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Cheap flights from Australia to St. Louis from $917

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
13 Feb — 20 Feb1
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 14 January 2026.

Round-trip from

$1,199

One-way from

$917

Popular in

December

Cheapest in

August

Average price

$1,968
Air Canada
  • Air Canada
  • 2/2-21/2
  • 4 total stops
  • 69h 24m total
  • Australia to St. Louis
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Air New Zealand
  • Air New Zealand
  • 17/4
  • 2 total stops
  • 27h 32m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($199 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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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 14 January 2026.

Mon 2/210:45
BNE
-
STL
2 stops44h 44m
Air Canada
Sat 21/216:05
STL
-
BNE
2 stops24h 40m
Air Canada
Deal found 13/1$1,199
Fri 13/210:45
BNE
-
STL
2 stops44h 44m
Air Canada
Sun 22/216:05
STL
-
BNE
2 stops24h 40m
Air Canada
Deal found 13/1$1,208
Thu 5/209:40
BNE
-
STL
1 stop22h 34m
American Airlines
Mon 9/208:31
STL
-
BNE
2 stops28h 29m
American Airlines
Deal found 11/1$1,257
Mon 2/209:40
BNE
-
STL
1 stop22h 34m
American Airlines
Sat 21/218:18
STL
-
BNE
1 stop20h 12m
American Airlines
Deal found 13/1$1,262
Fri 27/211:40
BNE
-
STL
2 stops27h 19m
United Airlines
Fri 6/307:41
STL
-
BNE
2 stops31h 49m
United Airlines
Deal found 12/1$1,279
Fri 13/206:10
BNE
-
STL
3 stops49h 19m
Multiple Airlines
Sun 22/216:05
STL
-
BNE
2 stops48h 40m
Multiple Airlines
Deal found 13/1$1,288
Thu 26/213:00
MEL
-
STL
1 stop20h 44m
United Airlines
Thu 5/306:51
STL
-
MEL
1 stop34h 09m
United Airlines
Deal found 12/1$1,318
Sat 28/211:30
MEL
-
STL
2 stops26h 35m
United Airlines
Sat 7/314:50
STL
-
MEL
2 stops25h 40m
United Airlines
Deal found 13/1$1,320
Sat 28/212:00
MEL
-
STL
1 stop28h 59m
American Airlines
Sat 7/307:00
STL
-
MEL
1 stop29h 00m
American Airlines
Deal found 13/1$1,369
Fri 27/206:35
BNE
-
STL
3 stops48h 54m
Air Canada
Fri 6/316:05
STL
-
BNE
2 stops24h 40m
Air Canada
Deal found 12/1$1,435
Wed 18/210:35
MEL
-
STL
2 stops28h 39m
Air New Zealand
Mon 23/206:00
STL
-
MEL
2 stops35h 55m
Air New Zealand
Deal found 13/1$1,520
Tue 3/311:20
SYD
-
STL
2 stops45h 09m
Multiple Airlines
Mon 13/414:40
STL
-
SYD
2 stops25h 40m
Multiple Airlines
Deal found 11/1$1,644

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 14 January 2026.
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

Sun 22/2

16:05-08:45

2 stops24h 40m

$1,208

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 2/2

14:05-15:15

3 stops65h 10m

Lambert-St Louis

Sat 21/2

16:05-08:45

2 stops48h 40m

$1,239

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Thu 5/2

19:40-23:59

1 stop20h 19m

Lambert-St Louis

Mon 9/2

11:55-06:30

1 stop26h 35m

$1,257

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Fri 13/2

09:40-19:29

1 stop25h 49m

Lambert-St Louis

Sun 22/2

14:19-06:30

2 stops24h 11m

$1,262

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Mon 2/2

09:40-16:14

1 stop22h 34m

Lambert-St Louis

Sat 21/2

18:18-06:30

1 stop20h 12m

$1,262

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 26/2

11:30-21:40

2 stops27h 10m

Lambert-St Louis

Thu 5/3

14:50-10:00

2 stops26h 10m

$1,318

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/2

11:30-21:05

2 stops26h 35m

Lambert-St Louis

Sat 7/3

14:50-09:30

2 stops25h 40m

$1,320

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/2

12:00-23:59

1 stop28h 59m

Lambert-St Louis

Sat 7/3

07:00-05:00

1 stop29h 00m

$1,369

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 18/2

10:35-22:14

2 stops28h 39m

Lambert-St Louis

Mon 23/2

06:00-10:55

2 stops35h 55m

$1,520

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 3/3

11:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 13/4

14:40-07:20

2 stops25h 40m

$1,644

Flights are sorted by cheapest return flights first.

Deals found on 12/1

Showing 1-10 of 32 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 $1,111). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,654). 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 14 January 2026.
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
971 reviews
Check prices

Entertainment

7.2

Crew

8.2

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Qantas Airways
7.5
Good
971 reviews
Qantas Airways
7.5
Good
971 reviews
Check prices

Entertainment

7.2

Crew

8.2

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
United Airlines
7.4
Good
9,157 reviews
Qantas Airways
7.5
Good
971 reviews
Check prices

Entertainment

7.2

Crew

8.2

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Air Canada
7.1
Good
10,620 reviews
Qantas Airways
7.5
Good
971 reviews
Check prices

Entertainment

7.2

Crew

8.2

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

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 20h 19m. Your travel time can differ by up to 24h 25m. 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 most popular routes from Australia to St. Louis?

    Most travellers choose Melbourne - Lambert-St Louis, Sydney Kingsford Smith - 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 $1,111). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,654). 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 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 14 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,093Average$1,691FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,222Average$1,768FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,450Average$2,166FlexibilityNo cancel feeOn-time74%
Search Qantas Airways 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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