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Cheap flights from Australia to St. Louis from $884

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
21 Dec — 28 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 21 November 2025.

Round-trip from

$1,225

One-way from

$884

Popular in

May

Cheapest in

November

Average price

$1,593
Air Canada
  • Air Canada
  • 13/2-17/2
  • 4 total stops
  • 76h 48m total
  • Australia to St. Louis
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Delta
  • Delta
  • 12/12
  • 2 total stops
  • 41h 14m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($125 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($65 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 21 November 2025.

Thu 4/1211:20SYD - STL
2 stops45h 09mAir Canada
Mon 8/1216:05STL - SYD
2 stops48h 30mAir Canada
Deal found 19/11$1,777
Wed 10/1213:00SYD - STL
2 stops27h 57mQantas Airways
Sat 3/115:30STL - SYD
2 stops29h 55mQantas Airways
Deal found 19/11$1,796
Fri 21/1121:55SYD - STL
2 stops34h 34mQantas Airways
Thu 27/1107:00STL - SYD
2 stops36h 15mQantas Airways
Deal found 20/11$1,896
Wed 10/1215:35SYD - STL
2 stops25h 22mQantas Airways
Fri 2/118:44STL - SYD
2 stops23h 11mQantas Airways
Deal found 19/11$1,976
Thu 4/1217:30SYD - STL
2 stops23h 27mQantas Airways
Mon 8/1206:55STL - SYD
1 stop33h 05mQantas Airways
Deal found 18/11$2,309
Thu 4/1211:20SYD - STL
2 stops38h 30mAmerican Airlines
Mon 8/1217:30STL - SYD
1 stop20h 25mAmerican Airlines
Deal found 19/11$2,336
Thu 4/1210:40SYD - STL
2 stops24h 16mDelta
Mon 8/1209:30STL - SYD
2 stops30h 00mDelta
Deal found 17/11$2,503
Thu 20/1106:30DPO - STL
2 stops34h 12mQantas Airways
Mon 24/1113:20STL - DPO
2 stops30h 50mQantas Airways
Deal found 18/11$3,880

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 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

Fri 13/2

10:45-15:29

2 stops44h 44m

Lambert-St Louis

Tue 17/2

08:41-08:45

2 stops32h 04m

$1,225

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

10:45-14:29

2 stops43h 44m

Lambert-St Louis

Tue 10/3

16:30-07:45

2 stops24h 15m

$1,227

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 13/2

19:40-09:33

2 stops29h 53m

Lambert-St Louis

Tue 17/2

06:30-05:00

1 stop30h 30m

$1,261

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Sun 8/3

19:40-23:09

1 stop18h 29m

Lambert-St Louis

Tue 10/3

12:01-05:00

2 stops25h 59m

$1,262

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

$1,332

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 4/4

11:55-10:35

2 stops38h 40m

Lambert-St Louis

Tue 14/4

19:06-08:15

1 stop22h 09m

$1,425

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

11:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 8/12

16:05-09:35

2 stops48h 30m

$1,777

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 22/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Fri 27/3

16:05-08:20

2 stops48h 15m

$1,845

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 5/2

08:00-15:29

3 stops48h 29m

Lambert-St Louis

Mon 9/2

16:05-13:35

3 stops52h 30m

$1,854

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 5/2

06:00-14:47

2 stops25h 47m

Lambert-St Louis

Mon 9/2

11:55-13:35

2 stops32h 40m

$1,885

Flights are sorted by cheapest return flights first.

Deals found on 20/11

Showing 1-10 of 34 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 $1,151). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,703). 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 21 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 21 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
942 reviews
Check prices

Food

7.0

Boarding

7.7

Overall

7.5

Comfort

7.5

Crew

8.2

Entertainment

7.2

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
942 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Boarding

7.7

Overall

7.5

Comfort

7.5

Crew

8.2

Entertainment

7.2

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
9,028 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Boarding

7.7

Overall

7.5

Comfort

7.5

Crew

8.2

Entertainment

7.2

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
10,462 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Boarding

7.7

Overall

7.5

Comfort

7.5

Crew

8.2

Entertainment

7.2

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?

    Air Canada, American Airlines, and United Airlines can get you from Australia to St. Louis in just under 29h 53m. Your travel time can differ by up to 14h 51m. 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 Delta, with whom users have recently found tickets for as low as $884. However, be on the lookout for offers from American Airlines and Qantas Airways, 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 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 $1,151). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,703). 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 21 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,172Average$1,802FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,264Average$2,160FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,529Average$2,297FlexibilityNo 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?

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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.

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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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