St. Louis

$1,098+ Cheap flights from Australia to St. Louis (STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
May 15 — May 221
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Cheap flight deals from Australia to St. Louis

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 April 15, 2026.

This Air Canada deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 am
MEL
-
STL
3 stops45h 06m
Air Canada
Tue 6/22:15 pm
STL
-
MEL
3 stops30h 20m
Air Canada
Deal found 4/13$1,098
This BYOjet deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:00 am
MEL
-
STL
3 stops29h 09m
Air Canada
Fri 5/227:05 am
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 4/12$1,129
This Gotogate deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:30 pm
MEL
-
STL
3 stops54h 36m
Air Canada
Tue 5/197:05 am
STL
-
MEL
3 stops37h 30m
Air Canada
Deal found 4/14$1,133
This American Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:45 am
MEL
-
STL
1 stop29h 14m
American Airlines
Tue 5/1912:27 pm
STL
-
MEL
2 stops27h 18m
American Airlines
Deal found 4/14$1,144
This American Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:45 am
MEL
-
STL
1 stop29h 14m
American Airlines
Sun 5/176:21 am
STL
-
MEL
1 stop33h 24m
American Airlines
Deal found 4/12$1,145
This United Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:55 am
MEL
-
STL
2 stops24h 48m
United Airlines
Fri 5/221:13 pm
STL
-
MEL
2 stops27h 17m
United Airlines
Deal found 4/12$1,156
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1010:00 am
MEL
-
STL
2 stops24h 03m
Delta
Sun 5/173:11 pm
STL
-
MEL
2 stops49h 39m
Delta
Deal found 4/12$1,164
This TravelUp deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1210:55 am
MEL
-
STL
2 stops25h 18m
Multiple Airlines
Tue 5/1910:25 am
STL
-
MEL
2 stops30h 50m
Multiple Airlines
Deal found 4/14$1,169
This Air Canada deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:20 am
SYD
-
STL
2 stops26h 05m
Air Canada
Wed 6/31:05 pm
STL
-
SYD
2 stops51h 15m
Air Canada
Deal found 4/12$1,209
This Air Canada deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
-
STL
2 stops41h 46m
Multiple Airlines
Thu 5/284:48 pm
STL
-
SYD
2 stops23h 32m
Multiple Airlines
Deal found 4/11$1,211
This Trip.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:45 am
MEL
-
STL
1 stop29h 14m
Qantas Airways
Tue 5/196:21 am
STL
-
MEL
1 stop33h 24m
Qantas Airways
Deal found 4/14$1,214
This Jettzy deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SYD
-
STL
2 stops26h 23m
Air Canada
Thu 6/114:48 pm
STL
-
SYD
2 stops23h 32m
Air Canada
Deal found 4/13$1,245

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 April 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,098
(Air Canada)

Popular in

July

Cheapest in

September

Average price

$1,640
Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.
From Australia to Lambert-St Louis
Highest demand for flights based on searches. 7% potential increase in price ($112 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
Average for round-trip flights in April 2026

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated April 15, 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 round-trip

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 5/29

6:00 am-12:06 pm

3 stops45h 06m

Lambert-St Louis

Tue 6/2

8:40 am-11:05 am

3 stops35h 25m

$1,098

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 5/15

10:55 am-8:43 pm

2 stops24h 48m

Lambert-St Louis

Fri 5/22

7:23 pm-8:15 am

1 stop21h 52m

$1,156

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 5/10

10:00 am-7:03 pm

2 stops24h 03m

Lambert-St Louis

Sun 5/17

3:11 pm-7:50 am

2 stops49h 39m

$1,164

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/27

9:20 am-8:25 pm

3 stops50h 05m

Lambert-St Louis

Wed 6/3

1:05 pm-7:20 am

2 stops51h 15m

$1,217

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Thu 5/28

4:48 pm-7:20 am

2 stops23h 32m

$1,257

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

9:20 am-8:25 pm

2 stops26h 05m

Lambert-St Louis

Thu 5/28

1:05 pm-7:20 am

3 stops51h 15m

$1,265

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/7

9:20 am-12:06 pm

2 stops41h 46m

Lambert-St Louis

Mon 5/11

5:59 pm-7:20 am

2 stops46h 21m

$1,316

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/13

10:20 am-6:24 pm

1 stop23h 04m

Lambert-St Louis

Sun 9/6

1:18 pm-7:00 am

2 stops26h 42m

$1,480

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/5

10:20 am-6:17 pm

1 stop22h 57m

Lambert-St Louis

Sat 8/29

1:18 pm-6:55 am

2 stops26h 37m

$1,531

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/20

10:20 am-6:22 pm

1 stop23h 02m

Lambert-St Louis

Thu 5/28

7:23 pm-6:55 am

1 stop20h 32m

$1,532

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

Showing 1-10 of 21 resultsSorted by cheapest first
1
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3

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 round-trip 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 $649). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,141). 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 April 15, 2026.
Peruse reviews from past customers who have flown with United Airlines from Australia to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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?

    For a flight from Australia to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

  • How long is the flight from Australia to St. Louis?

    A quick flight from Australia to St. Louis can take about 23h 04m. Air Canada provides one of the quickest options available for as low as $1,480. The distance from Australia to St. Louis is about 9054 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes 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 vacation 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 $649). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,141). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Australia to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Australia to St. Louis

Discover the top airline 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 2,558,603 searches. Data last updated April 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,483FlexibilityNo cancel feeOn-time69%

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