Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Australia to St. Louis from $635

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 6/8. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Australia to St. Louis

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

Enter your travel dates to find the best prices.
American Airlines Logo
9:10 am - 4:33 pm
SYD
-
STL
22h 23m
2 stops
American Airlines Logo
8:39 pm - 7:05 am
STL
-
SYD
43h 26m
2 stops
$1,009American Airlines
Thu, Jun 4 - Sat, Jun 13
American Airlines Logo
9:10 am - 6:30 pm
SYD
-
STL
24h 20m
2 stops
American Airlines Logo
8:39 pm - 7:05 am
STL
-
SYD
43h 26m
2 stops
$1,010American Airlines
Thu, Jun 4 - Sat, Jun 13
Qantas Airways Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
Qantas Airways Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
$1,021Qantas Airways
Thu, Jun 4 - Sat, Jun 13
United Airlines Logo
10:20 am - 6:17 pm
SYD
-
STL
22h 57m
1 stop
United Airlines Logo
7:05 pm - 6:55 am
STL
-
SYD
44h 50m
2 stops
$1,028United Airlines
Thu, Jun 4 - Sat, Jun 13
Air Canada Logo
9:20 am - 6:42 pm
SYD
-
STL
48h 22m
2 stops
Air Canada Logo
8:55 am - 7:20 am
STL
-
SYD
31h 25m
2 stops
$1,046Air Canada
Mon, Aug 10 - Fri, Sep 4
Qantas Airways Logo
9:10 am - 11:56 pm
SYD
-
STL
29h 46m
1 stop
Qantas Airways Logo
6:35 am - 7:05 am
STL
-
SYD
33h 30m
1 stop
$1,054Qantas Airways
Thu, Jun 4 - Sat, Jun 13
United Airlines Logo
10:55 am - 3:38 pm
MEL
-
STL
43h 43m
2 stops
United Airlines Logo
7:00 am - 8:15 am
STL
-
MEL
34h 15m
1 stop
$1,278United Airlines
Mon, Sep 7 - Sun, Sep 27
Air Canada Logo
8:30 pm - 8:09 pm
MEL
-
STL
38h 39m
3 stops
Air Canada Logo
8:40 am - 11:35 am
STL
-
MEL
35h 55m
3 stops
$1,366Air Canada
Wed, Jun 3 - Sun, Jun 7
Multiple Airlines Logo
7:00 am - 8:00 pm
MEL
-
STL
29h 00m
3 stops
Multiple Airlines Logo
4:15 pm - 1:35 pm
STL
-
MEL
52h 20m
3 stops
$1,578Multiple Airlines
Thu, Oct 15 - Sat, Nov 7
Multiple Airlines Logo
11:45 pm - 11:59 pm
MEL
-
STL
40h 14m
2 stops
Multiple Airlines Logo
4:15 pm - 1:35 pm
STL
-
MEL
52h 20m
3 stops
$1,707Multiple Airlines
Thu, Oct 15 - Sat, Nov 7

Air Canada flights from Australia to St. Louis

Our best Air Canada deals on Australia to St. Louis flight tickets
Air Canada
Aug 10
SYD9:20 amSydney Kingsford Smith
48h 22m
2 stops
STL6:42 pmLambert-St Louis
Sep 4
STL8:55 amLambert-St Louis
31h 25m
2 stops
SYD7:20 amSydney Kingsford Smith
$1,046
Air Canada
Jul 29
SYD9:20 amSydney Kingsford Smith
43h 42m
2 stops
STL2:02 pmLambert-St Louis
Jul 31
STL4:48 pmLambert-St Louis
23h 32m
2 stops
SYD7:20 amSydney Kingsford Smith
$1,083
Air Canada
Aug 10
SYD9:20 amSydney Kingsford Smith
48h 22m
3 stops
STL6:42 pmLambert-St Louis
Sep 4
STL8:55 amLambert-St Louis
31h 25m
2 stops
SYD7:20 amSydney Kingsford Smith
$1,085

United Airlines flights from Australia to St. Louis

Our best United Airlines deals on Australia to St. Louis flight tickets
United Airlines
Jun 4
SYD10:20 amSydney Kingsford Smith
22h 57m
1 stop
STL6:17 pmLambert-St Louis
Jun 13
STL7:05 pmLambert-St Louis
44h 50m
2 stops
SYD6:55 amSydney Kingsford Smith
$1,028
United Airlines
Jun 4
SYD10:20 amSydney Kingsford Smith
22h 57m
1 stop
STL6:17 pmLambert-St Louis
Jun 13
STL7:23 pmLambert-St Louis
20h 32m
1 stop
SYD6:55 amSydney Kingsford Smith
$1,078
United Airlines
Jun 12
SYD9:30 amSydney Kingsford Smith
26h 40m
2 stops
STL9:10 pmLambert-St Louis
Jul 5
STL6:00 amLambert-St Louis
33h 55m
2 stops
SYD6:55 amSydney Kingsford Smith
$1,079

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated May 24, 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 round-trip

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/4

9:10 am-4:33 pm

2 stops22h 23m

Lambert-St Louis

Sat 6/13

8:39 pm-7:05 am

2 stops43h 26m

$1,009

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/4

9:10 am-6:30 pm

2 stops24h 20m

Lambert-St Louis

Sat 6/13

8:39 pm-7:05 am

2 stops43h 26m

$1,010
Quickest round-trip

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/4

9:10 am-11:56 pm

1 stop29h 46m

Lambert-St Louis

Sat 6/13

6:35 am-7:05 am

1 stop33h 30m

$1,021

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/4

10:20 am-6:17 pm

1 stop22h 57m

Lambert-St Louis

Sat 6/13

7:05 pm-6:55 am

2 stops44h 50m

$1,028

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/10

9:20 am-6:42 pm

2 stops48h 22m

Lambert-St Louis

Fri 9/4

8:55 am-7:20 am

2 stops31h 25m

$1,046

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/4

9:10 am-11:56 pm

1 stop29h 46m

Lambert-St Louis

Sat 6/13

6:35 am-7:05 am

1 stop33h 30m

$1,054

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 9/7

10:55 am-3:38 pm

2 stops43h 43m

Lambert-St Louis

Sun 9/27

7:00 am-8:15 am

1 stop34h 15m

$1,278

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 6/3

8:30 pm-8:09 pm

3 stops38h 39m

Lambert-St Louis

Sun 6/7

8:40 am-11:35 am

3 stops35h 55m

$1,366

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 10/15

7:00 am-8:00 pm

3 stops29h 00m

Lambert-St Louis

Sat 11/7

4:15 pm-1:35 pm

3 stops52h 20m

$1,578

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 10/15

11:45 pm-11:59 pm

2 stops40h 14m

Lambert-St Louis

Sat 11/7

4:15 pm-1:35 pm

3 stops52h 20m

$1,707

Flights are sorted by cheapest round-trip 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?

In general, July 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 $538. The month of April is another great option to travel to St. Louis, with average flight prices from Australia averaging around $707.

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 are updated 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?

    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 AirlinesPriceFrom $822Free CancellationRating
7.4
9,749 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Eureka
Clayton
Litchfield
Edwardsville
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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 6/23
Tue 6/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States