Find flights
When to book
Airlines
FAQs

Cheap flights from Australia to St. Louis from $868

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 22/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
9 Mar — 16 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 7 February 2026.

Thu 5/210:45
BNE
-
STL
2 stops22h 10m
Air Canada
Mon 9/216:05
STL
-
BNE
2 stops48h 40m
Air Canada
Deal found 3/2$1,106
Thu 5/219:40
BNE
-
STL
1 stop20h 19m
American Airlines
Mon 9/207:45
STL
-
BNE
2 stops29h 15m
American Airlines
Deal found 4/2$1,109
Thu 14/509:20
SYD
-
STL
2 stops49h 44m
Air Canada
Thu 4/607:30
STL
-
SYD
2 stops32h 50m
Air Canada
Deal found 6/2$1,255
Sun 22/309:10
MEL
-
STL
2 stops31h 11m
Delta
Sun 29/314:12
STL
-
MEL
2 stops50h 38m
Delta
Deal found 5/2$1,274
Mon 23/309:40
SYD
-
STL
2 stops27h 26m
Delta
Mon 30/307:03
STL
-
SYD
2 stops32h 47m
Delta
Deal found 6/2$1,304
Sun 22/312:00
MEL
-
STL
1 stop27h 58m
American Airlines
Sun 29/314:31
STL
-
MEL
2 stops24h 14m
American Airlines
Deal found 5/2$1,351
Sat 21/316:05
MEL
-
STL
1 stop22h 53m
American Airlines
Sat 28/309:35
STL
-
MEL
1 stop27h 25m
American Airlines
Deal found 4/2$1,352
Wed 5/809:20
SYD
-
STL
2 stops49h 42m
Air Canada
Fri 28/814:40
STL
-
SYD
2 stops49h 40m
Air Canada
Deal found 7/2$1,355
Sat 28/316:05
MEL
-
STL
1 stop19h 37m
American Airlines
Sat 4/411:46
STL
-
MEL
1 stop26h 14m
American Airlines
Deal found 4/2$1,355
Sat 21/308:20
BNE
-
STL
2 stops22h 37m
Qantas Airways
Sat 28/306:38
STL
-
BNE
1 stop31h 22m
Qantas Airways
Deal found 3/2$1,366
Sat 28/316:05
MEL
-
STL
1 stop22h 53m
American Airlines
Sun 5/406:38
STL
-
MEL
1 stop33h 07m
American Airlines
Deal found 4/2$1,368
Sat 6/609:15
SYD
-
STL
2 stops38h 25m
Delta
Mon 29/606:30
STL
-
SYD
2 stops33h 20m
Delta
Deal found 7/2$1,381

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 7 February 2026.

Round-trip from

$1,255

One-way from

$868

Popular in

July

Cheapest in

August

Average price

$1,780
Air Canada
  • Air Canada
  • 14/5-4/6
  • 4 total stops
  • 82h 34m total
  • Australia to St. Louis
Search Deals
Qantas Airways
  • Qantas Airways
  • 22/2
  • 2 total stops
  • 36h 18m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($101 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($77 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 7 February 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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

09:20-20:04

2 stops49h 44m

Lambert-St Louis

Thu 4/6

07:30-07:20

2 stops32h 50m

$1,270

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 22/3

09:10-00:21

2 stops31h 11m

Lambert-St Louis

Sun 29/3

14:12-08:50

2 stops50h 38m

$1,274

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 23/3

09:40-21:06

2 stops27h 26m

Lambert-St Louis

Mon 30/3

07:03-07:50

2 stops32h 47m

$1,304

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 21/3

16:05-22:58

1 stop22h 53m

Lambert-St Louis

Sat 28/3

09:35-05:00

1 stop27h 25m

$1,352

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/8

09:20-20:02

2 stops49h 42m

Lambert-St Louis

Fri 28/8

14:40-07:20

2 stops49h 40m

$1,355

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

16:05-19:42

1 stop19h 37m

Lambert-St Louis

Sat 4/4

11:46-05:00

1 stop26h 14m

$1,355

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

16:05-19:42

1 stop19h 37m

Lambert-St Louis

Sun 5/4

14:31-06:45

2 stops25h 14m

$1,361

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sat 21/3

08:20-15:57

2 stops22h 37m

Lambert-St Louis

Sat 28/3

06:38-05:00

1 stop31h 22m

$1,366

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/6

09:15-08:40

2 stops38h 25m

Lambert-St Louis

Mon 29/6

06:30-06:50

2 stops33h 20m

$1,381

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-18:00

2 stops23h 40m

Lambert-St Louis

Mon 23/2

08:00-09:00

2 stops32h 00m

$1,492

Flights are sorted by cheapest return flights first.

Deals found on 6/2

Showing 1-10 of 22 results
1
2
3

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 $1,056). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,579). 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 7 February 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
988 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.1

Boarding

7.7

Overall

7.5

Food

7.0

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
988 reviews
Qantas Airways
7.5
Good
988 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.1

Boarding

7.7

Overall

7.5

Food

7.0

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
9,254 reviews
Qantas Airways
7.5
Good
988 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.1

Boarding

7.7

Overall

7.5

Food

7.0

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
10,697 reviews
Qantas Airways
7.5
Good
988 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.1

Boarding

7.7

Overall

7.5

Food

7.0

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, Delta, and American Airlines can get you from Australia to St. Louis in just under 22h 53m. Your travel time can differ by up to 26h 51m. 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 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 $1,056). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,579). 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 7 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,043Average$1,613FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,166Average$1,684FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,384Average$2,012FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.