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Cheap flights from Sydney to St. Louis from $865

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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
14 Aug — 21 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Sydney to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Sydney to St. Louis
Explore the most affordable flight options available from Sydney to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2026.

Thu 10/909:10
SYD
-
STL
2 stops40h 10m
American Airlines
Sun 13/910:14
STL
-
SYD
1 stop29h 41m
American Airlines
Deal found 11/7$1,440
Mon 12/1010:10
SYD
-
STL
1 stop29h 36m
American Airlines
Thu 5/1115:59
STL
-
SYD
1 stop21h 56m
American Airlines
Deal found 14/7$1,460
Tue 25/817:50
SYD
-
STL
1 stop20h 09m
Qantas Airways
Thu 10/906:00
STL
-
SYD
1 stop34h 05m
Qantas Airways
Deal found 15/7$1,471
Sat 22/809:10
SYD
-
STL
1 stop28h 49m
Qantas Airways
Sat 29/806:00
STL
-
SYD
1 stop34h 05m
Qantas Airways
Deal found 11/7$1,498
Tue 25/809:30
SYD
-
STL
2 stops22h 04m
United Airlines
Thu 10/912:59
STL
-
SYD
2 stops27h 01m
United Airlines
Deal found 15/7$1,507
Fri 14/809:10
SYD
-
STL
1 stop28h 49m
Qantas Airways
Fri 21/806:00
STL
-
SYD
1 stop34h 05m
Qantas Airways
Deal found 14/7$1,531
Fri 14/809:10
SYD
-
STL
2 stops23h 55m
American Airlines
Fri 21/815:32
STL
-
SYD
2 stops24h 33m
American Airlines
Deal found 14/7$1,545

Find flight deals from Sydney to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 15 July 2026.

Round-trip from

$1,440

One-way from

$865

Popular in

April

Cheapest in

September

Average price

$2,000
American Airlines
  • American Airlines
  • 10/9-13/9
  • 3 total stops
  • 69h 51m total
  • Sydney to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 30/7
  • 2 total stops
  • 24h 22m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($352 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($66 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sydney 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 15 July 2026.
Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

09:10-10:20

2 stops40h 10m

Lambert-St Louis

Sun 13/9

10:14-06:55

1 stop29h 41m

$1,440

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/8

09:30-16:34

2 stops22h 04m

Lambert-St Louis

Thu 10/9

12:59-07:00

2 stops27h 01m

$1,507

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sun 9/8

06:00-07:05

1 stop34h 05m

$1,564

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/9

12:00-16:40

1 stop19h 40m

Lambert-St Louis

Sun 13/9

06:00-07:05

1 stop34h 05m

$1,607
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 9/9

10:20-18:39

1 stop23h 19m

Lambert-St Louis

Sat 3/10

16:49-07:55

2 stops23h 06m

$1,611

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

09:15-17:53

2 stops23h 38m

Lambert-St Louis

Sun 9/8

06:30-06:50

2 stops33h 20m

$1,617

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/10

10:20-20:00

2 stops25h 40m

Lambert-St Louis

Thu 5/11

07:33-09:35

3 stops33h 02m

$2,319
Cheapest one-way

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:10-18:32

2 stops24h 22m

$865
Fastest single journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 20/7

09:10-16:28

2 stops22h 18m

$866

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Sorted by cheapest first

Best time to book a flight from Sydney to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Sydney 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 Sydney to St. Louis

What is the cheapest month to book a flight from Sydney to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,485). Flying from Sydney to St. Louis in April is currently the most expensive (average of $2,326). 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.

How much does it cost for a return flight from Sydney to St. Louis?

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 15 July 2026.
Get a feel of what it's like to fly with Qantas Airways,United Airlines, andAmerican Airlines from Sydney to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
1,061 reviews
Check prices

Crew

8.1

Entertainment

7.2

Comfort

7.4

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
Qantas Airways
7.5
Good
1,061 reviews
Qantas Airways
7.5
Good
1,061 reviews
Check prices

Crew

8.1

Entertainment

7.2

Comfort

7.4

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
United Airlines
7.4
Good
9,993 reviews
Qantas Airways
7.5
Good
1,061 reviews
Check prices

Crew

8.1

Entertainment

7.2

Comfort

7.4

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!
American Airlines
7.1
Good
11,811 reviews
Qantas Airways
7.5
Good
1,061 reviews
Check prices

Crew

8.1

Entertainment

7.2

Comfort

7.4

Boarding

7.7

Food

7.0

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Tania,May 2026

SYD - DFW

The trip was great and the flight attendants were lovely. It was my honeymoon and ai thought I lost my gold brecelet. They searched until they found it and gave us a bottle of champaign to celebrate our honeymoon. They were lovely!

Related info for your journey

Find useful and relevant information for your journey from Sydney to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Departing from Sydney to St. Louis will take you 22h 04m. The distance from Sydney to St. Louis is about 14571 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Sydney to St. Louis round-trip?

    Flying on United Airlines is currently your cheapest option to St. Louis, with prices starting at $1,195. Additional round-trip tickets that might be worth considering are offered by Qantas Airways and American Airlines, with the lowest prices starting at $1,497 and $1,639, respectively. Users have found that United Airlines is 34% cheaper than the other options available to this destination.

  • Can I find deals for flights from Sydney to St. Louis that include hotel bookings?

    Yes. In addition to deals on Sydney to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Sydney to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to St. Louis.

  • Can I find deals for business class flights from Sydney to St. Louis?

    Yes. Cheapflights offers flight deals from Sydney 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 Sydney to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,485). Flying from Sydney to St. Louis in April is currently the most expensive (average of $2,326). 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

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Alternative routes for Sydney to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Kansas City flights

Top 3 airlines flying from Sydney to St. Louis

Discover the top 3 airlines that operate flights from Sydney 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 15 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,195Average$1,860FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,497Average$1,786FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,639Average$1,794FlexibilityNo cancel feeOn-time71%
Search American Airlines 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 Sydney to St. Louis?

When you search for this flight from Sydney 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 Sydney to St. Louis?

Cheapflights simply makes it quick and affordable to book flights from Sydney 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 Sydney to St. Louis with no change fees?

Yes! Cheapflights helps users easily find flights from Sydney to St. Louis with no change fees.

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

Not ready to book yet? You can track prices for flights from Sydney to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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