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Cheap flights from Australia to St. Louis from $866

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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
18 Aug — 25 Aug1
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 19 July 2026.

Wed 7/1013:00
SYD
-
STL
1 stop21h 20m
American Airlines
Wed 11/1107:00
STL
-
SYD
1 stop33h 00m
American Airlines
Deal found 18/7$1,422
Thu 3/913:15
SYD
-
STL
3 stops43h 35m
Multiple Airlines
Thu 10/910:35
STL
-
SYD
3 stops34h 15m
Multiple Airlines
Deal found 17/7$1,446
Mon 12/1010:10
SYD
-
STL
1 stop29h 36m
American Airlines
Thu 5/1115:59
STL
-
SYD
1 stop21h 56m
American Airlines
Deal found 14/7$1,462
Tue 25/817:50
SYD
-
STL
1 stop20h 09m
Qantas Airways
Thu 10/906:00
STL
-
SYD
1 stop34h 05m
Qantas Airways
Deal found 15/7$1,473
Fri 14/812:00
SYD
-
STL
1 stop21h 05m
American Airlines
Fri 21/806:00
STL
-
SYD
1 stop34h 05m
American Airlines
Deal found 17/7$1,480
Tue 25/812:00
SYD
-
STL
1 stop19h 41m
American Airlines
Thu 10/906:00
STL
-
SYD
2 stops36h 10m
American Airlines
Deal found 15/7$1,500
Tue 25/809:30
SYD
-
STL
2 stops22h 04m
United Airlines
Thu 10/912:59
STL
-
SYD
2 stops27h 01m
United Airlines
Deal found 15/7$1,509
Fri 14/809:10
SYD
-
STL
1 stop28h 49m
Qantas Airways
Fri 21/806:00
STL
-
SYD
1 stop34h 05m
Qantas Airways
Deal found 14/7$1,533
Thu 10/909:10
SYD
-
STL
2 stops27h 38m
American Airlines
Sun 13/914:30
STL
-
SYD
2 stops25h 35m
American Airlines
Deal found 14/7$1,543
Wed 4/1109:40
BNE
-
STL
1 stop23h 00m
American Airlines
Sun 8/1115:59
STL
-
BNE
1 stop22h 31m
American Airlines
Deal found 14/7$1,595
Sun 25/1011:00
MEL
-
STL
2 stops26h 16m
Delta
Sun 1/1110:45
STL
-
MEL
2 stops30h 05m
Delta
Deal found 19/7$1,599
Sun 25/1012:00
MEL
-
STL
1 stop22h 20m
Qantas Airways
Sun 1/1113:20
STL
-
MEL
1 stop22h 40m
Qantas Airways
Deal found 19/7$1,625

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 19 July 2026.

Round-trip from

$1,422

One-way from

$866

Popular in

April

Cheapest in

September

Average price

$1,518
American Airlines
  • American Airlines
  • 7/10-11/11
  • 2 total stops
  • 54h 20m total
  • Australia to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 30/7
  • 2 total stops
  • 24h 22m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($396 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($69 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 19 July 2026.
Use the filters below to find and compare flights from Australia to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/9

13:15-17:50

3 stops43h 35m

Lambert-St Louis

Thu 10/9

10:35-11:50

3 stops34h 15m

$1,446

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/8

09:30-16:34

2 stops22h 04m

Lambert-St Louis

Thu 10/9

12:59-07:00

2 stops27h 01m

$1,509

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 14/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Fri 21/8

15:32-07:05

2 stops24h 33m

$1,548

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

09:10-23:30

1 stop29h 20m

Lambert-St Louis

Sun 13/9

12:46-07:05

2 stops27h 19m

$1,552

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 4/11

09:40-16:40

1 stop23h 00m

Lambert-St Louis

Sun 8/11

11:31-06:30

2 stops26h 59m

$1,595

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 29/8

10:16-07:05

2 stops29h 49m

$1,598

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/10

10:30-16:37

2 stops22h 07m

Lambert-St Louis

Thu 5/11

11:00-09:20

2 stops29h 20m

$1,614

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/9

09:30-20:46

2 stops26h 16m

Lambert-St Louis

Thu 10/9

13:36-07:00

2 stops26h 24m

$1,628

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 29/8

06:00-07:05

1 stop34h 05m

$1,664

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/8

06:00-20:24

3 stops29h 24m

Lambert-St Louis

Mon 10/8

14:40-11:35

3 stops29h 55m

$1,715

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 31 resultsSorted by cheapest first
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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, June is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,174). Flying from Australia to St. Louis in April is currently the most expensive (average of $2,185). 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 19 July 2026.
Read reviews from past customers who have flown with Qantas Airways,United Airlines, andAmerican Airlines 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
1,062 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Comfort

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
Qantas Airways
7.5
Good
1,062 reviews
Qantas Airways
7.5
Good
1,062 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Comfort

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
United Airlines
7.4
Good
10,007 reviews
Qantas Airways
7.5
Good
1,062 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Comfort

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
American Airlines
7.1
Good
11,821 reviews
Qantas Airways
7.5
Good
1,062 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Comfort

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
Air Canada
7.1
Good
11,359 reviews
Qantas Airways
7.5
Good
1,062 reviews
Check prices

Entertainment

7.2

Food

7.0

Overall

7.5

Boarding

7.7

Comfort

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!

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?

    United Airlines, American Airlines, and Air Canada can get you from Australia to St. Louis in just under 22h 04m. Your travel time can differ by up to 7h 20m. Airlines will cover a distance of 14571 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 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, June is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,174). Flying from Australia to St. Louis in April is currently the most expensive (average of $2,185). 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 4 airlines flying from Australia to St. Louis

Discover the top 4 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 19 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,048Average$1,518FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,053Average$1,586FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,115Average$2,117FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,490Average$1,796FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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