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St. Louis

$567+ Cheap flights from Australia to St. Louis (STL)

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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
feb. 20 — feb. 271
vie. 2/20
vie. 2/27
1 adult, Economy
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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 enero 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/19. 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.
vie. 3/2710:30 am
MEL
-
STL
2 stops22h 29m
United Airlines
dom. 4/57:05 pm
STL
-
MEL
1 stop22h 10m
United Airlines
Deal found 1/19$883
This United Airlines deal was found by Cheapflights users on 1/20. 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.
vie. 3/2710:30 am
MEL
-
STL
2 stops22h 29m
United Airlines
sáb. 4/48:30 am
STL
-
MEL
1 stop32h 45m
United Airlines
Deal found 1/20$885
This Delta deal was found by Cheapflights users on 1/19. 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.
vie. 3/279:10 am
MEL
-
STL
2 stops31h 11m
Delta
dom. 4/56:59 pm
STL
-
MEL
2 stops45h 51m
Delta
Deal found 1/19$890
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/2710:30 am
MEL
-
STL
2 stops22h 29m
Air New Zealand
sáb. 4/47:05 pm
STL
-
MEL
1 stop22h 10m
Air New Zealand
Deal found 1/19$941
This Gotogate deal was found by Cheapflights users on 1/19. 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.
mar. 2/311:20 am
SYD
-
STL
2 stops44h 55m
Air Canada
mar. 2/178:41 am
STL
-
SYD
2 stops55h 54m
Air Canada
Deal found 1/19$1,144
This Air Canada deal was found by Cheapflights users on 1/20. 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.
jue. 7/169:20 am
SYD
-
STL
2 stops48h 07m
Air Canada
lun. 8/35:20 am
STL
-
SYD
2 stops35h 00m
Air Canada
Deal found 1/20$1,158
This American Airlines deal was found by Cheapflights users on 1/18. 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.
jue. 2/1911:20 am
SYD
-
STL
2 stops25h 09m
American Airlines
lun. 2/232:31 pm
STL
-
SYD
2 stops25h 29m
American Airlines
Deal found 1/18$1,160
This Air Canada deal was found by Cheapflights users on 1/20. 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.
jue. 7/169:20 am
SYD
-
STL
2 stops48h 07m
Air Canada
dom. 8/22:40 pm
STL
-
SYD
2 stops49h 40m
Air Canada
Deal found 1/20$1,162
This American Airlines deal was found by Cheapflights users on 1/19. 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.
mar. 3/311:20 am
SYD
-
STL
2 stops22h 53m
American Airlines
lun. 4/133:36 pm
STL
-
SYD
2 stops24h 29m
American Airlines
Deal found 1/19$1,163
This Air Canada deal was found by Cheapflights users on 1/20. 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.
jue. 7/169:20 am
SYD
-
STL
2 stops48h 07m
Air Canada
mar. 7/285:20 am
STL
-
SYD
2 stops35h 00m
Air Canada
Deal found 1/20$1,172
This Qantas Airways deal was found by Cheapflights users on 1/19. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/35:45 pm
SYD
-
STL
1 stop23h 14m
Multiple Airlines
mar. 2/1711:46 am
STL
-
SYD
1 stop26h 09m
Multiple Airlines
Deal found 1/19$1,174
This United Airlines deal was found by Cheapflights users on 1/19. 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.
mar. 2/32:00 pm
SYD
-
STL
2 stops25h 58m
United Airlines
mar. 2/175:25 pm
STL
-
SYD
1 stop22h 50m
United Airlines
Deal found 1/19$1,177

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 enero 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$883
(United Airlines)

One-way from

$567
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,318
Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.
Search Deals
From Australia to Lambert-St Louis
Search Deals
One-way flight from Australia to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 enero 21, 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

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

jue. 3/5

1:00 pm-10:25 pm

1 stop26h 25m

Lambert-St Louis

jue. 3/12

6:00 am-8:30 am

2 stops34h 30m

$883

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

vie. 3/27

10:30 am-4:59 pm

2 stops22h 29m

Lambert-St Louis

dom. 4/5

11:15 am-8:15 am

2 stops30h 00m

$883

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

vie. 3/6

1:00 pm-11:34 pm

2 stops27h 34m

Lambert-St Louis

vie. 3/13

6:00 am-9:00 am

2 stops35h 00m

$885

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

vie. 3/27

10:30 am-4:59 pm

2 stops22h 29m

Lambert-St Louis

sáb. 4/4

8:30 am-9:15 am

1 stop32h 45m

$885

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

vie. 3/27

9:10 am-12:21 am

2 stops31h 11m

Lambert-St Louis

dom. 4/5

6:59 pm-7:50 am

2 stops45h 51m

$890

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

vie. 3/27

10:30 am-4:59 pm

2 stops22h 29m

Lambert-St Louis

sáb. 4/4

7:05 pm-8:15 am

1 stop22h 10m

$941

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

jue. 2/19

11:20 am-8:26 pm

2 stops26h 06m

Lambert-St Louis

lun. 2/23

4:30 pm-9:35 am

2 stops24h 05m

$1,160

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

jue. 2/19

11:20 am-7:29 pm

2 stops25h 09m

Lambert-St Louis

lun. 2/23

2:31 pm-9:00 am

2 stops25h 29m

$1,160

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

mar. 3/3

11:20 am-5:13 pm

2 stops22h 53m

Lambert-St Louis

lun. 4/13

3:36 pm-7:05 am

2 stops24h 29m

$1,163

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

mar. 2/3

5:45 pm-11:59 pm

1 stop23h 14m

Lambert-St Louis

mar. 2/17

11:46 am-6:55 am

1 stop26h 09m

$1,174

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 20 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 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, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $744). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,108). 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 enero 21, 2026.
Peruse reviews from past customers who have flown with Qantas Airways and 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.
Qantas Airways
7.5
Good
973 reviews

Boarding

7.7

Comfort

7.5

Overall

7.5

Crew

8.2

Entertainment

7.2

Food

7.0

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
973 reviews
Qantas Airways
7.5
Good
973 reviews

Boarding

7.7

Comfort

7.5

Overall

7.5

Crew

8.2

Entertainment

7.2

Food

7.0

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
9,191 reviews
Qantas Airways
7.5
Good
973 reviews

Boarding

7.7

Comfort

7.5

Overall

7.5

Crew

8.2

Entertainment

7.2

Food

7.0

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?

    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 25h 09m. United Airlines provides one of the quickest options available for as low as $1,160. 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?

    When deciding which route to take from Australia to St. Louis consider Melbourne - Lambert-St Louis, Sydney Kingsford Smith - Lambert-St Louis or Devonport - Lambert-St Louis as they are the most popular.

  • 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, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $744). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,108). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Australia to St. Louis

Discover the top 2 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 2,558,603 searches. Data last updated enero 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,431FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,110Average$1,789FlexibilityNo cancel feeOn-time74%

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