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Cheap flights from Australia to St. Louis from $883

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
19 Jun — 26 Jun1
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 20 May 2026.

Mon 18/509:10
SYD
-
STL
1 stop29h 49m
Qantas Airways
Mon 25/506:35
STL
-
SYD
1 stop33h 30m
Qantas Airways
Deal found 16/5$1,424
Mon 18/509:10
SYD
-
STL
2 stops25h 20m
American Airlines
Mon 25/509:41
STL
-
SYD
2 stops30h 24m
American Airlines
Deal found 16/5$1,431
Wed 17/610:20
SYD
-
STL
1 stop22h 57m
United Airlines
Wed 24/613:13
STL
-
SYD
2 stops26h 47m
United Airlines
Deal found 17/5$1,448
Thu 11/609:20
SYD
-
STL
2 stops22h 13m
Air Canada
Wed 17/616:48
STL
-
SYD
2 stops23h 32m
Air Canada
Deal found 16/5$1,455
Mon 18/510:20
SYD
-
STL
1 stop23h 02m
United Airlines
Mon 25/510:25
STL
-
SYD
2 stops29h 35m
United Airlines
Deal found 16/5$1,458
Wed 3/609:10
SYD
-
STL
2 stops43h 42m
American Airlines
Sun 7/607:04
STL
-
SYD
1 stop32h 51m
American Airlines
Deal found 17/5$1,468
Wed 20/512:00
SYD
-
STL
1 stop20h 21m
American Airlines
Thu 28/506:35
STL
-
SYD
1 stop33h 30m
American Airlines
Deal found 19/5$1,482
Wed 12/812:00
SYD
-
STL
1 stop19h 41m
Qantas Airways
Sat 5/917:11
STL
-
SYD
1 stop22h 44m
Qantas Airways
Deal found 16/5$1,487
Mon 7/909:45
MEL
-
STL
2 stops38h 39m
American Airlines
Sun 27/918:51
STL
-
MEL
1 stop43h 09m
American Airlines
Deal found 17/5$1,784
Mon 7/910:55
MEL
-
STL
1 stop22h 44m
United Airlines
Sun 27/907:00
STL
-
MEL
1 stop34h 15m
United Airlines
Deal found 17/5$1,799
Mon 1/613:20
BNE
-
STL
2 stops25h 36m
Multiple Airlines
Mon 22/606:35
STL
-
BNE
1 stop31h 25m
Multiple Airlines
Deal found 18/5$1,843
Wed 3/620:30
MEL
-
STL
3 stops38h 39m
Air Canada
Sun 7/608:40
STL
-
MEL
3 stops35h 55m
Air Canada
Deal found 19/5$1,918

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 20 May 2026.

Round-trip from

$1,448

One-way from

$883

Popular in

July

Cheapest in

September

Average price

$1,616
United Airlines
  • United Airlines
  • 17/6-24/6
  • 4 total stops
  • 56h 35m total
  • Australia to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 25/5
  • 2 total stops
  • 29h 34m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($282 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($85 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 20 May 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

Wed 12/8

10:20-18:39

1 stop23h 19m

Lambert-St Louis

Sat 5/9

15:13-07:00

2 stops24h 47m

$1,518
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 12/6

09:30-16:33

2 stops22h 03m

Lambert-St Louis

Sun 5/7

19:23-06:55

1 stop20h 32m

$1,518

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 11/6

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 17/6

13:05-07:20

3 stops51h 15m

$1,565

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/6

09:20-21:10

2 stops26h 50m

Lambert-St Louis

Sun 7/6

08:40-07:20

2 stops31h 40m

$1,697

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/9

10:55-18:39

1 stop22h 44m

Lambert-St Louis

Sun 27/9

07:00-08:15

1 stop34h 15m

$1,799

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 20/7

19:23-06:55

1 stop20h 32m

$1,854

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 19/9

09:15-23:37

2 stops29h 22m

Lambert-St Louis

Sun 27/9

14:15-06:50

2 stops25h 35m

$1,858

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 3/6

20:30-20:09

3 stops38h 39m

Lambert-St Louis

Sun 7/6

08:40-11:35

3 stops35h 55m

$1,918

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 1/6

14:00-16:33

2 stops41h 33m

Lambert-St Louis

Mon 22/6

06:35-05:00

1 stop31h 25m

$2,076

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 14/6

21:00-23:56

2 stops41h 56m

Lambert-St Louis

Sat 20/6

06:35-06:45

1 stop33h 10m

$2,337

Flights are sorted by cheapest return flights first.

Deals found on 20/5

Showing 1-10 of 32 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, May is the cheapest month in which you can book a flight from Australia to St. Louis (average of $749). Flying from Australia to St. Louis in August is currently the most expensive (average of $1,236). 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 20 May 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
1,037 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Comfort

7.4

Overall

7.5

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
1,037 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Comfort

7.4

Overall

7.5

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
9,736 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Comfort

7.4

Overall

7.5

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
11,641 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Comfort

7.4

Overall

7.5

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
11,065 reviews
Qantas Airways
7.5
Good
1,037 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.2

Food

7.0

Comfort

7.4

Overall

7.5

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, Air Canada, and Qantas Airways can get you from Australia to St. Louis in just under 23h 19m. Your travel time can differ by up to 26h 46m. 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 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, May is the cheapest month in which you can book a flight from Australia to St. Louis (average of $749). Flying from Australia to St. Louis in August is currently the most expensive (average of $1,236). 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 20 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,028Average$1,489FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,033Average$1,505FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,094Average$1,937FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,619Average$1,762FlexibilityNo 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.

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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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