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Cheap flights from Sydney to St. Louis from $965

SYD — STL
20 Nov — 27 Nov1
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

Fri 4/1214:05 -
1 stop21h 21m
Fri 11/1214:54 -
1 stop23h 01m
Deal found 20/10$2,297
Fri 4/1211:10 -
2 stops24h 16m
Fri 11/1214:54 -
2 stops25h 06m
Deal found 20/10$2,319
Fri 4/1209:55 -
2 stops25h 46m
Fri 11/1208:40 -
3 stops30h 55m
Deal found 20/10$2,413
Mon 19/1009:55 -
2 stops29h 51m
Mon 2/1108:10 -
2 stops53h 40m
Deal found 17/10$8,777
Mon 19/1010:30 -
2 stops25h 46m
Mon 2/1114:55 -
1 stop23h 05m
Deal found 18/10$15,905
Mon 19/1010:20 -
3 stops48h 21m
Mon 2/1116:05 -
2 stops48h 30m
Deal found 17/10$17,629
Mon 19/1010:10 -
1 stop29h 36m
Mon 2/1110:21 -
1 stop27h 34m
Deal found 17/10$19,683
Mon 19/1018:50 -
1 stop20h 56m
Mon 2/1112:58 -
1 stop24h 57m
Deal found 18/10$21,280

Find flight deals from Sydney to St. Louis

Round-trip from

$1,451

One-way from

$965

Popular in

January

Cheapest in

July

Average price

$1,793
American Airlines
  • American Airlines
  • 19/1-3/2
  • 3 total stops
  • 55h 19m total
  • Sydney to St. Louis
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American Airlines
  • American Airlines
  • 13/11-31/12
  • 2 total stops
  • 26h 12m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($480 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease ($145 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
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 Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Fri 13/11

11:10-20:22

2 stops26h 12m

Lambert-St Louis

Wed 31/12

00:00-16:00

Nonstop0h 00m

$965
Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Fri 13/11

09:15-14:13

1 stop21h 58m

Lambert-St Louis

Wed 31/12

00:00-16:00

Nonstop0h 00m

$968

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Fri 13/11

11:50-23:24

3 stops28h 34m

Lambert-St Louis

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,269

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 19/1

11:50-18:17

1 stop23h 27m

Lambert-St Louis

Wed 3/2

13:17-09:05

2 stops26h 48m

$1,455

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 19/1

14:05-23:30

1 stop26h 25m

Lambert-St Louis

Wed 3/2

14:28-06:25

2 stops22h 57m

$1,465

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 19/1

11:20-23:36

1 stop29h 16m

Lambert-St Louis

Wed 3/2

11:22-06:55

1 stop26h 33m

$1,468

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 31/3

10:10-23:56

1 stop29h 46m

Lambert-St Louis

Sun 4/4

14:24-06:25

2 stops25h 01m

$2,113

Flights are sorted by cheapest return flights first.

Deals found on 18/10

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

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, July is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,515). Flying from Sydney to St. Louis in January is currently the most expensive (average of $3,146). 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 $1,626 and $1,810 in November.
The cheapest return price found within the last 5 days was $1,352 on American Airlines (18 Nov–1 Dec).

Reviews of airlines servicing St. Louis

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
1,115 reviews
Check prices

Food

7.0

Boarding

7.7

Entertainment

7.2

Overall

7.5

Comfort

7.4

Crew

8.1

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
1,115 reviews
Qantas Airways
7.5
Good
1,115 reviews
Check prices

Food

7.0

Boarding

7.7

Entertainment

7.2

Overall

7.5

Comfort

7.4

Crew

8.1

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
7.3
Good
10,394 reviews
Qantas Airways
7.5
Good
1,115 reviews
Check prices

Food

7.0

Boarding

7.7

Entertainment

7.2

Overall

7.5

Comfort

7.4

Crew

8.1

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
7.0
Good
12,181 reviews
Qantas Airways
7.5
Good
1,115 reviews
Check prices

Food

7.0

Boarding

7.7

Entertainment

7.2

Overall

7.5

Comfort

7.4

Crew

8.1

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

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

    Departing from Sydney to St. Louis will take you 23h 27m. 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 $1,440. Additional round-trip tickets that might be worth considering are offered by American Airlines and Qantas Airways, with the lowest prices starting at $1,488 and $1,497, respectively. Users have found that United Airlines is 29% 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, July is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,515). Flying from Sydney to St. Louis in January is currently the most expensive (average of $3,146). 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

Alternative routes for Sydney to St. Louis

Sydney to Kansas City flights

Top 3 airlines flying from Sydney to St. Louis

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,440Average$2,259FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$1,488Average$2,024FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,497Average$1,736FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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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.

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