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Cheap flights from Australia to St. Louis from $1,021

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
26 Mar — 2 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Australia to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Australia to St. Louis
Explore the most affordable flight options available from Australia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 February 2026.

Thu 12/319:40
BNE
-
STL
2 stops28h 11m
American Airlines
Mon 16/314:31
STL
-
BNE
2 stops47h 29m
American Airlines
Deal found 24/2$1,108
Wed 18/312:00
MEL
-
STL
2 stops27h 34m
United Airlines
Sun 22/308:17
STL
-
MEL
2 stops32h 43m
United Airlines
Deal found 23/2$1,265
Wed 18/316:05
MEL
-
STL
1 stop19h 24m
American Airlines
Sun 22/306:38
STL
-
MEL
1 stop34h 52m
American Airlines
Deal found 23/2$1,353
Mon 7/910:55
MEL
-
STL
1 stop21h 58m
United Airlines
Sun 27/905:20
STL
-
MEL
2 stops35h 55m
United Airlines
Deal found 21/2$1,493
Thu 12/311:20
SYD
-
STL
2 stops28h 39m
American Airlines
Mon 16/314:31
STL
-
SYD
2 stops26h 29m
American Airlines
Deal found 20/2$1,497
Thu 6/812:00
SYD
-
STL
1 stop19h 51m
Qantas Airways
Sun 30/819:46
STL
-
SYD
1 stop20h 09m
Qantas Airways
Deal found 20/2$1,499
Thu 4/609:10
SYD
-
STL
2 stops25h 30m
American Airlines
Mon 8/614:38
STL
-
SYD
2 stops25h 27m
American Airlines
Deal found 23/2$1,516
Thu 6/809:30
SYD
-
STL
2 stops28h 14m
United Airlines
Sun 30/819:06
STL
-
SYD
1 stop20h 49m
United Airlines
Deal found 20/2$1,523
Thu 12/311:50
SYD
-
STL
1 stop26h 26m
United Airlines
Mon 16/316:47
STL
-
SYD
1 stop22h 13m
United Airlines
Deal found 20/2$1,524
Thu 4/610:20
SYD
-
STL
1 stop22h 57m
United Airlines
Mon 8/614:57
STL
-
SYD
2 stops25h 03m
United Airlines
Deal found 23/2$1,526
Thu 30/717:50
SYD
-
STL
1 stop21h 09m
American Airlines
Sun 9/815:33
STL
-
SYD
2 stops24h 32m
American Airlines
Deal found 23/2$1,527
Fri 10/413:30
MEL
-
STL
2 stops25h 27m
Multiple Airlines
Fri 17/406:21
STL
-
MEL
2 stops49h 14m
Multiple Airlines
Deal found 23/2$1,635

Find flight deals from Australia to St. Louis

Keep the following information in mind while searching for Australia to St. Louis flight deals. Data was last updated 24 February 2026.

Round-trip from

$1,109

One-way from

$1,021

Popular in

July

Cheapest in

August

Average price

$1,769
American Airlines
  • American Airlines
  • 12/3-16/3
  • 2 total stops
  • 50h 40m total
  • Australia to St. Louis
Search Deals
Air New Zealand
  • Air New Zealand
  • 29/4
  • 2 total stops
  • 25h 08m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($90 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($76 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights 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, Cheapflights users made 647,157 searches. Data last updated 24 February 2026.
Use the filters below to find and compare flights from Australia to St. Louis that are best for you.

Fly from

Australia

Fly to

St. Louis

Route

Depart

Return

Price

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 12/3

19:40-08:51

2 stops28h 11m

Lambert-St Louis

Mon 16/3

14:31-05:00

2 stops47h 29m

$1,108

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 18/3

10:30-18:00

2 stops23h 30m

Lambert-St Louis

Sun 22/3

06:51-09:00

1 stop34h 09m

$1,265

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:20-23:58

1 stop28h 38m

Lambert-St Louis

Mon 16/3

06:38-09:00

1 stop34h 22m

$1,504

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/8

09:30-16:33

2 stops22h 03m

Lambert-St Louis

Sun 30/8

13:27-06:55

2 stops26h 28m

$1,523

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/8

17:50-23:08

1 stop20h 18m

Lambert-St Louis

Sun 30/8

19:46-06:55

1 stop20h 09m

$1,526

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/6

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 8/6

14:57-07:00

2 stops25h 03m

$1,526

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

12:00-19:46

2 stops22h 46m

Lambert-St Louis

Sun 9/8

15:33-07:05

2 stops24h 32m

$1,527

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:50-22:16

1 stop26h 26m

Lambert-St Louis

Mon 16/3

16:47-07:00

1 stop22h 13m

$1,530

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 28/4

10:20-19:31

2 stops24h 11m

Lambert-St Louis

Fri 1/5

16:44-07:00

2 stops23h 16m

$1,565

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 31/8

13:30-06:55

2 stops26h 25m

$1,571

Flights are sorted by cheapest return flights first.

Deals found on 24/2

Showing 1-10 of 23 results
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Best time to book a flight from Australia to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Australia with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Australia to St. Louis

What is the cheapest month to book a flight from Australia to St. Louis?

Currently, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,050). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,570). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated 24 February 2026.
Read reviews from past customers who have flown with Qantas Airways, United Airlines, andAir Canada from Australia to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
997 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Qantas Airways
7.5
Good
997 reviews
Qantas Airways
7.5
Good
997 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
United Airlines
7.4
Good
9,344 reviews
Qantas Airways
7.5
Good
997 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Air Canada
7.1
Good
10,742 reviews
Qantas Airways
7.5
Good
997 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Overall

7.5

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.

Related info for your journey

Find useful and relevant information for your journey from Australia to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Australia?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Australia. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

  • How long is the flight from Australia to St. Louis?

    American Airlines, United Airlines, and Qantas Airways can get you from Australia to St. Louis in just under 23h 30m. Your travel time can differ by up to 5h 29m. Airlines will cover a distance of 15255 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Australia to St. Louis?

    Most travellers choose Melbourne - Lambert-St Louis, Sydney Kingsford Smith - Lambert-St Louis or Devonport - Lambert-St Louis when deciding on the best route from Australia to St. Louis.

  • Can I find deals for flights from Australia to St. Louis that include hotel bookings?

    Yes. In addition to deals on Australia to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Australia to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Australia to St. Louis.

  • Can I find deals for business class flights from Australia to St. Louis?

    Yes. Cheapflights offers flight deals from Australia to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Australia to St. Louis?

    Currently, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,050). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,570). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Australia to St. Louis

Discover the top 3 airlines that operate flights from Australia to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 24 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$755Average$1,887FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,037Average$1,580FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,376Average$1,960FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Australia to St. Louis?

When you search for this flight from Australia to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Australia to St. Louis?

Cheapflights simply makes it quick and affordable to book flights from Australia to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Australia to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Australia to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Australia to St. Louis become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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