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Cheap flights from Australia to St. Louis from $920

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
9 Apr — 16 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 10 March 2026.

Mon 20/409:45
MEL
-
STL
1 stop29h 12m
American Airlines
Mon 27/414:37
STL
-
MEL
2 stops25h 08m
American Airlines
Deal found 6/3$1,281
Wed 25/310:30
MEL
-
STL
2 stops22h 19m
United Airlines
Sun 29/318:05
STL
-
MEL
2 stops46h 25m
United Airlines
Deal found 5/3$1,345
Wed 27/509:10
SYD
-
STL
2 stops22h 23m
American Airlines
Sun 31/509:08
STL
-
SYD
2 stops30h 57m
American Airlines
Deal found 5/3$1,580
Wed 5/811:55
SYD
-
STL
2 stops37h 12m
Air New Zealand
Sat 29/815:02
STL
-
SYD
2 stops26h 43m
Air New Zealand
Deal found 9/3$1,590
Thu 23/409:45
MEL
-
STL
1 stop29h 12m
Qantas Airways
Thu 30/406:21
STL
-
MEL
1 stop33h 24m
Qantas Airways
Deal found 9/3$1,593
Wed 27/510:20
SYD
-
STL
1 stop22h 57m
United Airlines
Sun 31/519:23
STL
-
SYD
1 stop20h 32m
United Airlines
Deal found 5/3$1,606
Mon 20/410:00
BNE
-
STL
2 stops44h 25m
Air Canada
Mon 27/416:05
STL
-
BNE
2 stops48h 00m
Air Canada
Deal found 6/3$1,615
Tue 21/409:20
SYD
-
STL
2 stops26h 34m
Air Canada
Tue 28/416:30
STL
-
SYD
2 stops23h 50m
Air Canada
Deal found 7/3$1,666
Sat 8/809:55
SYD
-
STL
2 stops25h 47m
Air New Zealand
Mon 31/808:52
STL
-
SYD
2 stops32h 53m
Air New Zealand
Deal found 9/3$1,673
Thu 23/413:30
MEL
-
STL
2 stops25h 27m
Multiple Airlines
Thu 30/406:21
STL
-
MEL
2 stops38h 39m
Multiple Airlines
Deal found 9/3$1,746
Sun 3/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Sun 17/507:05
STL
-
SYD
2 stops57h 15m
Air Canada
Deal found 8/3$1,777
Wed 27/520:30
MEL
-
STL
3 stops38h 34m
Air Canada
Sun 31/507:05
STL
-
MEL
3 stops37h 00m
Air Canada
Deal found 9/3$1,784

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 10 March 2026.

Round-trip from

$1,281

One-way from

$920

Popular in

July

Cheapest in

May

Average price

$1,706
American Airlines
  • American Airlines
  • 20/4-27/4
  • 3 total stops
  • 54h 20m total
  • Australia to St. Louis
Search Deals
Air New Zealand
  • Air New Zealand
  • 16/5
  • 2 total stops
  • 27h 50m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($140 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 10 March 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

Mon 20/4

14:05-23:57

2 stops24h 52m

Lambert-St Louis

Mon 27/4

14:37-06:45

2 stops25h 08m

$1,323

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 25/3

10:30-16:49

2 stops22h 19m

Lambert-St Louis

Sun 29/3

18:05-08:30

2 stops46h 25m

$1,345

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:10-23:56

1 stop29h 46m

Lambert-St Louis

Sun 31/5

14:37-07:05

2 stops25h 28m

$1,580
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Sun 31/5

19:23-06:55

1 stop20h 32m

$1,606

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 20/4

10:00-15:25

2 stops44h 25m

Lambert-St Louis

Mon 27/4

16:05-07:05

2 stops48h 00m

$1,615

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 21/4

09:20-20:54

2 stops26h 34m

Lambert-St Louis

Tue 28/4

16:30-07:20

2 stops23h 50m

$1,666

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 23/4

13:30-23:57

2 stops25h 27m

Lambert-St Louis

Thu 30/4

06:21-12:00

2 stops38h 39m

$1,746

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 17/5

07:05-07:20

2 stops57h 15m

$1,777

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

11:55-10:07

2 stops37h 12m

Lambert-St Louis

Mon 31/8

15:02-08:45

2 stops26h 43m

$1,933

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 24/4

09:20-15:25

2 stops45h 05m

Lambert-St Louis

Fri 1/5

14:35-07:20

2 stops25h 45m

$1,933

Flights are sorted by cheapest return flights first.

Deals found on 6/3

Showing 1-10 of 36 resultsSorted by cheapest first
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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 $1,055). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,610). 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 10 March 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
1,002 reviews
Check prices

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

Boarding

7.7

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
1,002 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

Boarding

7.7

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
9,409 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

Boarding

7.7

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
10,800 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

Boarding

7.7

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 Air Canada can get you from Australia to St. Louis in just under 22h 19m. Your travel time can differ by up to 22h 06m. 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 $1,055). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,610). 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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$1,865FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,042Average$1,501FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,124Average$1,964FlexibilityNo 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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