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$796+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,094
(Booking.com)

One-way from

$796
(Trip.com)

Popular in

August

Cheapest in

March

Average price

$1,151
Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.
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From Australia to Lambert-St Louis
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One-way flight from Australia to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($127 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 March 28, 2025.

This Booking.com deal was found by Cheapflights users on 3/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:20 amSYD - STL
2 stops49h 23mAir Canada
Mon 5/197:30 amSTL - SYD
2 stops32h 50mAir Canada
Deal found 3/28$1,094
This Trip.com deal was found by Cheapflights users on 3/27. 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.
Mon 5/121:45 pmMEL - STL
2 stops24h 19mMultiple Airlines
Mon 5/196:52 amSTL - MEL
2 stops38h 03mMultiple Airlines
Deal found 3/27$1,216
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Thu 7/1710:55 amMEL - STL
2 stops26h 50mUnited Airlines
Tue 8/269:13 amSTL - MEL
2 stops32h 02mUnited Airlines
Deal found 3/27$1,314
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:20 amSYD - STL
1 stop21h 25mUnited Airlines
Sat 11/85:18 pmSTL - SYD
2 stops44h 42mUnited Airlines
Deal found 3/27$1,321
This Jetabroad deal was found by Cheapflights users on 3/27. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/218:35 amMEL - STL
2 stops35h 19mAir New Zealand
Tue 8/264:32 pmSTL - MEL
2 stops27h 18mAir New Zealand
Deal found 3/27$1,399
This Gurufare deal was found by Cheapflights users on 3/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:10 amSYD - STL
1 stop28h 54mQantas Airways
Sat 5/316:52 amSTL - SYD
1 stop33h 38mQantas Airways
Deal found 3/27$1,653
This American Airlines deal was found by Cheapflights users on 3/27. 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 5/119:10 amSYD - STL
1 stop28h 54mAmerican Airlines
Sun 5/186:52 amSTL - SYD
1 stop33h 13mAmerican Airlines
Deal found 3/27$1,658
This Qantas Airways deal was found by Cheapflights users on 3/27. 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.
Mon 8/1812:10 pmSYD - STL
2 stops24h 39mMultiple Airlines
Sat 11/81:55 pmSTL - SYD
3 stops26h 55mMultiple Airlines
Deal found 3/27$1,777
This Aunt Betty deal was found by Cheapflights users on 3/27. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/96:00 amMEL - STL
3 stops28h 43mAir Canada
Mon 7/149:15 amSTL - MEL
3 stops35h 20mAir Canada
Deal found 3/27$1,910
This Gurufare deal was found by Cheapflights users on 3/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:45 amMEL - STL
2 stops33h 18mCathay Pacific
Fri 1/211:14 amSTL - MEL
2 stops32h 16mCathay Pacific
Deal found 3/27$2,228

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 March 28, 2025.
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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

9:20 am-7:43 pm

2 stops49h 23m

Lambert-St Louis

Mon 5/19

7:30 am-7:20 am

2 stops32h 50m

$1,094

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 5/12

1:45 pm-11:04 pm

2 stops24h 19m

Lambert-St Louis

Mon 5/19

6:52 am-11:55 am

2 stops38h 03m

$1,216

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 7/17

10:55 am-4:45 pm

1 stop20h 50m

Lambert-St Louis

Tue 8/26

5:45 pm-8:15 am

1 stop23h 30m

$1,314

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

10:20 am-4:45 pm

1 stop21h 25m

Lambert-St Louis

Sat 11/8

5:18 pm-7:00 am

2 stops44h 42m

$1,321

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/21

8:35 am-4:54 am

2 stops35h 19m

Lambert-St Louis

Tue 8/26

4:32 pm-10:50 am

2 stops27h 18m

$1,399

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

9:10 am-11:04 pm

1 stop28h 54m

Lambert-St Louis

Sat 5/31

6:52 am-7:30 am

1 stop33h 38m

$1,653

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 5/11

9:10 am-11:04 pm

1 stop28h 54m

Lambert-St Louis

Sun 5/18

6:52 am-7:05 am

1 stop33h 13m

$1,658

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

12:10 pm-9:49 pm

2 stops24h 39m

Lambert-St Louis

Sat 11/8

1:55 pm-9:50 am

3 stops26h 55m

$1,777

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 6/9

6:00 am-7:43 pm

3 stops28h 43m

Lambert-St Louis

Mon 7/14

9:15 am-11:35 am

3 stops35h 20m

$1,910

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 7/21

1:45 pm-11:20 pm

2 stops24h 35m

$796

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 12 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, August is the cheapest month in which you can book a flight from Australia to St. Louis (average of $311). Flying from Australia to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from AU to STL?

Find hourly flight availability from Australia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Australia to St. Louis as you normally would.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 March 28, 2025.
To help decide which airline to fly from Australia to St. Louis, see what other customers have to say about Air New Zealand, Qantas Airways and United Airlines. 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.
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Air New Zealand
7.9
Good
455 reviews
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Qantas Airways
7.5
Good
811 reviews
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
United Airlines
7.4
Good
8,603 reviews
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
American Airlines
7.2
Good
10,000 reviews
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.
Air Canada
7.0
Good
8,986 reviews
Air New Zealand
7.9
Good
455 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.4

Comfort

8.0

Crew

8.5

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2025

SFO - CHC

Wifi was $20 for the whole flight--way too expensive! On a similar flight operated by Air New Zealand, wifi was free, and it should be included in the ticket price.

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.

  • What are the most popular routes from Australia to St. Louis?

    When deciding which route to take from Australia to St. Louis consider Sydney Kingsford Smith - Lambert-St Louis, Devonport - Lambert-St Louis or Launceston - 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, August is the cheapest month in which you can book a flight from Australia to St. Louis (average of $311). Flying from Australia to St. Louis in March is currently the most expensive (average of $356). 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 Australia?

Book flights to Australia if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,101Average$1,192FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,300Average$1,431FlexibilityNo cancel feeOn-time69%
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