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St. Louis

$816+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,294
(United Airlines)

One-way from

$816
(BYOjet)

Popular in

August

Cheapest in

March

Average price

$1,461
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 ($131 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 April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:30 amSYD - STL
2 stops24h 23mUnited Airlines
Sat 11/87:00 pmSTL - SYD
1 stop21h 15mUnited Airlines
Deal found 4/28$1,294
This United Airlines deal was found by Cheapflights users on 4/29. 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 6/1910:55 amMEL - STL
2 stops26h 50mUnited Airlines
Thu 6/261:42 pmSTL - MEL
2 stops27h 33mUnited Airlines
Deal found 4/29$1,372
This Delta deal was found by Cheapflights users on 4/29. 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 7/79:25 amSYD - STL
2 stops38h 01mDelta
Fri 7/1810:30 amSTL - SYD
2 stops29h 05mDelta
Deal found 4/29$1,375
This Ovago deal was found by Cheapflights users on 4/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/288:55 amSYD - STL
2 stops53h 09mJapan Airlines
Wed 6/47:00 amSTL - SYD
2 stops32h 20mJapan Airlines
Deal found 4/28$1,391
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Sun 10/510:20 amSYD - STL
3 stops49h 37mAir Canada
Sat 10/111:30 pmSTL - SYD
2 stops50h 50mAir Canada
Deal found 4/29$1,585
This American Airlines deal was found by Cheapflights users on 4/29. 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 5/1210:25 amSYD - STL
2 stops23h 08mAmerican Airlines
Sat 5/316:52 amSTL - SYD
1 stop33h 13mAmerican Airlines
Deal found 4/29$1,677
This Ovago deal was found by Cheapflights users on 4/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:45 pmSYD - STL
1 stop20h 19mQantas Airways
Sat 5/316:52 amSTL - SYD
1 stop33h 38mQantas Airways
Deal found 4/28$1,757
This Gotogate deal was found by Cheapflights users on 4/29. 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.
Fri 6/136:00 amMEL - STL
3 stops28h 43mAir Canada
Fri 6/207:30 amSTL - MEL
3 stops36h 35mAir Canada
Deal found 4/29$1,809
This Booking.com deal was found by Cheapflights users on 4/29. 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.
Thu 6/196:00 amMEL - STL
3 stops28h 40mMultiple Airlines
Thu 6/267:30 amSTL - MEL
3 stops37h 05mMultiple Airlines
Deal found 4/29$1,897
This Booking.com deal was found by Cheapflights users on 4/29. 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.
Sun 10/59:55 pmSYD - STL
3 stops56h 24mTurkish Airlines
Sat 10/113:30 pmSTL - SYD
3 stops60h 30mTurkish Airlines
Deal found 4/29$2,022
This Air New Zealand deal was found by Cheapflights users on 4/28. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1811:50 amSYD - STL
3 stops27h 09mMultiple Airlines
Sat 11/811:45 amSTL - SYD
3 stops29h 40mMultiple Airlines
Deal found 4/28$2,167
This Gurufare deal was found by Cheapflights users on 4/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:45 amMEL - STL
2 stops34h 23mCathay Pacific
Fri 1/211:14 amSTL - MEL
2 stops42h 46mCathay Pacific
Deal found 4/28$2,223

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 April 29, 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 8/18

9:30 am-6:53 pm

2 stops24h 23m

Lambert-St Louis

Sat 11/8

7:00 pm-9:15 am

1 stop21h 15m

$1,294

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/19

10:55 am-5:03 am

1 stop33h 08m

Lambert-St Louis

Thu 6/26

5:41 pm-8:15 am

1 stop23h 34m

$1,372

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 7/7

9:25 am-8:26 am

2 stops38h 01m

Lambert-St Louis

Fri 7/18

10:30 am-6:35 am

2 stops29h 05m

$1,375

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 5/28

8:55 am-11:04 pm

2 stops53h 09m

Lambert-St Louis

Wed 6/4

7:00 am-6:20 am

2 stops32h 20m

$1,391

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 10/5

10:20 am-7:57 pm

3 stops49h 37m

Lambert-St Louis

Sat 10/11

1:30 pm-8:20 am

2 stops50h 50m

$1,585

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

10:25 am-6:33 pm

2 stops23h 08m

Lambert-St Louis

Sat 5/31

6:52 am-7:05 am

1 stop33h 13m

$1,677

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 5/12

5:45 pm-11:04 pm

1 stop20h 19m

Lambert-St Louis

Sat 5/31

6:52 am-7:30 am

1 stop33h 38m

$1,757

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Fri 6/13

6:00 am-7:43 pm

3 stops28h 43m

Lambert-St Louis

Fri 6/20

7:30 am-11:05 am

3 stops36h 35m

$1,809

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Thu 6/19

6:00 am-7:40 pm

3 stops28h 40m

Lambert-St Louis

Thu 6/26

7:30 am-11:35 am

3 stops37h 05m

$1,897

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 10/5

9:55 pm-2:19 pm

3 stops56h 24m

Lambert-St Louis

Sat 10/11

3:30 pm-8:00 pm

3 stops60h 30m

$2,022

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 14 results
1
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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 April 29, 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 April 29, 2025.
To help decide which airline to fly from Australia to St. Louis, see what other customers have to say about Japan Airlines, Delta and Qantas Airways. 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
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,459 reviews
Japan Airlines
8.3
Very good
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Delta
8.0
Very good
7,929 reviews
Japan Airlines
8.3
Very good
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qantas Airways
7.5
Good
829 reviews
Japan Airlines
8.3
Very good
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Cathay Pacific
7.5
Good
852 reviews
Japan Airlines
8.3
Very good
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
United Airlines
7.4
Good
8,696 reviews
Japan Airlines
8.3
Very good
1,459 reviews

Food

7.7

Comfort

8.2

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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 $816 on Air Canada. Other airlines that offer cheap prices include United Airlines from $848 and Cathay Pacific from $1,213 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 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, 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
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

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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 April 29, 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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