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Cheap flights from Sydney to St. Louis from $1,318

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
6 Dec — 13 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 6 November 2025.

Round-trip from

$1,318

Popular in

December

Cheapest in

November

Average price

$1,588
Air Canada
  • Air Canada
  • 11/12-15/12
  • 4 total stops
  • 112h 49m total
  • Sydney to St. Louis
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($62 potential savings vs. average return price).
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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 6 November 2025.

Thu 11/1216:00SYD - STL
2 stops64h 29mAir Canada
Mon 15/1213:35STL - SYD
2 stops48h 20mAir Canada
Deal found 4/11$1,318
Sat 6/1216:00SYD - STL
2 stops40h 29mAir Canada
Wed 7/116:05STL - SYD
2 stops45h 50mAir Canada
Deal found 5/11$1,730
Sat 6/1211:50SYD - STL
1 stop21h 14mUnited Airlines
Wed 7/108:45STL - SYD
2 stops31h 20mUnited Airlines
Deal found 5/11$2,454
Thu 11/1217:45SYD - STL
1 stop23h 12mMultiple Airlines
Mon 15/1213:20STL - SYD
1 stop24h 35mMultiple Airlines
Deal found 4/11$2,538
Thu 11/1211:50SYD - STL
1 stop21h 14mUnited Airlines
Mon 15/1209:00STL - SYD
2 stops31h 05mUnited Airlines
Deal found 4/11$2,543
Sat 6/1216:15SYD - STL
2 stops24h 42mMultiple Airlines
Wed 7/115:20STL - SYD
3 stops28h 10mMultiple Airlines
Deal found 5/11$2,586
Sat 6/1217:45SYD - STL
1 stop23h 12mQantas Airways
Wed 7/117:04STL - SYD
1 stop20h 51mQantas Airways
Deal found 5/11$2,645
Fri 19/1211:20SYD - STL
1 stop29h 53mQantas Airways
Fri 26/1218:44STL - SYD
1 stop43h 11mQantas Airways
Deal found 4/11$2,729
Fri 19/1211:50SYD - STL
1 stop38h 59mUnited Airlines
Fri 26/1217:45STL - SYD
2 stops46h 20mUnited Airlines
Deal found 4/11$2,883
Fri 19/1208:45SYD - STL
3 stops27h 46mMultiple Airlines
Fri 26/1211:41STL - SYD
2 stops27h 54mMultiple Airlines
Deal found 4/11$4,581

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 6 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 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,419

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:20-23:09

1 stop27h 49m

Lambert-St Louis

Mon 16/3

18:29-06:55

2 stops44h 26m

$1,508

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

16:00-15:29

2 stops40h 29m

Lambert-St Louis

Wed 7/1

16:05-06:55

2 stops45h 50m

$1,730

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

11:50-16:04

1 stop21h 14m

Lambert-St Louis

Wed 7/1

08:45-09:05

2 stops31h 20m

$2,454

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 11/12

17:45-23:57

1 stop23h 12m

Lambert-St Louis

Mon 15/12

13:20-06:55

1 stop24h 35m

$2,538

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 11/12

11:50-16:04

1 stop21h 14m

Lambert-St Louis

Mon 15/12

09:00-09:05

2 stops31h 05m

$2,543

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

16:15-23:57

2 stops24h 42m

Lambert-St Louis

Wed 7/1

15:20-12:30

3 stops28h 10m

$2,586

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

21:40-13:54

2 stops33h 14m

Lambert-St Louis

Sun 7/6

18:20-19:45

2 stops34h 25m

$2,604

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

17:45-23:57

1 stop23h 12m

Lambert-St Louis

Wed 7/1

17:04-06:55

1 stop20h 51m

$2,645

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

11:20-11:03

2 stops40h 43m

Lambert-St Louis

Sun 7/6

16:23-07:05

2 stops23h 42m

$2,669

Flights are sorted by cheapest return flights first.

Deals found on 4/11

Showing 1-10 of 13 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 $1,285). Flying from Sydney to St. Louis in December is currently the most expensive (average of $2,127). 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 6 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
927 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

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
927 reviews
Qantas Airways
7.5
Good
927 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

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
9,003 reviews
Qantas Airways
7.5
Good
927 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

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
10,410 reviews
Qantas Airways
7.5
Good
927 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Boarding

7.7

Food

7.0

Overall

7.5

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 21h 14m. 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 $1,287. Additional round-trip tickets that might be worth considering are offered by Air Canada and Qantas Airways, with the lowest prices starting at $1,600 and $1,698, respectively. Users have found that United Airlines is 37% 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 $1,285). Flying from Sydney to St. Louis in December is currently the most expensive (average of $2,127). 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 6 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,287Average$2,416FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,600Average$1,814FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,698Average$2,154FlexibilityNo 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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