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Cheap flights from Australia to St. Louis from $842

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 20/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
20 Feb — 27 Feb1
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 21 January 2026.

Thu 5/209:40
BNE
-
STL
1 stop21h 07m
American Airlines
Mon 9/207:04
STL
-
BNE
1 stop29h 56m
American Airlines
Deal found 19/1$1,254
Thu 5/211:40
BNE
-
STL
1 stop19h 57m
United Airlines
Mon 9/206:45
STL
-
BNE
1 stop32h 45m
United Airlines
Deal found 18/1$1,271
Fri 27/310:30
MEL
-
STL
2 stops22h 29m
United Airlines
Sun 5/419:05
STL
-
MEL
1 stop22h 10m
United Airlines
Deal found 19/1$1,312
Fri 27/309:10
MEL
-
STL
2 stops31h 11m
Delta
Sun 5/418:59
STL
-
MEL
2 stops45h 51m
Delta
Deal found 19/1$1,322
Fri 27/310:30
MEL
-
STL
2 stops22h 29m
Air New Zealand
Sat 4/419:05
STL
-
MEL
1 stop22h 10m
Air New Zealand
Deal found 19/1$1,398
Tue 17/211:20
SYD
-
STL
2 stops45h 09m
Air Canada
Tue 24/208:41
STL
-
SYD
2 stops31h 54m
Air Canada
Deal found 18/1$1,606
Tue 3/211:20
SYD
-
STL
2 stops44h 55m
Air Canada
Tue 17/208:41
STL
-
SYD
2 stops55h 54m
Air Canada
Deal found 19/1$1,699
Wed 4/311:20
SYD
-
STL
2 stops42h 59m
Air Canada
Wed 11/316:05
STL
-
SYD
2 stops48h 30m
Air Canada
Deal found 18/1$1,701
Thu 19/211:20
SYD
-
STL
2 stops26h 06m
Air Canada
Mon 23/208:41
STL
-
SYD
2 stops31h 54m
Air Canada
Deal found 17/1$1,719
Thu 19/211:20
SYD
-
STL
1 stop29h 39m
American Airlines
Mon 23/211:46
STL
-
SYD
2 stops28h 14m
American Airlines
Deal found 17/1$1,723
Tue 3/311:20
SYD
-
STL
2 stops45h 09m
Multiple Airlines
Mon 13/414:40
STL
-
SYD
2 stops25h 40m
Multiple Airlines
Deal found 17/1$1,725
Tue 3/311:20
SYD
-
STL
1 stop29h 39m
American Airlines
Mon 13/406:20
STL
-
SYD
1 stop33h 45m
American Airlines
Deal found 19/1$1,728

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 21 January 2026.

Round-trip from

$1,254

One-way from

$842

Popular in

December

Cheapest in

August

Average price

$1,958
American Airlines
  • American Airlines
  • 5/2-9/2
  • 3 total stops
  • 44h 56m total
  • Australia to St. Louis
Search Deals
20/2
  • 20/2
  • 3 total stops
  • 42h 01m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($197 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($84 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 21 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

Thu 5/2

09:40-14:47

1 stop21h 07m

Lambert-St Louis

Mon 9/2

07:04-05:00

1 stop29h 56m

$1,254

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 5/3

11:40-20:41

2 stops25h 01m

Lambert-St Louis

Thu 12/3

05:00-06:30

2 stops34h 30m

$1,271

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 5/2

11:40-15:37

1 stop19h 57m

Lambert-St Louis

Mon 9/2

06:45-07:30

1 stop32h 45m

$1,271

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 5/3

13:00-22:25

1 stop26h 25m

Lambert-St Louis

Thu 12/3

06:00-08:30

2 stops34h 30m

$1,312

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 4/3

13:00-16:44

1 stop20h 44m

Lambert-St Louis

Wed 11/3

13:14-08:30

2 stops27h 16m

$1,312

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 27/3

10:30-16:59

2 stops22h 29m

Lambert-St Louis

Sun 5/4

11:15-08:15

2 stops30h 00m

$1,312

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/3

13:00-23:34

2 stops27h 34m

Lambert-St Louis

Fri 13/3

06:00-09:00

2 stops35h 00m

$1,315

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 27/3

10:30-16:59

2 stops22h 29m

Lambert-St Louis

Sat 4/4

08:30-09:15

1 stop32h 45m

$1,315

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 27/3

09:10-00:21

2 stops31h 11m

Lambert-St Louis

Sun 5/4

18:59-07:50

2 stops45h 51m

$1,322

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 17/2

11:20-15:29

2 stops45h 09m

Lambert-St Louis

Tue 24/2

08:41-09:35

2 stops31h 54m

$1,606

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 27 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 $1,105). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,646). 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 21 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
973 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.2

Comfort

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Qantas Airways
7.5
Good
973 reviews
Qantas Airways
7.5
Good
973 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.2

Comfort

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
United Airlines
7.4
Good
9,188 reviews
Qantas Airways
7.5
Good
973 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.2

Comfort

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Air Canada
7.1
Good
10,644 reviews
Qantas Airways
7.5
Good
973 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.2

Comfort

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

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 21h 07m. Your travel time can differ by up to 24h 02m. 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 $1,105). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,646). 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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,087Average$1,714FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,215Average$1,750FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,442Average$2,135FlexibilityNo 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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