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Cheap flights from Australia to St. Louis from $1,543

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
15 May — 22 May1
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 15 April 2026.

Fri 29/506:00
MEL
-
STL
3 stops45h 06m
Air Canada
Tue 2/614:15
STL
-
MEL
3 stops30h 20m
Air Canada
Deal found 13/4$1,543
Fri 15/506:00
MEL
-
STL
3 stops29h 09m
Air Canada
Fri 22/507:05
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 12/4$1,587
Tue 12/520:30
MEL
-
STL
3 stops54h 36m
Air Canada
Tue 19/507:05
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 14/4$1,593
Tue 12/509:45
MEL
-
STL
1 stop29h 14m
American Airlines
Tue 19/512:27
STL
-
MEL
2 stops27h 18m
American Airlines
Deal found 14/4$1,608
Sun 10/509:45
MEL
-
STL
1 stop29h 14m
American Airlines
Sun 17/506:21
STL
-
MEL
1 stop33h 24m
American Airlines
Deal found 12/4$1,610
Fri 15/510:55
MEL
-
STL
2 stops24h 48m
United Airlines
Fri 22/513:13
STL
-
MEL
2 stops27h 17m
United Airlines
Deal found 12/4$1,625
Sun 10/510:00
MEL
-
STL
2 stops24h 03m
Delta
Sun 17/515:11
STL
-
MEL
2 stops49h 39m
Delta
Deal found 12/4$1,636
Tue 12/510:55
MEL
-
STL
2 stops25h 18m
Multiple Airlines
Tue 19/510:25
STL
-
MEL
2 stops30h 50m
Multiple Airlines
Deal found 14/4$1,643
Wed 27/509:20
SYD
-
STL
2 stops26h 05m
Air Canada
Wed 3/613:05
STL
-
SYD
2 stops51h 15m
Air Canada
Deal found 12/4$1,699
Wed 20/509:20
SYD
-
STL
2 stops41h 46m
Multiple Airlines
Thu 28/516:48
STL
-
SYD
2 stops23h 32m
Multiple Airlines
Deal found 11/4$1,702
Tue 12/509:45
MEL
-
STL
1 stop29h 14m
Qantas Airways
Tue 19/506:21
STL
-
MEL
1 stop33h 24m
Qantas Airways
Deal found 14/4$1,706
Wed 20/509:20
SYD
-
STL
2 stops26h 23m
Air Canada
Thu 11/616:48
STL
-
SYD
2 stops23h 32m
Air Canada
Deal found 13/4$1,750

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 15 April 2026.

Round-trip from

$1,543

Popular in

July

Cheapest in

September

Average price

$2,305
Air Canada
  • Air Canada
  • 29/5-2/6
  • 6 total stops
  • 75h 26m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($220 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($63 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 15 April 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

Fri 29/5

06:00-12:06

3 stops45h 06m

Lambert-St Louis

Tue 2/6

08:40-11:05

3 stops35h 25m

$1,543

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 15/5

10:55-20:43

2 stops24h 48m

Lambert-St Louis

Fri 22/5

19:23-08:15

1 stop21h 52m

$1,625

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 10/5

10:00-19:03

2 stops24h 03m

Lambert-St Louis

Sun 17/5

15:11-07:50

2 stops49h 39m

$1,636

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 3/6

13:05-07:20

2 stops51h 15m

$1,711

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Thu 28/5

16:48-07:20

2 stops23h 32m

$1,767

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

09:20-20:25

2 stops26h 05m

Lambert-St Louis

Thu 28/5

13:05-07:20

3 stops51h 15m

$1,778

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 7/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Mon 11/5

17:59-07:20

2 stops46h 21m

$1,850

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 13/8

10:20-18:24

1 stop23h 04m

Lambert-St Louis

Sun 6/9

13:18-07:00

2 stops26h 42m

$2,080

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Sat 29/8

13:18-06:55

2 stops26h 37m

$2,152
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 20/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Thu 28/5

19:23-06:55

1 stop20h 32m

$2,153

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 27 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, May is the cheapest month in which you can book a flight from Australia to St. Louis (average of $912). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,604). 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 15 April 2026.
Read reviews from past customers who have flown with Qantas Airways,United Airlines, andAmerican Airlines 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
1,019 reviews
Check prices

Boarding

7.7

Food

7.0

Crew

8.1

Comfort

7.5

Overall

7.5

Entertainment

7.2

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
1,019 reviews
Qantas Airways
7.5
Good
1,019 reviews
Check prices

Boarding

7.7

Food

7.0

Crew

8.1

Comfort

7.5

Overall

7.5

Entertainment

7.2

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
9,592 reviews
Qantas Airways
7.5
Good
1,019 reviews
Check prices

Boarding

7.7

Food

7.0

Crew

8.1

Comfort

7.5

Overall

7.5

Entertainment

7.2

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
American Airlines
7.1
Good
11,581 reviews
Qantas Airways
7.5
Good
1,019 reviews
Check prices

Boarding

7.7

Food

7.0

Crew

8.1

Comfort

7.5

Overall

7.5

Entertainment

7.2

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
10,929 reviews
Qantas Airways
7.5
Good
1,019 reviews
Check prices

Boarding

7.7

Food

7.0

Crew

8.1

Comfort

7.5

Overall

7.5

Entertainment

7.2

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?

    Air Canada, United Airlines, and Delta can get you from Australia to St. Louis in just under 24h 03m. Your travel time can differ by up to 21h 03m. 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 Sydney Kingsford Smith - Lambert-St Louis, Melbourne - Lambert-St Louis or Brisbane - 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, May is the cheapest month in which you can book a flight from Australia to St. Louis (average of $912). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,604). 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 4 airlines flying from Australia to St. Louis

Discover the top 4 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 15 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$749Average$1,743FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,029Average$1,547FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,095Average$1,939FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,620Average$1,763FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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