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Cheap flights from Sydney to St. Louis from $1,071

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 16/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 20 November 2025.

Round-trip from

$1,777

One-way from

$1,071

Popular in

May

Cheapest in

November

Average price

$1,593
Air Canada
  • Air Canada
  • 4/12-8/12
  • 4 total stops
  • 93h 39m total
  • Sydney to St. Louis
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Qantas Airways
  • Qantas Airways
  • 16/12
  • 2 total stops
  • 33h 52m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($125 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($65 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find 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 20 November 2025.

Thu 4/1211:20SYD - STL
2 stops45h 09mAir Canada
Mon 8/1216:05STL - SYD
2 stops48h 30mAir Canada
Deal found 19/11$1,777
Wed 10/1213:00SYD - STL
2 stops27h 57mQantas Airways
Sat 3/115:30STL - SYD
2 stops29h 55mQantas Airways
Deal found 19/11$1,796
Fri 21/1121:55SYD - STL
2 stops34h 34mQantas Airways
Thu 27/1107:00STL - SYD
2 stops36h 15mQantas Airways
Deal found 20/11$1,896
Wed 10/1215:35SYD - STL
2 stops25h 22mQantas Airways
Fri 2/118:44STL - SYD
2 stops23h 11mQantas Airways
Deal found 19/11$1,976
Thu 4/1217:30SYD - STL
2 stops23h 27mQantas Airways
Mon 8/1206:55STL - SYD
1 stop33h 05mQantas Airways
Deal found 18/11$2,309
Thu 4/1211:20SYD - STL
2 stops38h 30mAmerican Airlines
Mon 8/1217:30STL - SYD
1 stop20h 25mAmerican Airlines
Deal found 19/11$2,336
Thu 4/1210:40SYD - STL
2 stops24h 16mDelta
Mon 8/1209:30STL - SYD
2 stops30h 00mDelta
Deal found 17/11$2,503

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 20 November 2025.
Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

Fly from

Sydney

Fly to

St. Louis

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

11:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 8/12

16:05-09:35

2 stops48h 30m

$1,777

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 22/3

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Fri 27/3

16:05-08:20

2 stops48h 15m

$1,845

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/1

08:20-23:59

2 stops32h 39m

Lambert-St Louis

Thu 29/1

17:04-10:55

2 stops24h 51m

$1,952

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/12

15:35-23:57

2 stops25h 22m

Lambert-St Louis

Fri 2/1

18:44-10:55

2 stops23h 11m

$1,976

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

17:30-23:57

2 stops23h 27m

Lambert-St Louis

Mon 8/12

06:55-09:00

1 stop33h 05m

$2,309

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 22/3

11:45-22:16

2 stops26h 31m

Lambert-St Louis

Fri 27/3

07:41-08:45

3 stops33h 04m

$2,330

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

11:20-08:50

2 stops38h 30m

Lambert-St Louis

Mon 8/12

17:30-06:55

1 stop20h 25m

$2,336

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

17:45-23:59

2 stops23h 14m

Lambert-St Louis

Sun 7/6

14:50-07:05

2 stops25h 15m

$2,414

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

14:00-09:22

2 stops36h 22m

Lambert-St Louis

Sun 7/6

15:15-06:55

2 stops24h 40m

$2,418

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 16/12

07:05-23:57

2 stops33h 52m

$1,071

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 15 results
1
2

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, November is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,289). Flying from Sydney to St. Louis in December is currently the most expensive (average of $2,118). 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 20 November 2025.
Get a feel of what it's like to fly with Qantas Airways, United Airlines, andAir Canada 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
942 reviews
Check prices

Food

7.0

Comfort

7.5

Entertainment

7.2

Overall

7.5

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Qantas Airways
7.5
Good
942 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Comfort

7.5

Entertainment

7.2

Overall

7.5

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
United Airlines
7.4
Good
9,028 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Comfort

7.5

Entertainment

7.2

Overall

7.5

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Air Canada
7.1
Good
10,462 reviews
Qantas Airways
7.5
Good
942 reviews
Check prices

Food

7.0

Comfort

7.5

Entertainment

7.2

Overall

7.5

Boarding

7.7

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

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 32h 39m. 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 $1,291. Additional round-trip tickets that might be worth considering are offered by Air Canada and Qantas Airways, with the lowest prices starting at $1,605 and $1,704, respectively. Users have found that United Airlines is 38% 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, November is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,289). Flying from Sydney to St. Louis in December is currently the most expensive (average of $2,118). 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

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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 20 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,291Average$2,424FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,605Average$1,820FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,704Average$2,161FlexibilityNo 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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