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Cheap flights from Sydney to St. Louis from $957

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
29 Aug — 5 Sep1
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 30 July 2026.

Wed 9/913:15
SYD
-
STL
3 stops37h 02m
Multiple Airlines
Wed 16/912:17
STL
-
SYD
3 stops32h 33m
Multiple Airlines
Deal found 26/7$1,419
Wed 14/1010:20
SYD
-
STL
2 stops24h 21m
Air Canada
Sat 7/1116:05
STL
-
SYD
2 stops48h 30m
Air Canada
Deal found 28/7$1,463
Thu 27/809:20
SYD
-
STL
2 stops23h 39m
Multiple Airlines
Thu 10/908:55
STL
-
SYD
2 stops31h 25m
Multiple Airlines
Deal found 27/7$1,469
Thu 12/1111:20
SYD
-
STL
2 stops22h 37m
Air Canada
Mon 16/1108:50
STL
-
SYD
2 stops31h 45m
Air Canada
Deal found 27/7$1,473
Sun 1/1111:20
SYD
-
STL
3 stops27h 20m
Air Canada
Tue 24/1113:40
STL
-
SYD
2 stops26h 55m
Air Canada
Deal found 28/7$1,475
Thu 12/1109:20
SYD
-
STL
1 stop21h 53m
United Airlines
Mon 16/1117:55
STL
-
SYD
1 stop44h 05m
United Airlines
Deal found 29/7$1,514

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 30 July 2026.

Round-trip from

$1,419

One-way from

$957

Popular in

April

Cheapest in

September

Average price

$1,525
9/9-16/9
  • 9/9-16/9
  • 6 total stops
  • 69h 35m total
  • Sydney to St. Louis
Search Deals
Qantas Airways
  • Qantas Airways
  • 31/8
  • 2 total stops
  • 29h 42m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($195 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($74 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 30 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 12/11

11:20-23:15

3 stops28h 55m

Lambert-St Louis

Mon 16/11

08:50-09:35

2 stops31h 45m

$1,485

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,514

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

10:20-17:59

1 stop22h 39m

Lambert-St Louis

Thu 10/9

13:36-07:00

2 stops26h 24m

$1,525

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 1/12

09:20-22:06

1 stop29h 46m

Lambert-St Louis

Thu 31/12

06:15-06:20

1 stop31h 05m

$1,745
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 9/9

12:00-19:07

1 stop22h 07m

Lambert-St Louis

Wed 16/9

14:30-07:05

2 stops25h 35m

$1,758

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 1/11

11:20-00:45

1 stop29h 25m

Lambert-St Louis

Tue 24/11

14:54-09:00

2 stops25h 06m

$1,809
Cheapest one-way

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 31/8

20:00-23:42

3 stops42h 42m

$1,725
Fastest single journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 31/8

12:00-18:05

1 stop21h 05m

$1,817

Flights are sorted by cheapest return flights first.

Deals found on 28/7

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 $1,495). Flying from Sydney to St. Louis in April is currently the most expensive (average of $2,341). 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?

Airfare is below average for this route at the moment.

Sydney to St. Louis flights typically cost between $1,530 and $1,744 in September.
The cheapest return price found within the last 5 days was $1,419 on Multiple Airlines (9 Sept–16 Sept).

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 30 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
1,073 reviews
Check prices

Crew

8.1

Boarding

7.7

Comfort

7.4

Overall

7.5

Food

7.0

Entertainment

7.2

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
1,073 reviews
Qantas Airways
7.5
Good
1,073 reviews
Check prices

Crew

8.1

Boarding

7.7

Comfort

7.4

Overall

7.5

Food

7.0

Entertainment

7.2

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
10,046 reviews
Qantas Airways
7.5
Good
1,073 reviews
Check prices

Crew

8.1

Boarding

7.7

Comfort

7.4

Overall

7.5

Food

7.0

Entertainment

7.2

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
11,842 reviews
Qantas Airways
7.5
Good
1,073 reviews
Check prices

Crew

8.1

Boarding

7.7

Comfort

7.4

Overall

7.5

Food

7.0

Entertainment

7.2

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 21h 53m. 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 $1,203. Additional round-trip tickets that might be worth considering are offered by American Airlines and Qantas Airways, with the lowest prices starting at $1,498 and $1,507, respectively. Users have found that United Airlines is 32% 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 $1,495). Flying from Sydney to St. Louis in April is currently the most expensive (average of $2,341). 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 30 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,203Average$1,872FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$1,498Average$1,805FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,507Average$1,797FlexibilityNo 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 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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