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Cheap flights from Sydney to St. Louis from $1,256

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
23 Jul — 30 Jul1
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 18 July 2025.

Round-trip from

$1,263

Popular in

August

Cheapest in

November

Average price

$2,368
American Airlines
  • American Airlines
  • 18/8-8/11
  • 4 total stops
  • 48h 20m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($495 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease ($137 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 18 July 2025.

Mon 18/809:10SYD - STL
1 stop28h 59mAmerican Airlines
Sat 8/1111:20STL - SYD
2 stops28h 40mAmerican Airlines
Deal found 18/7$1,256
Fri 8/809:25SYD - STL
2 stops29h 28mDelta
Fri 15/811:28STL - SYD
2 stops28h 07mDelta
Deal found 17/7$1,308
Mon 1/909:20SYD - STL
2 stops49h 37mMultiple Airlines
Mon 8/916:40STL - SYD
2 stops23h 40mMultiple Airlines
Deal found 18/7$1,774
Thu 27/1112:10SYD - STL
1 stop21h 17mUnited Airlines
Thu 11/1213:35STL - SYD
2 stops26h 30mUnited Airlines
Deal found 17/7$1,905
Mon 1/909:20SYD - STL
2 stops49h 37mAir Canada
Mon 8/913:30STL - SYD
3 stops50h 50mAir Canada
Deal found 18/7$1,998
Sat 9/806:25SYD - STL
2 stops31h 44mQantas Airways
Fri 22/806:45STL - SYD
1 stop33h 45mQantas Airways
Deal found 17/7$2,203

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 18 July 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

Mon 18/8

09:10-18:29

2 stops24h 19m

Lambert-St Louis

Sat 8/11

11:20-09:00

2 stops28h 40m

$1,256

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 8/8

09:25-23:53

2 stops29h 28m

Lambert-St Louis

Fri 15/8

11:28-06:35

2 stops28h 07m

$1,308

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/9

09:20-19:57

2 stops49h 37m

Lambert-St Louis

Mon 8/9

16:40-07:20

2 stops23h 40m

$1,774

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/11

12:10-16:27

1 stop21h 17m

Lambert-St Louis

Thu 11/12

13:35-09:05

2 stops26h 30m

$1,905

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/9

09:20-19:57

2 stops49h 37m

Lambert-St Louis

Mon 8/9

13:30-07:20

3 stops50h 50m

$1,998

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 9/8

06:25-23:09

2 stops31h 44m

Lambert-St Louis

Fri 22/8

06:45-07:30

1 stop33h 45m

$2,203

Flights are sorted by cheapest return flights first.

Deals found on 18/7

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 18 July 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.

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 18 July 2025.
Get a feel of what it's like to fly with Delta, Qantas Airways, andUnited 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.
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,958 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Qantas Airways
7.5
Good
879 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,865 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,744 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Michael,July 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines flying from Sydney to St. Louis round-trip?

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $1,263. Additional round-trip tickets that might be worth considering are offered by Delta and Air Canada, with the lowest prices starting at $1,308 and $1,998, respectively. Users have found that American Airlines is 43% 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

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Sydney to Kansas City flights

Top 4 airlines flying from Sydney to St. Louis

Discover the top 4 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 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,492Average$2,434FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,518Average$1,826FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,749Average$2,158FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
American AirlinesCheapest$1,848Average$3,193FlexibilityNo cancel feeOn-time71%
Search American Airlines 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?

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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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