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Cheap flights from Australia to St. Louis from $780

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
27 Feb — 6 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 28 January 2026.

Thu 5/219:40
BNE
-
STL
2 stops20h 19m
American Airlines
Mon 9/208:31
STL
-
BNE
2 stops28h 29m
American Airlines
Deal found 26/1$1,107
Sun 8/319:40
BNE
-
STL
1 stop19h 18m
American Airlines
Mon 16/311:41
STL
-
BNE
2 stops26h 49m
American Airlines
Deal found 26/1$1,108
Fri 13/308:40
BNE
-
STL
1 stop23h 33m
Qantas Airways
Fri 20/318:50
STL
-
BNE
1 stop19h 40m
Qantas Airways
Deal found 26/1$1,110
Sun 8/310:40
BNE
-
STL
2 stops27h 45m
Delta
Mon 16/313:39
STL
-
BNE
2 stops26h 41m
Delta
Deal found 26/1$1,121
Fri 13/310:10
BNE
-
STL
2 stops24h 19m
Multiple Airlines
Fri 20/318:50
STL
-
BNE
1 stop19h 40m
Multiple Airlines
Deal found 26/1$1,146
Mon 16/209:40
BNE
-
STL
1 stop25h 49m
Qantas Airways
Fri 6/306:38
STL
-
BNE
1 stop30h 22m
Qantas Airways
Deal found 27/1$1,244
Mon 16/211:40
BNE
-
STL
2 stops26h 37m
United Airlines
Fri 6/305:00
STL
-
BNE
2 stops34h 30m
United Airlines
Deal found 27/1$1,272
Fri 13/309:10
MEL
-
STL
2 stops24h 43m
Delta
Fri 20/307:03
STL
-
MEL
2 stops31h 57m
Delta
Deal found 27/1$1,272
Wed 25/210:10
MEL
-
STL
2 stops31h 15m
Delta
Wed 4/314:22
STL
-
MEL
2 stops24h 38m
Delta
Deal found 27/1$1,277
Thu 12/312:00
MEL
-
STL
2 stops24h 41m
United Airlines
Thu 19/306:51
STL
-
MEL
1 stop34h 09m
United Airlines
Deal found 26/1$1,307
Fri 3/410:30
MEL
-
STL
2 stops38h 55m
United Airlines
Tue 14/416:49
STL
-
MEL
2 stops24h 26m
United Airlines
Deal found 25/1$1,308
Wed 25/211:30
MEL
-
STL
3 stops27h 44m
United Airlines
Wed 4/316:28
STL
-
MEL
2 stops24h 02m
United Airlines
Deal found 27/1$1,316

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 28 January 2026.

Round-trip from

$1,107

One-way from

$780

Popular in

December

Cheapest in

August

Average price

$1,897
American Airlines
  • American Airlines
  • 16/2-6/3
  • 2 total stops
  • 50h 41m total
  • Australia to St. Louis
Search Deals
Delta
  • Delta
  • 17/4
  • 2 total stops
  • 26h 19m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($185 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($80 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 28 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

Sun 8/3

19:40-23:58

1 stop19h 18m

Lambert-St Louis

Mon 16/3

06:38-05:00

1 stop31h 22m

$1,107

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 16/2

19:40-23:59

1 stop20h 19m

Lambert-St Louis

Fri 6/3

06:38-05:00

1 stop30h 22m

$1,107

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 13/3

08:40-17:13

1 stop23h 33m

Lambert-St Louis

Fri 20/3

18:50-05:30

1 stop19h 40m

$1,110

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:40-22:25

2 stops27h 45m

Lambert-St Louis

Mon 16/3

13:39-07:20

2 stops26h 41m

$1,121

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 13/3

09:40-23:25

2 stops28h 45m

Lambert-St Louis

Fri 20/3

13:39-07:20

2 stops26h 41m

$1,121

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 13/3

10:10-19:29

2 stops24h 19m

Lambert-St Louis

Fri 20/3

18:50-05:30

1 stop19h 40m

$1,146

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 16/2

09:40-19:29

1 stop25h 49m

Lambert-St Louis

Fri 6/3

06:38-05:00

1 stop30h 22m

$1,244

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 16/2

11:40-13:14

2 stops41h 34m

Lambert-St Louis

Fri 6/3

06:00-07:30

2 stops33h 30m

$1,272

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 13/3

09:10-17:53

2 stops24h 43m

Lambert-St Louis

Fri 20/3

07:03-07:00

2 stops31h 57m

$1,272

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 25/2

10:10-00:25

2 stops31h 15m

Lambert-St Louis

Wed 4/3

14:22-08:00

2 stops24h 38m

$1,277

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Showing 1-10 of 35 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 $1,071). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,595). 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 28 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
978 reviews
Check prices

Overall

7.5

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

Entertainment

7.2

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
978 reviews
Qantas Airways
7.5
Good
978 reviews
Check prices

Overall

7.5

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

Entertainment

7.2

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
9,213 reviews
Qantas Airways
7.5
Good
978 reviews
Check prices

Overall

7.5

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

Entertainment

7.2

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
10,666 reviews
Qantas Airways
7.5
Good
978 reviews
Check prices

Overall

7.5

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

Entertainment

7.2

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, Qantas Airways, and Delta can get you from Australia to St. Louis in just under 19h 18m. Your travel time can differ by up to 8h 27m. 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 $1,071). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,595). 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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,053Average$1,661FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,178Average$1,692FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,398Average$2,033FlexibilityNo 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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