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Cheap flights from Australia to St. Louis from $890

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Australia to St. Louis departing on 8/6. 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

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Find the cheapest flights from Australia to St. Louis

Recent return flight deals from Australia to St. Louis

Enter your travel dates to find the best prices.
American Airlines Logo
09:10 - 16:33
SYD
-
STL
22h 23m
2 stops
American Airlines Logo
20:39 - 07:05
STL
-
SYD
43h 26m
2 stops
$1,415American Airlines
Thu, 4 Jun - Sat, 13 Jun
American Airlines Logo
09:10 - 18:30
SYD
-
STL
24h 20m
2 stops
American Airlines Logo
20:39 - 07:05
STL
-
SYD
43h 26m
2 stops
$1,416American Airlines
Thu, 4 Jun - Sat, 13 Jun
Qantas Airways Logo
09:10 - 23:56
SYD
-
STL
29h 46m
1 stop
Qantas Airways Logo
06:35 - 07:05
STL
-
SYD
33h 30m
1 stop
$1,431Qantas Airways
Thu, 4 Jun - Sat, 13 Jun
United Airlines Logo
10:20 - 18:17
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
19:05 - 06:55
STL
-
SYD
44h 50m
2 stops
$1,441United Airlines
Thu, 4 Jun - Sat, 13 Jun
Air Canada Logo
09:20 - 18:42
SYD
-
STL
48h 22m
2 stops
Air Canada Logo
08:55 - 07:20
STL
-
SYD
31h 25m
2 stops
$1,467Air Canada
Mon, 10 Aug - Fri, 4 Sep
Qantas Airways Logo
09:10 - 23:56
SYD
-
STL
29h 46m
1 stop
Qantas Airways Logo
06:35 - 07:05
STL
-
SYD
33h 30m
1 stop
$1,478Qantas Airways
Thu, 4 Jun - Sat, 13 Jun
United Airlines Logo
10:55 - 18:39
MEL
-
STL
22h 44m
1 stop
United Airlines Logo
07:00 - 08:15
STL
-
MEL
34h 15m
1 stop
$1,792United Airlines
Mon, 7 Sep - Sun, 27 Sep
Air Canada Logo
20:30 - 20:09
MEL
-
STL
38h 39m
3 stops
Air Canada Logo
08:40 - 11:35
STL
-
MEL
35h 55m
3 stops
$1,915Air Canada
Wed, 3 Jun - Sun, 7 Jun
Multiple Airlines Logo
07:00 - 20:00
MEL
-
STL
29h 00m
3 stops
Multiple Airlines Logo
16:15 - 13:35
STL
-
MEL
52h 20m
3 stops
$2,212Multiple Airlines
Thu, 15 Oct - Sat, 7 Nov
Multiple Airlines Logo
23:45 - 23:59
MEL
-
STL
40h 14m
2 stops
Multiple Airlines Logo
16:15 - 13:35
STL
-
MEL
52h 20m
3 stops
$2,393Multiple Airlines
Thu, 15 Oct - Sat, 7 Nov

Air Canada flights from Australia to St. Louis

Our best Air Canada deals on Australia to St. Louis flight tickets
Air Canada
10 Aug
SYD09:20Sydney Kingsford Smith
48h 22m
2 stops
STL18:42Lambert-St Louis
4 Sept
STL08:55Lambert-St Louis
31h 25m
2 stops
SYD07:20Sydney Kingsford Smith
$1,467
Air Canada
10 Aug
SYD09:20Sydney Kingsford Smith
48h 22m
3 stops
STL18:42Lambert-St Louis
4 Sept
STL08:55Lambert-St Louis
31h 25m
2 stops
SYD07:20Sydney Kingsford Smith
$1,521
Air Canada
28 May
SYD09:20Sydney Kingsford Smith
41h 46m
2 stops
STL12:06Lambert-St Louis
7 June
STL13:05Lambert-St Louis
51h 15m
3 stops
SYD07:20Sydney Kingsford Smith
$1,642

Qantas Airways flights from Australia to St. Louis

Our best Qantas Airways deals on Australia to St. Louis flight tickets
Qantas Airways
28 May
SYD09:10Sydney Kingsford Smith
29h 46m
1 stop
STL23:56Lambert-St Louis
7 June
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,410
Qantas Airways
4 June
SYD09:10Sydney Kingsford Smith
29h 46m
1 stop
STL23:56Lambert-St Louis
13 June
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,431
Qantas Airways
4 June
SYD09:10Sydney Kingsford Smith
29h 46m
1 stop
STL23:56Lambert-St Louis
13 June
STL06:35Lambert-St Louis
33h 30m
1 stop
SYD07:05Sydney Kingsford Smith
$1,478

momondo Fare Finder

 
Customise your flight search to find flights from Australia to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 24 May 2026.
Use the filters below to find and compare flights from Australia to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

09:10-16:33

2 stops22h 23m

Lambert-St Louis

Sat 13/6

20:39-07:05

2 stops43h 26m

$1,415

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

09:10-18:30

2 stops24h 20m

Lambert-St Louis

Sat 13/6

20:39-07:05

2 stops43h 26m

$1,416

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

09:10-23:56

1 stop29h 46m

Lambert-St Louis

Sat 13/6

06:35-07:05

1 stop33h 30m

$1,431

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Sat 13/6

19:05-06:55

2 stops44h 50m

$1,441

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 10/8

09:20-18:42

2 stops48h 22m

Lambert-St Louis

Fri 4/9

08:55-07:20

2 stops31h 25m

$1,467

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

09:10-23:56

1 stop29h 46m

Lambert-St Louis

Sat 13/6

06:35-07:05

1 stop33h 30m

$1,478
Fastest return journey

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/9

10:55-18:39

1 stop22h 44m

Lambert-St Louis

Sun 27/9

07:00-08:15

1 stop34h 15m

$1,792

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 3/6

20:30-20:09

3 stops38h 39m

Lambert-St Louis

Sun 7/6

08:40-11:35

3 stops35h 55m

$1,915

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 15/10

07:00-20:00

3 stops29h 00m

Lambert-St Louis

Sat 7/11

16:15-13:35

3 stops52h 20m

$2,212

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 15/10

23:45-23:59

2 stops40h 14m

Lambert-St Louis

Sat 7/11

16:15-13:35

3 stops52h 20m

$2,393

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

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

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

The month of July is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $754. If you aren’t able to travel to St. Louis during the month of July, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $991.

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

22h 57m

Direct flights

None
The fastest flight from Australia to St. Louis takes 22h 57m
There are no direct flights from Australia to St. Louis. There are no popular flight routes from Australia to St. Louis.
Search flight deals

Frequently asked questions about flying from Australia to 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 refresh daily.

  • How many operators does momondo search 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 CanadaPriceFrom $1,026Free cancellationRating
7.1
11,078 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,031Free cancellationRating
7.4
9,749 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,092Free cancellationRating
7.5
1,041 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,616Free cancellationRating
7.1
11,631 reviews
Search American Airlines flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles

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.

An easier way to manage your 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.
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