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Cheap flights from Australia to St. Louis from $870

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 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
22 Jan — 29 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Australia to St. Louis

Enter your travel dates to find the best prices.

Best flights from Australia to St. Louis
Discover carefully curated flight deals from Australia to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 December 2025.

Wed 28/110:45BNE - STL
2 stops44h 44mAir Canada
Sat 31/116:15STL - BNE
2 stops48h 30mAir Canada
Deal found 20/12$1,251
Wed 28/119:40BNE - STL
1 stop20h 19mAmerican Airlines
Sat 31/111:55STL - BNE
2 stops25h 05mAmerican Airlines
Deal found 20/12$1,253
Tue 3/211:20SYD - STL
2 stops44h 55mMultiple Airlines
Tue 10/216:15STL - SYD
2 stops24h 20mMultiple Airlines
Deal found 20/12$1,596
Sat 4/412:00MEL - STL
2 stops57h 50mUnited Airlines
Tue 14/409:10STL - MEL
2 stops32h 05mUnited Airlines
Deal found 23/12$1,649
Wed 18/217:45MEL - STL
2 stops38h 16mQantas Airways
Sun 22/218:50STL - MEL
2 stops24h 35mQantas Airways
Deal found 20/12$1,974
Wed 1/410:20SYD - STL
2 stops22h 36mMultiple Airlines
Mon 6/416:05STL - SYD
2 stops48h 15mMultiple Airlines
Deal found 21/12$1,605
Wed 1/410:20SYD - STL
2 stops22h 36mAir Canada
Mon 6/414:40STL - SYD
2 stops25h 40mAir Canada
Deal found 22/12$1,647
Sat 4/411:55MEL - STL
2 stops37h 30mUnited Airlines
Wed 15/414:40STL - MEL
2 stops26h 35mUnited Airlines
Deal found 22/12$1,907
Wed 4/214:05SYD - STL
1 stop19h 09mMultiple Airlines
Wed 11/211:55STL - SYD
2 stops27h 05mMultiple Airlines
Deal found 20/12$2,067
Wed 18/212:00MEL - STL
2 stops37h 52mAmerican Airlines
Sun 22/218:50STL - MEL
1 stop41h 10mAmerican Airlines
Deal found 20/12$2,309
Sat 7/317:30SYD - STL
2 stops23h 18mQantas Airways
Mon 9/306:38STL - SYD
1 stop34h 22mQantas Airways
Deal found 19/12$2,328
Wed 4/211:20SYD - STL
3 stops28h 38mAir Canada
Wed 11/214:45STL - SYD
2 stops25h 50mAir Canada
Deal found 20/12$2,300
Tue 3/211:20SYD - STL
1 stop29h 39mAmerican Airlines
Tue 10/207:04STL - SYD
1 stop32h 56mAmerican Airlines
Deal found 20/12$2,335
Wed 18/211:30MEL - STL
2 stops23h 14mUnited Airlines
Sun 22/215:15STL - MEL
2 stops25h 45mUnited Airlines
Deal found 21/12$2,501
Sat 7/311:20SYD - STL
3 stops28h 39mAir Canada
Mon 9/307:40STL - SYD
3 stops32h 55mAir Canada
Deal found 19/12$2,495
Wed 18/210:10LST - STL
2 stops45h 51mQantas Airways
Sun 22/206:30STL - LST
2 stops41h 05mQantas Airways
Deal found 20/12$3,008
Sat 4/414:35MEL - STL
1 stop21h 07mMultiple Airlines
Wed 15/412:06STL - MEL
1 stop25h 54mMultiple Airlines
Deal found 22/12$2,770
Wed 18/209:55DPO - STL
2 stops26h 30mQantas Airways
Sun 22/218:50STL - DPO
2 stops52h 45mQantas Airways
Deal found 20/12$3,085

Find 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 23 December 2025.

Round-trip from

$1,251

One-way from

$870

Popular in

May

Cheapest in

August

Average price

$2,419
Air Canada
  • Air Canada
  • 28/1-31/1
  • 4 total stops
  • 93h 14m total
  • Australia to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 14/1
  • 1 total stop
  • 23h 50m total
  • Australia to St. Louis
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($60 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 23 December 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

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 28/1

10:45-15:29

2 stops44h 44m

Lambert-St Louis

Sat 31/1

16:15-08:45

2 stops48h 30m

$1,251

BrisbaneSt. Louis

BNE - STL

BNESTL

Brisbane

Wed 28/1

19:40-23:59

1 stop20h 19m

Lambert-St Louis

Sat 31/1

11:55-05:00

2 stops25h 05m

$1,253

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 3/2

11:20-15:15

2 stops44h 55m

Lambert-St Louis

Tue 10/2

16:15-09:35

2 stops24h 20m

$1,596

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 1/4

10:20-16:56

2 stops22h 36m

Lambert-St Louis

Mon 6/4

16:05-07:20

2 stops48h 15m

$1,605

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 1/4

10:20-16:56

2 stops22h 36m

Lambert-St Louis

Mon 6/4

14:40-07:20

2 stops25h 40m

$1,647

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 4/4

12:00-05:50

2 stops57h 50m

Lambert-St Louis

Tue 14/4

09:10-08:15

2 stops32h 05m

$1,649

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 4/4

11:55-09:25

2 stops37h 30m

Lambert-St Louis

Wed 15/4

14:40-08:15

2 stops26h 35m

$1,907

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Wed 18/2

17:45-15:01

2 stops38h 16m

Lambert-St Louis

Sun 22/2

18:50-12:25

2 stops24h 35m

$1,974

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 4/2

14:05-16:14

1 stop19h 09m

Lambert-St Louis

Wed 11/2

11:55-08:00

2 stops27h 05m

$2,067

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 4/2

11:20-22:58

3 stops28h 38m

Lambert-St Louis

Wed 11/2

14:45-09:35

2 stops25h 50m

$2,300

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Showing 1-10 of 23 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 return 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, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,120). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,671). 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 23 December 2025.

One of the essential ways to save on airfare from Australia to St. Louis is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 14% on airfare.

What is the cheapest day to fly from Australia to St. Louis?

Use this chart to determine the cheapest time to fly return from Australia to St. Louis. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Australia to St. Louis flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 23 December 2025.
Read reviews from past customers who have flown with Qantas Airways, United Airlines, andAir Canada from Australia to St. Louis. 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.
Qantas Airways
7.5
Good
949 reviews
Check prices

Overall

7.5

Crew

8.1

Food

7.0

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Qantas Airways
7.5
Good
949 reviews
Qantas Airways
7.5
Good
949 reviews
Check prices

Overall

7.5

Crew

8.1

Food

7.0

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
United Airlines
7.4
Good
9,106 reviews
Qantas Airways
7.5
Good
949 reviews
Check prices

Overall

7.5

Crew

8.1

Food

7.0

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
Air Canada
7.1
Good
10,551 reviews
Qantas Airways
7.5
Good
949 reviews
Check prices

Overall

7.5

Crew

8.1

Food

7.0

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Reviews

1 / 20
6.0
Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

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?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Australia. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.

  • How long is the flight from Australia to St. Louis?

    Air Canada, American Airlines, and United Airlines can get you from Australia to St. Louis in just under 20h 19m. Your travel time can differ by up to 37h 31m. Airlines will cover a distance of 14074 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Most travellers choose Sydney Kingsford Smith - Lambert-St Louis, Brisbane - Lambert-St Louis or Melbourne - Lambert-St Louis when deciding on the best route from Australia to St. Louis.

  • 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 holiday 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, November is the cheapest month in which you can book a flight from Australia to St. Louis (average of $1,120). Flying from Australia to St. Louis in April is currently the most expensive (average of $1,671). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Australia to St. Louis

Discover the top 3 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 647,157 searches. Data last updated 23 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,102Average$1,734FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,232Average$1,984FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,462Average$2,185FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Australia to St. Louis?

When you search for this flight from Australia to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Australia to St. Louis?

Cheapflights simply makes it quick and affordable to book flights from Australia to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Australia to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Australia to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Australia to St. Louis become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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