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Cheap flights from Australia to St. Louis from $858

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 18/7. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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.
Lufthansa Logo
10:55 - 23:29
MEL
-
STL
27h 34m
2 stops
Lufthansa Logo
12:59 - 08:15
STL
-
MEL
28h 16m
2 stops
$1,390Lufthansa
Thu, 6 Aug - Thu, 13 Aug
American Airlines Logo
09:10 - 10:20
SYD
-
STL
40h 10m
2 stops
American Airlines Logo
10:14 - 06:55
STL
-
SYD
29h 41m
1 stop
$1,448American Airlines
Thu, 10 Sep - Sun, 13 Sep
American Airlines Logo
09:45 - 22:59
MEL
-
STL
28h 14m
1 stop
American Airlines Logo
15:35 - 06:45
STL
-
MEL
24h 10m
2 stops
$1,502American Airlines
Thu, 6 Aug - Thu, 13 Aug
Qantas Airways Logo
09:10 - 22:59
SYD
-
STL
28h 49m
1 stop
Qantas Airways Logo
06:00 - 07:05
STL
-
SYD
34h 05m
1 stop
$1,507Qantas Airways
Sat, 22 Aug - Sat, 29 Aug
Delta Logo
10:00 - 20:35
MEL
-
STL
25h 35m
2 stops
Delta Logo
18:45 - 07:50
STL
-
MEL
46h 05m
2 stops
$1,528Delta
Wed, 9 Sep - Tue, 22 Sep
Multiple Airlines Logo
08:15 - 18:05
MEL
-
STL
24h 50m
2 stops
Multiple Airlines Logo
06:00 - 06:45
STL
-
MEL
33h 45m
1 stop
$1,554Multiple Airlines
Thu, 6 Aug - Thu, 13 Aug
Qantas Airways Logo
13:35 - 18:04
MEL
-
STL
19h 29m
1 stop
Qantas Airways Logo
06:30 - 06:45
STL
-
MEL
33h 15m
1 stop
$1,564Qantas Airways
Wed, 9 Sep - Tue, 22 Sep
United Airlines Logo
10:20 - 17:59
SYD
-
STL
22h 39m
1 stop
United Airlines Logo
08:42 - 06:55
STL
-
SYD
31h 13m
1 stop
$1,571United Airlines
Thu, 10 Sep - Sun, 13 Sep
Multiple Airlines Logo
12:00 - 16:14
SYD
-
STL
19h 14m
1 stop
Multiple Airlines Logo
17:11 - 06:55
STL
-
SYD
22h 44m
1 stop
$1,577Multiple Airlines
Sat, 22 Aug - Sat, 29 Aug
United Airlines Logo
06:10 - 12:40
LST
-
STL
46h 30m
3 stops
United Airlines Logo
08:28 - 15:25
STL
-
LST
38h 57m
2 stops
$2,124United Airlines
Wed, 21 Oct - Sun, 25 Oct

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Air Canada flights from Australia to St. Louis

Our best Air Canada deals on Australia to St. Louis flight tickets
Air Canada
6 Aug
MEL20:45Melbourne
38h 39m
3 stops
STL20:24Lambert-St Louis
10 Aug
STL08:55Lambert-St Louis
35h 40m
3 stops
MEL11:35Melbourne
$1,715
Air Canada
6 Aug
MEL06:00Melbourne
29h 24m
3 stops
STL20:24Lambert-St Louis
10 Aug
STL14:40Lambert-St Louis
29h 55m
3 stops
MEL11:35Melbourne
$1,718
Air Canada
6 Aug
MEL20:45Melbourne
38h 39m
3 stops
STL20:24Lambert-St Louis
10 Aug
STL08:55Lambert-St Louis
35h 40m
3 stops
MEL11:35Melbourne
$1,721

American Airlines flights from Australia to St. Louis

Our best American Airlines deals on Australia to St. Louis flight tickets
American Airlines
10 Sept
SYD09:10Sydney Kingsford Smith
40h 10m
2 stops
STL10:20Lambert-St Louis
13 Sept
STL10:14Lambert-St Louis
29h 41m
1 stop
SYD06:55Sydney Kingsford Smith
$1,448
American Airlines
6 Aug
MEL09:45Melbourne
28h 14m
1 stop
STL22:59Lambert-St Louis
13 Aug
STL15:35Lambert-St Louis
24h 10m
2 stops
MEL06:45Melbourne
$1,502
American Airlines
10 Sept
SYD09:10Sydney Kingsford Smith
27h 38m
2 stops
STL21:48Lambert-St Louis
13 Sept
STL14:30Lambert-St Louis
25h 35m
2 stops
SYD07:05Sydney Kingsford Smith
$1,544

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 12 July 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

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

10:55-23:29

2 stops27h 34m

Lambert-St Louis

Thu 13/8

12:59-08:15

2 stops28h 16m

$1,390

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

09:10-10:20

2 stops40h 10m

Lambert-St Louis

Sun 13/9

10:14-06:55

1 stop29h 41m

$1,448

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

09:45-22:59

1 stop28h 14m

Lambert-St Louis

Thu 13/8

15:35-06:45

2 stops24h 10m

$1,502

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 22/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 29/8

06:00-07:05

1 stop34h 05m

$1,507

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 9/9

10:00-20:35

2 stops25h 35m

Lambert-St Louis

Tue 22/9

18:45-07:50

2 stops46h 05m

$1,528

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

08:15-18:05

2 stops24h 50m

Lambert-St Louis

Thu 13/8

06:00-06:45

1 stop33h 45m

$1,554

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 9/9

13:35-18:04

1 stop19h 29m

Lambert-St Louis

Tue 22/9

06:30-06:45

1 stop33h 15m

$1,564

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

10:20-17:59

1 stop22h 39m

Lambert-St Louis

Sun 13/9

08:42-06:55

1 stop31h 13m

$1,571
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 22/8

12:00-16:14

1 stop19h 14m

Lambert-St Louis

Sat 29/8

17:11-06:55

1 stop22h 44m

$1,577

LauncestonSt. Louis

LST - STL

LSTSTL

Launceston

Wed 21/10

06:10-12:40

3 stops46h 30m

Lambert-St Louis

Sun 25/10

08:28-15:25

2 stops38h 57m

$2,124

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 April is, on average, the cheapest month to fly to St. Louis from Australia, with most prices found around $1,016. If you aren’t able to travel to St. Louis during the month of April, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $1,058.

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

You could potentially save up to 1% 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

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 $1,052Free cancellationRating
7.1
11,332 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,058Free cancellationRating
7.4
9,979 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,120Free cancellationRating
7.5
1,061 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,657Free cancellationRating
7.1
11,809 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.

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