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Cheap flights from Australia to St. Louis from $902

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 November 2025.

Round-trip from

$1,259

One-way from

$902

Popular in

December

Cheapest in

November

Average price

$1,587
American Airlines
  • American Airlines
  • 8/3-10/3
  • 4 total stops
  • 71h 39m total
  • Australia to St. Louis
Search Deals
United Airlines
  • United Airlines
  • 12/12
  • 1 total stop
  • 20h 27m total
  • Australia to St. Louis
Search Deals
High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($63 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find 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 November 2025.

Sat 6/1216:00SYD - STL
2 stops40h 29mAir Canada
Wed 7/116:05STL - SYD
2 stops45h 50mAir Canada
Deal found 5/11$1,728
Sat 6/1211:50SYD - STL
1 stop21h 14mUnited Airlines
Wed 7/108:45STL - SYD
2 stops31h 20mUnited Airlines
Deal found 5/11$2,451
Sat 6/1216:15SYD - STL
2 stops24h 42mMultiple Airlines
Wed 7/115:20STL - SYD
3 stops28h 10mMultiple Airlines
Deal found 5/11$2,584
Sat 6/1217:45SYD - STL
1 stop23h 12mQantas Airways
Wed 7/117:04STL - SYD
1 stop20h 51mQantas Airways
Deal found 5/11$2,642
Thu 20/1111:00LST - STL
2 stops49h 30mQantas Airways
Mon 24/1113:20STL - LST
2 stops37h 40mQantas Airways
Deal found 5/11$2,808
Thu 20/1106:30DPO - STL
2 stops34h 12mQantas Airways
Mon 24/1113:20STL - DPO
2 stops34h 15mQantas Airways
Deal found 5/11$3,155
Sun 21/1211:50SYD - STL
1 stop21h 46mUnited Airlines
Sun 28/1218:35STL - SYD
2 stops43h 25mUnited Airlines
Deal found 5/11$3,481
Sun 21/1217:45SYD - STL
1 stop23h 06mQantas Airways
Sun 28/1211:41STL - SYD
1 stop26h 14mQantas Airways
Deal found 5/11$3,502
Sun 21/1207:25SYD - STL
3 stops28h 57mMultiple Airlines
Sun 28/1211:41STL - SYD
2 stops27h 19mMultiple Airlines
Deal found 5/11$3,884

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 November 2025.
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

19:40-08:48

2 stops28h 08m

Lambert-St Louis

Tue 10/3

18:29-05:00

2 stops43h 31m

$1,259

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:40-23:37

2 stops28h 57m

Lambert-St Louis

Tue 10/3

18:59-07:20

2 stops45h 21m

$1,276

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

09:40-15:09

1 stop21h 29m

Lambert-St Louis

Tue 10/3

17:59-05:30

1 stop20h 31m

$1,326

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:45-14:29

2 stops43h 44m

Lambert-St Louis

Tue 10/3

17:54-07:45

2 stops46h 51m

$1,396

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,417

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/3

16:05-22:57

1 stop23h 52m

Lambert-St Louis

Tue 10/3

18:29-09:30

2 stops47h 01m

$1,633

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/3

10:10-17:48

2 stops24h 38m

Lambert-St Louis

Tue 10/3

18:59-07:00

2 stops44h 01m

$1,710

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

16:00-15:29

2 stops40h 29m

Lambert-St Louis

Wed 7/1

16:05-06:55

2 stops45h 50m

$1,728

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

06:30-14:02

2 stops23h 32m

Lambert-St Louis

Mon 16/3

06:30-09:00

1 stop34h 30m

$2,187

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sat 7/3

00:30-21:24

2 stops36h 54m

Lambert-St Louis

Tue 10/3

11:18-10:30

2 stops32h 12m

$2,230

Flights are sorted by cheapest return flights first.

Deals found on 7/11

Showing 1-10 of 30 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, December is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,133). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,696). 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.

What is the cheapest time of day to fly from AU to STL?

Find hourly flight availability from Australia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

One of the essential ways to save on airfare from Australia to St. Louis is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 9% on airfare.

What is the cheapest day to fly from Australia to St. Louis?

Use this chart to determine the cheapest time to fly return from Australia to St. Louis. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Australia to St. Louis flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 2025.
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
929 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Qantas Airways
7.5
Good
929 reviews
Qantas Airways
7.5
Good
929 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
United Airlines
7.4
Good
9,007 reviews
Qantas Airways
7.5
Good
929 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Air Canada
7.1
Good
10,416 reviews
Qantas Airways
7.5
Good
929 reviews
Check prices

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

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, Delta, and Qantas Airways can get you from Australia to St. Louis in just under 21h 29m. Your travel time can differ by up to 7h 28m. 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 cheapest airlines to fly from Australia to St. Louis one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $902. However, be on the lookout for offers from Delta and Air New Zealand, as they are both options that can get you from Australia to St. Louis for a low price.

  • 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 Devonport - 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, December is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,133). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,696). 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,167Average$1,795FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,259Average$2,151FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,523Average$2,288FlexibilityNo 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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