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Cheap flights from Australia to St. Louis from $839

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
17 Jul — 24 Jul1
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 17 June 2026.

Fri 28/809:10
SYD
-
STL
2 stops47h 27m
American Airlines
Mon 7/905:42
STL
-
SYD
1 stop34h 13m
American Airlines
Deal found 14/6$1,391
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
American Airlines
Tue 8/906:36
STL
-
SYD
2 stops33h 29m
American Airlines
Deal found 12/6$1,414
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
American Airlines
Mon 7/915:32
STL
-
SYD
2 stops24h 33m
American Airlines
Deal found 14/6$1,415
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
American Airlines
Sun 6/918:45
STL
-
SYD
1 stop21h 10m
American Airlines
Deal found 12/6$1,425
Wed 26/817:50
SYD
-
STL
1 stop20h 09m
American Airlines
Wed 2/917:11
STL
-
SYD
2 stops22h 54m
American Airlines
Deal found 14/6$1,426
Thu 27/817:50
SYD
-
STL
1 stop20h 09m
American Airlines
Tue 8/908:36
STL
-
SYD
1 stop31h 19m
American Airlines
Deal found 14/6$1,436
Wed 26/810:20
SYD
-
STL
1 stop23h 19m
United Airlines
Mon 7/912:59
STL
-
SYD
2 stops27h 01m
United Airlines
Deal found 14/6$1,440
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
Qantas Airways
Wed 9/906:30
STL
-
SYD
1 stop33h 35m
Qantas Airways
Deal found 12/6$1,479
Sat 29/812:00
SYD
-
STL
1 stop19h 14m
Qantas Airways
Mon 7/915:32
STL
-
SYD
1 stop24h 23m
Qantas Airways
Deal found 14/6$1,480
Tue 25/809:10
SYD
-
STL
1 stop28h 49m
Qantas Airways
Mon 7/906:00
STL
-
SYD
1 stop34h 30m
Qantas Airways
Deal found 14/6$1,481
Wed 26/809:10
SYD
-
STL
1 stop28h 49m
American Airlines
Thu 3/906:00
STL
-
SYD
1 stop34h 05m
American Airlines
Deal found 12/6$1,483
Wed 5/809:45
MEL
-
STL
2 stops46h 52m
American Airlines
Sun 9/818:45
STL
-
MEL
1 stop43h 15m
American Airlines
Deal found 16/6$1,698

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 17 June 2026.

Round-trip from

$1,391

One-way from

$839

Popular in

July

Cheapest in

September

Average price

$2,202
American Airlines
  • American Airlines
  • 28/8-7/9
  • 3 total stops
  • 81h 40m total
  • Australia to St. Louis
Search Deals
Delta
  • Delta
  • 26/8
  • 2 total stops
  • 24h 40m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($274 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($80 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 17 June 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 30/7

09:20-18:42

2 stops48h 22m

Lambert-St Louis

Mon 3/8

12:10-07:20

2 stops52h 10m

$1,510

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/8

09:15-16:44

2 stops22h 29m

Lambert-St Louis

Thu 3/9

15:50-06:50

2 stops24h 00m

$1,555

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 1/8

09:30-19:23

2 stops24h 53m

Lambert-St Louis

Sat 8/8

13:38-06:55

2 stops26h 17m

$1,583

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 29/8

09:15-23:31

2 stops29h 16m

Lambert-St Louis

Thu 3/9

12:52-06:50

2 stops26h 58m

$1,670

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 16/7

17:50-23:59

1 stop21h 09m

Lambert-St Louis

Wed 22/7

06:37-07:30

1 stop33h 53m

$1,685

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Mon 3/8

19:23-06:55

1 stop20h 32m

$1,699

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/8

09:30-17:42

2 stops23h 12m

Lambert-St Louis

Mon 10/8

16:48-06:55

2 stops23h 07m

$1,708

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 5/8

06:00-14:02

3 stops47h 02m

Lambert-St Louis

Sun 9/8

08:55-11:35

3 stops35h 40m

$1,722

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 12/11

13:10-13:47

2 stops40h 37m

Lambert-St Louis

Mon 16/11

13:20-06:30

1 stop25h 10m

$1,743

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 1/9

09:30-20:46

2 stops26h 16m

Lambert-St Louis

Sat 5/9

16:40-07:00

2 stops23h 20m

$1,760

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 33 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, April is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,000). Flying from Australia to St. Louis in July is currently the most expensive (average of $1,347). 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 17 June 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
1,047 reviews
Check prices

Boarding

7.7

Overall

7.5

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
1,047 reviews
Qantas Airways
7.5
Good
1,047 reviews
Check prices

Boarding

7.7

Overall

7.5

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
9,846 reviews
Qantas Airways
7.5
Good
1,047 reviews
Check prices

Boarding

7.7

Overall

7.5

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
11,671 reviews
Qantas Airways
7.5
Good
1,047 reviews
Check prices

Boarding

7.7

Overall

7.5

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
11,200 reviews
Qantas Airways
7.5
Good
1,047 reviews
Check prices

Boarding

7.7

Overall

7.5

Food

7.0

Comfort

7.5

Crew

8.1

Entertainment

7.2

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?

    Air Canada, Delta, and United Airlines can get you from Australia to St. Louis in just under 22h 29m. Your travel time can differ by up to 25h 53m. 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, April is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,000). Flying from Australia to St. Louis in July is currently the most expensive (average of $1,347). 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 17 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,036Average$1,501FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,041Average$1,591FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,102Average$2,028FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,631Average$1,775FlexibilityNo 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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