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Cheap flights from Sydney to St. Louis from $751

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
7 Sep — 14 Sep1
1 adult

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 2 September 2025.

Round-trip from

$1,435

One-way from

$751

Popular in

December

Cheapest in

November

Average price

$2,055
American Airlines
  • American Airlines
  • 22/10-23/10
  • 3 total stops
  • 55h 39m total
  • Sydney to St. Louis
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American Airlines
  • American Airlines
  • 26/11
  • 2 total stops
  • 40h 17m total
  • Sydney to St. Louis
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($52 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Sydney to St. Louis

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 2 September 2025.

Wed 22/1010:10SYD - STL
2 stops22h 13mAmerican Airlines
Thu 23/1006:39STL - SYD
1 stop33h 26mAmerican Airlines
Deal found 1/9$1,435
Wed 22/1011:50SYD - STL
2 stops23h 07mMultiple Airlines
Thu 23/1009:00STL - SYD
3 stops33h 35mMultiple Airlines
Deal found 1/9$1,792
Fri 19/1212:10SYD - STL
2 stops27h 12mUnited Airlines
Wed 7/114:45STL - SYD
2 stops25h 20mUnited Airlines
Deal found 31/8$2,781
Fri 19/1217:45SYD - STL
1 stop23h 06mAmerican Airlines
Wed 7/106:00STL - SYD
1 stop34h 00mAmerican Airlines
Deal found 31/8$3,222
Fri 19/1211:45SYD - STL
3 stops27h 37mMultiple Airlines
Wed 7/111:20STL - SYD
3 stops28h 25mMultiple Airlines
Deal found 31/8$3,433

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 2 September 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

Wed 22/10

10:10-16:23

2 stops22h 13m

Lambert-St Louis

Thu 23/10

12:23-08:05

2 stops27h 42m

$1,435

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 22/10

11:50-18:57

2 stops23h 07m

Lambert-St Louis

Thu 23/10

09:00-10:35

3 stops33h 35m

$1,792

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

16:00-15:29

2 stops40h 29m

Lambert-St Louis

Sun 7/6

13:30-07:20

3 stops50h 50m

$2,279

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

11:20-22:00

2 stops27h 40m

Lambert-St Louis

Sun 7/6

11:00-07:00

2 stops29h 00m

$2,410

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 28/11

11:20-08:58

2 stops38h 38m

$751

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/11

11:20-10:39

2 stops40h 19m

$751

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 26/11

11:20-23:42

1 stop29h 22m

$751

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 25/11

11:20-23:56

2 stops29h 36m

$751

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 15/9

09:10-22:59

1 stop28h 49m

$757

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/12

10:40-21:58

2 stops52h 18m

$774

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 12 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 time of day to fly from SYD to STL?

Find hourly flight availability from Sydney 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 2 September 2025.

It’s typically best to fly out from Sydney to St. Louis in the morning. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 2 September 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
904 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

6.9

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.
Qantas Airways
7.5
Good
904 reviews
Qantas Airways
7.5
Good
904 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

6.9

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.
United Airlines
7.4
Good
8,937 reviews
Qantas Airways
7.5
Good
904 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

6.9

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.
Air Canada
7.1
Good
10,000 reviews
Qantas Airways
7.5
Good
904 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Crew

8.2

Overall

7.5

Food

6.9

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

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 13m. The distance from Sydney to St. Louis is about 14571 km.

  • 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 $1,372. Additional round-trip tickets that might be worth considering are offered by Air Canada and Qantas Airways, with the lowest prices starting at $1,585 and $1,683, 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.

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 2 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,372Average$2,409FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,585Average$1,807FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,683Average$2,431FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

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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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