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Cheap flights from Australia to St. Louis from $782

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
2 Mar — 9 Mar1
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 31 January 2026.

Thu 5/219:40
BNE
-
STL
2 stops29h 11m
American Airlines
Mon 9/211:55
STL
-
BNE
2 stops25h 05m
American Airlines
Deal found 30/1$1,108
Mon 16/310:10
BNE
-
STL
2 stops24h 19m
Multiple Airlines
Mon 23/316:13
STL
-
BNE
2 stops26h 12m
Multiple Airlines
Deal found 30/1$1,161
Tue 5/510:00
BNE
-
STL
2 stops49h 05m
Air Canada
Mon 3/812:10
STL
-
BNE
2 stops27h 55m
Air Canada
Deal found 30/1$1,307
Sun 15/310:30
MEL
-
STL
2 stops42h 49m
United Airlines
Sun 22/310:00
STL
-
MEL
2 stops30h 30m
United Airlines
Deal found 29/1$1,317
Sat 28/312:00
MEL
-
STL
1 stop27h 58m
American Airlines
Sat 4/407:03
STL
-
MEL
1 stop30h 57m
American Airlines
Deal found 30/1$1,355
Sat 28/312:00
MEL
-
STL
1 stop27h 58m
American Airlines
Sun 5/414:31
STL
-
MEL
2 stops25h 14m
American Airlines
Deal found 29/1$1,362
Sat 28/312:00
MEL
-
STL
1 stop27h 58m
Qantas Airways
Sat 4/409:35
STL
-
MEL
1 stop28h 25m
Qantas Airways
Deal found 29/1$1,412
Thu 19/211:20
SYD
-
STL
2 stops22h 53m
American Airlines
Mon 23/210:37
STL
-
SYD
2 stops29h 23m
American Airlines
Deal found 30/1$1,498
Tue 3/314:05
SYD
-
STL
1 stop20h 08m
American Airlines
Mon 13/406:20
STL
-
SYD
1 stop33h 45m
American Airlines
Deal found 29/1$1,513
Mon 16/311:20
SYD
-
STL
1 stop28h 38m
American Airlines
Mon 23/314:31
STL
-
SYD
2 stops26h 29m
American Airlines
Deal found 30/1$1,520
Mon 16/313:05
SYD
-
STL
1 stop20h 08m
Multiple Airlines
Mon 23/316:13
STL
-
SYD
1 stop22h 42m
Multiple Airlines
Deal found 30/1$1,521
Mon 16/311:50
SYD
-
STL
1 stop26h 26m
United Airlines
Mon 23/316:47
STL
-
SYD
1 stop22h 13m
United Airlines
Deal found 31/1$1,524

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 31 January 2026.

Round-trip from

$1,118

Popular in

December

Cheapest in

August

Average price

$1,884
American Airlines
  • American Airlines
  • 16/3-23/3
  • 3 total stops
  • 43h 29m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($182 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($78 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 31 January 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

Mon 16/3

19:40-23:58

1 stop19h 18m

Lambert-St Louis

Mon 23/3

14:19-05:30

2 stops24h 11m

$1,118

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 16/3

10:10-19:29

2 stops24h 19m

Lambert-St Louis

Mon 23/3

16:13-09:25

2 stops26h 12m

$1,161

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Tue 5/5

10:00-20:05

2 stops49h 05m

Lambert-St Louis

Mon 3/8

12:10-07:05

2 stops27h 55m

$1,307

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 15/3

10:30-13:19

2 stops42h 49m

Lambert-St Louis

Sun 22/3

10:00-09:00

2 stops31h 00m

$1,317

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

12:00-23:58

1 stop27h 58m

Lambert-St Louis

Sat 4/4

07:03-06:00

1 stop30h 57m

$1,355

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

12:00-23:58

1 stop27h 58m

Lambert-St Louis

Sun 5/4

14:31-06:45

2 stops25h 14m

$1,362

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

12:00-23:58

1 stop27h 58m

Lambert-St Louis

Sat 4/4

09:35-06:00

1 stop28h 25m

$1,412

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-17:13

2 stops22h 53m

Lambert-St Louis

Mon 23/2

10:37-09:00

2 stops29h 23m

$1,498

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 3/3

11:20-17:58

2 stops23h 38m

Lambert-St Louis

Mon 13/4

16:46-07:05

2 stops23h 19m

$1,501

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 16/3

11:20-23:58

1 stop28h 38m

Lambert-St Louis

Mon 23/3

14:31-09:00

2 stops26h 29m

$1,520

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 31 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 $1,064). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,584). 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 31 January 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
982 reviews
Check prices

Overall

7.5

Entertainment

7.2

Comfort

7.5

Food

7.0

Crew

8.2

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jan 2026

SYD - LAX

Flight Cancelled after sitting on plane for 1 1/2 hours. Didn't fly till next day. Incurred change fees on my connection in LAX. Next Day flight late. Missed connection on American in LA. AA couldn't rebook. Had to pay $800 to rebook on SW Air.
Qantas Airways
7.5
Good
982 reviews
Qantas Airways
7.5
Good
982 reviews
Check prices

Overall

7.5

Entertainment

7.2

Comfort

7.5

Food

7.0

Crew

8.2

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jan 2026

SYD - LAX

Flight Cancelled after sitting on plane for 1 1/2 hours. Didn't fly till next day. Incurred change fees on my connection in LAX. Next Day flight late. Missed connection on American in LA. AA couldn't rebook. Had to pay $800 to rebook on SW Air.
United Airlines
7.4
Good
9,219 reviews
Qantas Airways
7.5
Good
982 reviews
Check prices

Overall

7.5

Entertainment

7.2

Comfort

7.5

Food

7.0

Crew

8.2

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jan 2026

SYD - LAX

Flight Cancelled after sitting on plane for 1 1/2 hours. Didn't fly till next day. Incurred change fees on my connection in LAX. Next Day flight late. Missed connection on American in LA. AA couldn't rebook. Had to pay $800 to rebook on SW Air.
Air Canada
7.1
Good
10,668 reviews
Qantas Airways
7.5
Good
982 reviews
Check prices

Overall

7.5

Entertainment

7.2

Comfort

7.5

Food

7.0

Crew

8.2

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jan 2026

SYD - LAX

Flight Cancelled after sitting on plane for 1 1/2 hours. Didn't fly till next day. Incurred change fees on my connection in LAX. Next Day flight late. Missed connection on American in LA. AA couldn't rebook. Had to pay $800 to rebook on SW Air.

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, Air Canada, and United Airlines can get you from Australia to St. Louis in just under 19h 18m. Your travel time can differ by up to 29h 47m. Airlines will cover a distance of 14074 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 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, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,064). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,584). 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

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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 31 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,046Average$1,650FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,170Average$1,681FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,388Average$2,019FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

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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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