm

2 stops49h 37m

Lambert-St Louis

mar. 12/16

4:37 pm-9:35 am

2 stops23h 58m

$885

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

dom. 10/5

9:00 pm-7:38 pm

3 stops38h 38m

Lambert-St Louis

dom. 10/19

9:15 am-12:35 pm

3 stops35h 20m

$978

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 10/13

10:10 am-11:05 pm

1 stop28h 55m

Lambert-St Louis

dom. 12/14

6:25 am-7:25 am

1 stop32h 00m

$1,081

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

sáb. 9/13

9:25 am-7:38 pm

3 stops49h 13m

Lambert-St Louis

sáb. 9/20

4:05 pm-11:35 am

3 stops52h 30m

$1,120

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 10/13

10:10 am-11:05 pm

1 stop28h 55m

Lambert-St Louis

lun. 12/15

6:25 am-7:25 am

1 stop32h 00m

$1,130

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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?

In general, November is the cheapest month to fly from Australia to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,065. The month of March is another great option to travel to St. Louis, with average flight prices from Australia averaging around $1,196.

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

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $1,050. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,861. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

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 $1,352 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,824 per ticket.

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

You could potentially save up to 29% 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

Best Price Found	$772
Fastest flight time	20h 20m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Australia in the past 72 hours is $772. The best round-trip flight deal from Australia to St. Louis found on momondo in the last 72 hours is $814.

The fastest flight from Australia to St. Louis takes 20h 20m

There are no direct flights from Australia to St. Louis. Popular non-direct routes for this connection are Sydney Kingsford Smith Airport - Lambert-St Louis Airport and Melbourne Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

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 are updated daily.
How many operators does momondo search for flights from Australia to Lambert-St Louis Airport?
As of July 2025, there are 2 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?
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 layovers. It is recommended that you verify with the airline you are booking with for travel from Australia to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted 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
Qantas Airways	PriceFrom $1,110	Free Cancellation	Rating 7.5 887 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $1,300	Free Cancellation	Rating 7.4 8,900 reviews		Search United Airlines flights

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Chesterfield

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Maryland Heights

Florissant

Fenton

Collinsville

O'Fallon

Alton

St. Peters

Farmington

Wentzville

Festus

Glencoe

Eureka

Edwardsville

Clayton

Shrewsbury

Grafton

Why use momondo?

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

It is quick and easy to find Australia to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Australia with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Australia.

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

Price alerts on flights to St. Louis from Australia 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.