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St. Louis

$558+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$913
(American Airlines)

One-way from

$558
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$1,254
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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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 22, 2025.

This BYOjet deal was found by Cheapflights users on 10/22. 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.
Sat 12/611:20 amSYD - STL
2 stops22h 08mAir Canada
Sat 12/139:00 amSTL - SYD
2 stops31h 35mAir Canada
Deal found 10/22$1,142
This Gotogate deal was found by Cheapflights users on 10/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:00 pmSYD - STL
2 stops47h 22mAir Canada
Tue 12/309:00 amSTL - SYD
2 stops31h 35mAir Canada
Deal found 10/20$1,377
This lol.travel deal was found by Cheapflights users on 10/22. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/61:30 pmMEL - STL
2 stops27h 27mQantas Airways
Sat 12/131:20 pmSTL - MEL
1 stop22h 40mQantas Airways
Deal found 10/22$1,462
This Trip.com deal was found by Cheapflights users on 10/22. 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.
Sat 12/65:45 pmSYD - STL
1 stop23h 12mMultiple Airlines
Sat 12/136:55 amSTL - SYD
1 stop33h 05mMultiple Airlines
Deal found 10/22$1,466
This Qantas Airways deal was found by Cheapflights users on 10/22. 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.
Sat 12/65:45 pmSYD - STL
1 stop23h 12mQantas Airways
Sat 12/131:20 pmSTL - SYD
2 stops25h 40mQantas Airways
Deal found 10/22$1,554
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Sat 12/2711:20 amSYD - STL
1 stop29h 31mAmerican Airlines
Tue 12/306:20 amSTL - SYD
1 stop33h 40mAmerican Airlines
Deal found 10/20$1,672
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Sat 12/2711:50 amSYD - STL
1 stop21h 46mUnited Airlines
Tue 12/3011:05 amSTL - SYD
2 stops26h 15mUnited Airlines
Deal found 10/20$1,689
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Sat 12/61:00 pmMEL - STL
2 stops40h 39mUnited Airlines
Sat 12/134:45 pmSTL - MEL
2 stops26h 50mUnited Airlines
Deal found 10/22$1,948
This Qantas Airways deal was found by Cheapflights users on 10/21. 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.
Thu 11/205:05 pmLST - STL
2 stops63h 24mQantas Airways
Mon 11/247:00 amSTL - LST
2 stops44h 00mQantas Airways
Deal found 10/21$2,046
This Qantas Airways deal was found by Cheapflights users on 10/21. 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.
Thu 11/136:30 amDPO - STL
2 stops34h 12mQantas Airways
Mon 11/171:20 pmSTL - DPO
2 stops34h 15mQantas Airways
Deal found 10/21$2,218
This Qantas Airways deal was found by Cheapflights users on 10/20. 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.
Sat 12/278:00 amSYD - STL
3 stops28h 26mMultiple Airlines
Tue 12/303:30 pmSTL - SYD
3 stops28h 55mMultiple Airlines
Deal found 10/20$2,611
This Qantas Airways deal was found by Cheapflights users on 10/22. 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.
Sat 12/61:30 pmMEL - STL
3 stops26h 17mMultiple Airlines
Sat 12/133:59 pmSTL - MEL
2 stops25h 21mMultiple Airlines
Deal found 10/22$2,898

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 October 22, 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

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 2/19

12:00 pm-6:19 pm

2 stops23h 19m

Lambert-St Louis

Thu 3/12

4:43 pm-9:30 am

2 stops24h 47m

$913

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 2/19

11:30 am-10:14 pm

3 stops27h 44m

Lambert-St Louis

Thu 3/12

3:00 pm-8:30 am

2 stops25h 30m

$924

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 2/19

12:00 pm-11:08 pm

1 stop28h 08m

Lambert-St Louis

Thu 3/12

6:15 am-9:30 am

1 stop35h 15m

$1,069

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 3/6

10:10 am-6:04 pm

2 stops24h 54m

Lambert-St Louis

Tue 3/10

6:59 pm-7:00 am

2 stops44h 01m

$1,112

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 12/6

11:20 am-4:28 pm

2 stops22h 08m

Lambert-St Louis

Sat 12/13

9:00 am-9:35 am

2 stops31h 35m

$1,142

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

10:25 am-3:29 pm

2 stops45h 04m

Lambert-St Louis

Mon 3/16

4:05 pm-8:35 am

2 stops48h 30m

$1,153

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

11:20 am-11:09 pm

1 stop27h 49m

Lambert-St Louis

Mon 3/16

6:29 pm-7:25 am

2 stops44h 56m

$1,189

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 12/27

4:00 pm-10:22 pm

2 stops47h 22m

Lambert-St Louis

Tue 12/30

9:00 am-9:35 am

2 stops31h 35m

$1,377

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 2/19

12:10 pm-10:00 pm

3 stops26h 50m

Lambert-St Louis

Thu 3/12

8:00 am-9:25 am

3 stops33h 25m

$1,396

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 12/6

1:30 pm-11:57 pm

2 stops27h 27m

Lambert-St Louis

Sat 12/13

1:20 pm-5:00 am

1 stop22h 40m

$1,462

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 34 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, December is the cheapest month in which you can book a flight from Australia to St. Louis (average of $736). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,102). 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 October 22, 2025.

A simple way to save on the total cost of your ticket is to fly from Australia to St. Louis in the afternoon. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight at noon.

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 October 22, 2025.
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
922 reviews

Comfort

7.5

Crew

8.2

Overall

7.5

Boarding

7.7

Entertainment

7.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Qantas Airways
7.5
Good
922 reviews
Qantas Airways
7.5
Good
922 reviews

Comfort

7.5

Crew

8.2

Overall

7.5

Boarding

7.7

Entertainment

7.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
United Airlines
7.4
Good
8,988 reviews
Qantas Airways
7.5
Good
922 reviews

Comfort

7.5

Crew

8.2

Overall

7.5

Boarding

7.7

Entertainment

7.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

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 19m. American Airlines provides one of the quickest options available for as low as $913. The distance from Australia to St. Louis is about 9479 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Australia to St. Louis one-way?

    One-way options have recently been found by users for as low as $573 on Air Canada. Other airlines that offer cheap prices include American Airlines from $580 and Air New Zealand from $729 one-way.

  • 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, December is the cheapest month in which you can book a flight from Australia to St. Louis (average of $736). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,102). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$822Average$1,354FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,110Average$1,789FlexibilityNo cancel feeOn-time74%

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