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

American 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?

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 23h 22m on average. Another popular route from Australia to St. Louis is flying from Melbourne to St. Louis, which will take roughly 26h 30m. Keep in mind that layovers or delays could extend your travel time.

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 December 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

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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

Last minute

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

Enter your travel dates to find the best prices.

11:45 am - 10:00 pm

SYD

STL

27h 15m2 stops

6:00 am - 8:45 am

STL

SYD

33h 45m2 stops

$1,069Air New Zealand

Mon, Feb 9 - Mon, Feb 16

11:45 am - 10:00 pm

SYD

STL

27h 15m2 stops

7:41 am - 8:45 am

STL

SYD

32h 04m3 stops

$1,150Multiple Airlines

Mon, Feb 9 - Mon, Feb 16

11:20 am - 3:29 pm

SYD

STL

45h 09m2 stops

4:30 pm - 9:35 am

STL

SYD

24h 05m2 stops

$1,161Air Canada

Tue, Feb 10 - Tue, Feb 17

8:00 am - 3:29 pm

MEL

STL

48h 29m3 stops

4:05 pm - 3:35 pm

STL

MEL

54h 30m3 stops

$1,175Air Canada

Fri, Feb 6 - Mon, Feb 9

6:00 am - 4:14 pm

MEL

STL

27h 14m2 stops

5:04 pm - 4:40 pm

STL

MEL

30h 36m2 stops

$1,327Qantas Airways

Fri, Feb 6 - Mon, Feb 9

6:00 am - 2:47 pm

MEL

STL

25h 47m2 stops

11:55 am - 5:00 am

STL

MEL

24h 05m1 stop

$1,590Qantas Airways

Fri, Feb 6 - Mon, Feb 9

7:20 am - 1:09 pm

MEL

STL

46h 49m2 stops

8:31 am - 5:40 am

STL

MEL

28h 09m2 stops

$1,721Japan Airlines

Fri, Feb 6 - Mon, Feb 9

7:20 am - 1:09 pm

MEL

STL

46h 49m2 stops

8:31 am - 5:40 am

STL

MEL

28h 09m2 stops

$1,723Japan Airlines

Fri, Feb 6 - Mon, Feb 9

12:00 pm - 11:59 pm

MEL

STL

28h 59m1 stop

9:34 am - 5:00 am

STL

MEL

26h 26m1 stop

$1,724American Airlines

Fri, Feb 6 - Mon, Feb 9

12:00 pm - 10:59 pm

MEL

STL

27h 59m2 stops

11:55 am - 5:00 am

STL

MEL

24h 05m1 stop

$1,727American Airlines

Fri, Feb 6 - Mon, Feb 9

Delta flights from Australia to St. Louis

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

Delta

Jan 10

SYD10:40 amSydney Kingsford Smith

27h 55m

2 stops

STL9:35 pmLambert-St Louis

Jun 7

STL8:50 amLambert-St Louis

30h 45m

2 stops

SYD6:35 amSydney Kingsford Smith

$1,912

Find similar

Delta

Jan 10

SYD10:40 amSydney Kingsford Smith

27h 55m

2 stops

STL9:35 pmLambert-St Louis

Jun 7

STL1:30 pmLambert-St Louis

26h 05m

2 stops

SYD6:35 amSydney Kingsford Smith

$1,913

Find similar

Delta

Jun 24

MEL10:00 amMelbourne

29h 36m

2 stops

STL12:36 amLambert-St Louis

Jul 17

STL6:30 amLambert-St Louis

34h 20m

2 stops

MEL7:50 amMelbourne

$2,018

Find similar

United Airlines flights from Australia to St. Louis

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

United Airlines

Feb 19

SYD11:50 amSydney Kingsford Smith

20h 48m

1 stop

STL3:38 pmLambert-St Louis

Feb 23

STL4:39 pmLambert-St Louis

21h 21m

1 stop

SYD7:00 amSydney Kingsford Smith

$1,691

Find similar

United Airlines

Feb 19

SYD11:50 amSydney Kingsford Smith

20h 48m

1 stop

STL3:38 pmLambert-St Louis

Feb 23

STL5:25 pmLambert-St Louis

22h 50m

1 stop

SYD9:15 amSydney Kingsford Smith

$1,694

Find similar

United Airlines

Dec 30

MEL1:00 pmMelbourne

23h 18m

2 stops

STL7:18 pmLambert-St Louis

Jan 1

STL9:00 amLambert-St Louis

32h 00m

2 stops

MEL10:00 amMelbourne

$1,735

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 2/9

11:45 am-10:00 pm

2 stops27h 15m

Lambert-St Louis

Mon 2/16

6:00 am-8:45 am

2 stops33h 45m

$1,069

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 2/9

11:45 am-10:00 pm

2 stops27h 15m

Lambert-St Louis

Mon 2/16

7:41 am-8:45 am

3 stops32h 04m

$1,150

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/10

11:20 am-3:29 pm

2 stops45h 09m

Lambert-St Louis

Tue 2/17

4:30 pm-9:35 am

2 stops24h 05m

$1,161

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

8:00 am-3:29 pm

3 stops48h 29m

Lambert-St Louis

Mon 2/9

4:05 pm-3:35 pm

3 stops54h 30m

$1,175

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

6:00 am-4:14 pm

2 stops27h 14m

Lambert-St Louis

Mon 2/9

5:04 pm-4:40 pm

2 stops30h 36m

$1,327

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

6:00 am-2:47 pm

2 stops25h 47m

Lambert-St Louis

Mon 2/9

11:55 am-5:00 am

1 stop24h 05m

$1,590

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

7:20 am-1:09 pm

2 stops46h 49m

Lambert-St Louis

Mon 2/9

8:31 am-5:40 am

2 stops28h 09m

$1,721

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

7:20 am-1:09 pm

2 stops46h 49m

Lambert-St Louis

Mon 2/9

8:31 am-5:40 am

2 stops28h 09m

$1,723

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

12:00 pm-11:59 pm

1 stop28h 59m

Lambert-St Louis

Mon 2/9

9:34 am-5:00 am

1 stop26h 26m

$1,724

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 2/6

12:00 pm-10:59 pm

2 stops27h 59m

Lambert-St Louis

Mon 2/9

11:55 am-5:00 am

1 stop24h 05m

$1,727

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, August 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 $1,128. The month of November is another great option to travel to St. Louis, with average flight prices from Australia averaging around $1,192.

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.

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

You could potentially save up to 6% 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	23h 22m
Direct flights	None

The fastest flight from Australia to St. Louis takes 23h 22m

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 December 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 9,116 reviews		Search United Airlines flights
Qantas Airways	PriceFrom $1,110	Free Cancellation	Rating 7.5 957 reviews		Search Qantas Airways flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Glencoe

Eureka

Festus

Edwardsville

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.