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$1,097+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
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 febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,097
(United Airlines)

Popular in

August

Cheapest in

March

Average price

$1,263
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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Highest demand for flights based on searches. 9% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in February 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 febrero 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/20. 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.
lun. 5/129:30 amSYD - STL
2 stops42h 15mUnited Airlines
sáb. 5/318:25 amSTL - SYD
2 stops55h 35mUnited Airlines
Deal found 2/20$1,097
This Air Canada deal was found by Cheapflights users on 2/20. 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.
lun. 5/129:20 amSYD - STL
2 stops42h 16mAir Canada
sáb. 5/311:30 pmSTL - SYD
2 stops50h 50mAir Canada
Deal found 2/20$1,109
This United Airlines deal was found by Cheapflights users on 2/20. 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.
jue. 10/3012:00 pmMEL - STL
1 stop21h 03mUnited Airlines
vie. 1/210:30 amSTL - MEL
2 stops30h 00mUnited Airlines
Deal found 2/20$1,350
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/313:35 pmMEL - STL
1 stop22h 59mAmerican Airlines
vie. 1/25:21 amSTL - MEL
1 stop30h 39mAmerican Airlines
Deal found 2/20$1,513
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/110:10 amSYD - STL
1 stop28h 59mAmerican Airlines
lun. 6/306:29 amSTL - SYD
1 stop33h 36mAmerican Airlines
Deal found 2/20$1,606
This Jettzy deal was found by Cheapflights users on 2/19. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/69:10 amSYD - STL
1 stop29h 06mQantas Airways
dom. 4/136:15 amSTL - SYD
1 stop33h 50mQantas Airways
Deal found 2/19$1,654
This Air New Zealand deal was found by Cheapflights users on 2/20. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/1811:50 amSYD - STL
3 stops26h 49mMultiple Airlines
sáb. 11/84:17 pmSTL - SYD
2 stops23h 28mMultiple Airlines
Deal found 2/20$2,032
This Qantas Airways deal was found by Cheapflights users on 2/20. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/306:05 amMEL - STL
2 stops23h 57mMultiple Airlines
vie. 1/212:52 pmSTL - MEL
3 stops28h 43mMultiple Airlines
Deal found 2/20$2,039
This Ovago deal was found by Cheapflights users on 2/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2912:45 amMEL - STL
2 stops33h 18mCathay Pacific
vie. 1/211:14 amSTL - MEL
2 stops32h 16mCathay Pacific
Deal found 2/20$2,267
This Turkish Airlines deal was found by Cheapflights users on 2/20. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/19:55 pmSYD - STL
3 stops56h 47mTurkish Airlines
lun. 6/308:10 amSTL - SYD
3 stops43h 50mTurkish Airlines
Deal found 2/20$2,556

Find flights from Australia to St. Louis within your budget

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 febrero 20, 2025.

Fly from

Australia

Fly to

St. Louis

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 5/12

9:30 am-12:45 pm

2 stops42h 15m

Lambert-St Louis

sáb. 5/31

8:25 am-7:00 am

2 stops55h 35m

$1,097

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 5/12

9:20 am-12:36 pm

2 stops42h 16m

Lambert-St Louis

sáb. 5/31

1:30 pm-7:20 am

2 stops50h 50m

$1,109

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

dom. 4/6

9:30 am-12:47 pm

2 stops42h 17m

Lambert-St Louis

dom. 4/13

1:43 pm-8:15 am

2 stops27h 32m

$1,552

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

mar. 4/1

10:10 am-11:09 pm

1 stop28h 59m

Lambert-St Louis

lun. 6/30

6:29 am-7:05 am

1 stop33h 36m

$1,606

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

dom. 4/6

9:10 am-11:16 pm

1 stop29h 06m

Lambert-St Louis

dom. 4/13

6:15 am-7:05 am

1 stop33h 50m

$1,654

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

dom. 4/6

3:05 pm-7:29 pm

1 stop19h 24m

Lambert-St Louis

dom. 4/13

9:41 am-5:00 am

1 stop28h 19m

$1,656

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

lun. 8/18

11:50 am-11:39 pm

3 stops26h 49m

Lambert-St Louis

sáb. 11/8

4:17 pm-8:45 am

2 stops23h 28m

$2,032

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

dom. 4/6

3:05 pm-11:33 pm

2 stops23h 28m

Lambert-St Louis

dom. 4/13

3:44 pm-10:05 am

3 stops27h 21m

$2,249

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

mar. 4/1

9:55 pm-2:42 pm

3 stops56h 47m

Lambert-St Louis

lun. 6/30

8:10 am-7:00 pm

3 stops43h 50m

$2,556

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

sáb. 4/5

12:45 am-11:16 pm

2 stops38h 31m

Lambert-St Louis

dom. 4/13

6:15 am-10:15 pm

2 stops49h 00m

$2,649

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Australia to St. Louis

Get recent, data-driven insights about flights from Australia to St. Louis including ideal travel times, pricing trends, and more.

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 febrero 20, 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 febrero 20, 2025.
To help decide which airline to fly from Australia to St. Louis, see what other customers have to say about Cathay Pacific, 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.
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

Cathay Pacific
7.5
Good
821 reviews
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

Qantas Airways
7.4
Good
814 reviews
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

United Airlines
7.4
Good
8,766 reviews
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

Turkish Airlines
7.3
Good
3,832 reviews
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

American Airlines
7.2
Good
10,000 reviews
Cathay Pacific
7.5
Good
821 reviews

Comfort

7.6

Food

7.3

Entertainment

7.7

Overall

7.5

Crew

8.0

Boarding

7.9

Reviews

1 / 20

6.0
Good

Anonymous,Jan 2025

MAN - HKG

An airline like Cathy Pacific should not serve vegetarian meal for people who pre-booked Muslim meal. Also, the quality / variety of the meals can be improved.

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, Melbourne - 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, 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
Alton
Farmington
Chesterfield

Browse thousands of different options on Cheapflights for your next trip

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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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,101Average$1,179FlexibilityNo cancel feeOn-time74%
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