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$676+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
Jun 18 — Jun 251
Wed 6/18
Wed 6/25
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 June 13, 2025.

Round-trip from

$1,043
(Air Canada)

One-way from

$676
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$1,211
From Australia to Lambert-St Louis
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One-way flight from Australia to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($158 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 June 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 June 13, 2025.

This Air Canada deal was found by Cheapflights users on 6/12. 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.
Tue 10/2110:20 amSYD - STL
2 stops44h 58mMultiple Airlines
Tue 11/114:43 pmSTL - SYD
2 stops23h 52mMultiple Airlines
Deal found 6/12$1,043
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/185:45 pmSYD - STL
2 stops45h 31mAmerican Airlines
Sat 11/81:55 pmSTL - SYD
1 stop24h 00mAmerican Airlines
Deal found 6/13$1,083
This Air Canada deal was found by Cheapflights users on 6/13. 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.
Tue 8/126:00 amMEL - STL
3 stops28h 45mAir Canada
Tue 8/199:15 amSTL - MEL
3 stops34h 50mAir Canada
Deal found 6/13$1,098
This Delta deal was found by Cheapflights users on 6/12. 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.
Mon 8/189:25 amSYD - STL
2 stops28h 49mDelta
Sat 11/812:10 pmSTL - SYD
2 stops27h 25mDelta
Deal found 6/12$1,111
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines 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 11/811:10 amSTL - SYD
1 stop26h 50mUnited Airlines
Deal found 6/11$1,129
This Aunt Betty deal was found by Cheapflights users on 6/12. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:10 amSYD - STL
1 stop28h 43mQantas Airways
Tue 11/116:15 amSTL - SYD
1 stop33h 45mQantas Airways
Deal found 6/12$1,130
This BYOjet deal was found by Cheapflights users on 6/12. 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.
Sun 7/278:35 amMEL - STL
2 stops28h 40mAir New Zealand
Sun 8/36:15 pmSTL - MEL
2 stops32h 30mAir New Zealand
Deal found 6/12$1,153
This United Airlines deal was found by Cheapflights users on 6/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1010:55 amMEL - STL
1 stop20h 50mUnited Airlines
Wed 8/2011:05 amSTL - MEL
2 stops29h 25mUnited Airlines
Deal found 6/13$1,211
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/99:45 amMEL - STL
1 stop28h 24mAmerican Airlines
Fri 8/2210:08 amSTL - MEL
1 stop27h 52mAmerican Airlines
Deal found 6/11$1,287
This Japan Airlines deal was found by Cheapflights users on 6/11. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:25 amMEL - STL
2 stops44h 47mJapan Airlines
Thu 8/218:50 amSTL - MEL
2 stops29h 55mJapan Airlines
Deal found 6/11$1,364
This Ovago deal was found by Cheapflights users on 6/10. 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.
Sun 6/228:55 amSYD - STL
2 stops53h 04mJapan Airlines
Sun 6/298:35 amSTL - SYD
2 stops54h 45mJapan Airlines
Deal found 6/10$1,388
This Gotogate deal was found by Cheapflights users on 6/10. 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 7/269:20 amSYD - STL
3 stops50h 30mAir Canada
Sat 8/24:00 pmSTL - SYD
2 stops48h 20mAir Canada
Deal found 6/10$1,428

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 June 13, 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

Tue 10/21

10:20 am-3:18 pm

2 stops44h 58m

Lambert-St Louis

Tue 11/11

4:43 pm-9:35 am

2 stops23h 52m

$1,043

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

5:45 pm-12:16 am

2 stops45h 31m

Lambert-St Louis

Sat 11/8

1:55 pm-6:55 am

1 stop24h 00m

$1,083

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Tue 8/12

6:00 am-7:45 pm

3 stops28h 45m

Lambert-St Louis

Tue 8/19

9:15 am-11:05 am

3 stops34h 50m

$1,098

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/18

9:25 am-11:14 pm

2 stops28h 49m

Lambert-St Louis

Sat 11/8

12:10 pm-8:35 am

2 stops27h 25m

$1,111

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

11:10 am-7:00 am

1 stop26h 50m

$1,129

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 10/21

10:10 am-10:53 pm

1 stop28h 43m

Lambert-St Louis

Tue 11/11

6:15 am-9:00 am

1 stop33h 45m

$1,130

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 7/27

8:35 am-10:15 pm

2 stops28h 40m

Lambert-St Louis

Sun 8/3

6:15 pm-5:45 pm

2 stops32h 30m

$1,153

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sun 8/10

10:55 am-4:45 pm

1 stop20h 50m

Lambert-St Louis

Wed 8/20

5:49 pm-8:15 am

1 stop23h 26m

$1,211

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 8/9

9:45 am-11:09 pm

1 stop28h 24m

Lambert-St Louis

Fri 8/22

10:08 am-5:00 am

1 stop27h 52m

$1,287

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 8/13

7:25 am-1:12 pm

2 stops44h 47m

Lambert-St Louis

Thu 8/21

8:50 am-5:45 am

2 stops29h 55m

$1,364

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 27 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 June 13, 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 June 13, 2025.
To help decide which airline to fly from Australia to St. Louis, see what other customers have to say about Japan Airlines, Fiji Airways and Singapore 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.
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Japan Airlines
8.3
Very good
1,490 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Fiji Airways
8.1
Very good
194 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Singapore Airlines
8.1
Very good
1,304 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Delta
8.0
Very good
7,951 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Air New Zealand
8.0
Very good
483 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Entertainment

7.8

Crew

8.7

Boarding

8.4

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.

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 cheapest airlines to fly from Australia to St. Louis one-way?

    One-way options have recently been found by users for as low as $706 on Air Canada. Other airlines that offer cheap prices include United Airlines from $727 and American Airlines from $779 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, 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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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 June 13, 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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