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 Melbourne and flying into St. Louis (one of the most popular routes), then the duration is 23h 37m on average. Another popular route from Australia to St. Louis is flying from Sydney to St. Louis, which will take roughly 24h 58m. 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?

United Airlines, Air New Zealand, and American Airlines 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 November 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.

$585 Cheap Flights from Australia to St. Louis in 2025/26

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Find the cheapest flights from Australia to St. Louis

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

Enter your travel dates to find the best prices.

1:00 pm - 4:27 pmMEL-STL

20h 27m1 stop

11:05 am - 9:30 amSTL-MEL

29h 25m2 stops

$924United Airlines

Find Deal

Thu, Dec 11 - Wed, Dec 31

10:10 am - 4:49 pmMEL-STL

23h 39m2 stops

7:02 pm - 8:00 amSTL-MEL

43h 58m2 stops

$931Delta

Find Deal

Fri, Dec 12 - Tue, Dec 30

12:10 pm - 6:47 pmMEL-STL

23h 37m2 stops

6:15 am - 9:25 amSTL-MEL

34h 10m2 stops

$987Air New Zealand

Find Deal

Thu, Nov 20 - Wed, Dec 3

10:10 am - 5:43 pmMEL-STL

24h 33m2 stops

6:59 pm - 7:00 amSTL-MEL

44h 01m2 stops

$1,110Delta

Find Deal

Fri, Mar 6 - Tue, Mar 10

3:50 pm - 11:57 pmMEL-STL

25h 07m2 stops

6:44 pm - 11:25 amSTL-MEL

23h 41m2 stops

$1,284Qantas Airways

Find Deal

Fri, Dec 12 - Mon, Dec 29

10:25 am - 3:29 pmSYD-STL

45h 04m2 stops

4:05 pm - 8:35 amSTL-SYD

48h 30m2 stops

$1,349Air Canada

Find Deal

Thu, Mar 12 - Mon, Mar 16

10:25 am - 3:29 pmSYD-STL

45h 04m2 stops

4:05 pm - 8:35 amSTL-SYD

48h 30m2 stops

$1,406Air Canada

Find Deal

Thu, Mar 12 - Mon, Mar 16

6:30 am - 4:09 pmSYD-STL

25h 39m2 stops

6:30 am - 9:00 amSTL-SYD

34h 30m1 stop

$1,418Qantas Airways

Find Deal

Thu, Mar 12 - Mon, Mar 16

11:20 am - 11:09 pmSYD-STL

27h 49m1 stop

5:59 pm - 6:55 amSTL-SYD

20h 56m1 stop

$1,627American Airlines

Find Deal

Thu, Mar 12 - Mon, Mar 16

4:05 pm - 7:26 pmMEL-STL

20h 21m1 stop

5:59 pm - 5:00 amSTL-MEL

43h 01m1 stop

$1,668American Airlines

Find Deal

Fri, Mar 6 - Tue, Mar 10

United Airlines flights from Australia to St. Louis

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

United Airlines

Dec 11

MEL1:00 pmMelbourne

20h 27m

1 stop

STL4:27 pmLambert-St Louis

Dec 31

STL11:05 amLambert-St Louis

29h 25m

2 stops

MEL9:30 amMelbourne

$924

Find similar

United Airlines

Dec 11

MEL1:00 pmMelbourne

20h 27m

1 stop

STL4:27 pmLambert-St Louis

Jan 4

STL2:45 pmLambert-St Louis

25h 45m

2 stops

MEL9:30 amMelbourne

$1,230

Find similar

United Airlines

Dec 11

MEL1:00 pmMelbourne

20h 27m

1 stop

STL4:27 pmLambert-St Louis

Jan 3

STL2:45 pmLambert-St Louis

25h 45m

2 stops

MEL9:30 amMelbourne

$1,279

Find similar

Delta flights from Australia to St. Louis

Our best Delta deals on Australia to St. Louis flight tickets

Delta

Dec 12

MEL10:10 amMelbourne

23h 39m

2 stops

STL4:49 pmLambert-St Louis

Dec 30

STL7:02 pmLambert-St Louis

43h 58m

2 stops

MEL8:00 amMelbourne

$931

Find similar

Delta

Mar 6

MEL10:10 amMelbourne

24h 33m

2 stops

STL5:43 pmLambert-St Louis

Mar 10

STL6:59 pmLambert-St Louis

44h 01m

2 stops

MEL7:00 amMelbourne

$1,110

Find similar

Delta

Mar 6

MEL10:10 amMelbourne

24h 33m

2 stops

STL5:43 pmLambert-St Louis

Mar 10

STL6:59 pmLambert-St Louis

44h 01m

2 stops

MEL7:00 amMelbourne

$1,113

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 12/11

1:00 pm-4:27 pm

1 stop20h 27m

Lambert-St Louis

Wed 12/31

11:05 am-9:30 am

2 stops29h 25m

$924

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 12/12

10:10 am-4:49 pm

2 stops23h 39m

Lambert-St Louis

Tue 12/30

7:02 pm-8:00 am

2 stops43h 58m

$931

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 11/20

12:10 pm-6:47 pm

2 stops23h 37m

Lambert-St Louis

Wed 12/3

6:15 am-9:25 am

2 stops34h 10m

$987

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 3/6

10:10 am-5:43 pm

2 stops24h 33m

Lambert-St Louis

Tue 3/10

6:59 pm-7:00 am

2 stops44h 01m

$1,110

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 12/12

3:50 pm-11:57 pm

2 stops25h 07m

Lambert-St Louis

Mon 12/29

6:44 pm-11:25 am

2 stops23h 41m

$1,284

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

10:25 am-3:29 pm

2 stops45h 04m

Lambert-St Louis

Mon 3/16

4:05 pm-8:35 am

2 stops48h 30m

$1,349

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

10:25 am-3:29 pm

2 stops45h 04m

Lambert-St Louis

Mon 3/16

4:05 pm-8:35 am

2 stops48h 30m

$1,406

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

6:30 am-4:09 pm

2 stops25h 39m

Lambert-St Louis

Mon 3/16

6:30 am-9:00 am

1 stop34h 30m

$1,418

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

11:20 am-11:09 pm

1 stop27h 49m

Lambert-St Louis

Mon 3/16

5:59 pm-6:55 am

1 stop20h 56m

$1,627

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 3/6

4:05 pm-7:26 pm

1 stop20h 21m

Lambert-St Louis

Tue 3/10

5:59 pm-5:00 am

1 stop43h 01m

$1,668

Flights are sorted by cheapest round-trip 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?

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 $1,031. The month of August is another great option to travel to St. Louis, with average flight prices from Australia averaging around $1,128.

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 35% 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

Direct flights	None

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 are updated daily.
How many operators does momondo search for flights from Australia to Lambert-St Louis Airport?
As of November 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
United Airlines	PriceFrom $822	Free Cancellation	Rating 7.4 9,011 reviews		Search United Airlines flights
Qantas Airways	PriceFrom $1,110	Free Cancellation	Rating 7.5 930 reviews		Search Qantas Airways flights

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Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Fenton

Collinsville

St. Peters

Alton

Farmington

Festus

Glencoe

Edwardsville

Clayton

Eureka

Litchfield

Shrewsbury

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.