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Cheap flights from Sydney to St. Louis from $889

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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
12 Jun — 19 Jun1
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
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 13 May 2026.

Tue 12/509:10
SYD
-
STL
2 stops23h 11m
American Airlines
Wed 20/514:37
STL
-
SYD
2 stops25h 28m
American Airlines
Deal found 8/5$1,436
Wed 10/609:30
SYD
-
STL
2 stops26h 40m
United Airlines
Wed 17/613:38
STL
-
SYD
2 stops26h 22m
United Airlines
Deal found 12/5$1,441
Wed 12/810:20
SYD
-
STL
1 stop23h 19m
United Airlines
Sat 5/917:59
STL
-
SYD
2 stops45h 56m
United Airlines
Deal found 11/5$1,445
Tue 12/509:10
SYD
-
STL
2 stops23h 11m
Qantas Airways
Wed 20/506:21
STL
-
SYD
1 stop33h 44m
Qantas Airways
Deal found 8/5$1,447
Wed 20/509:10
SYD
-
STL
2 stops25h 20m
American Airlines
Thu 28/513:19
STL
-
SYD
2 stops26h 46m
American Airlines
Deal found 9/5$1,486
Wed 12/809:10
SYD
-
STL
1 stop28h 45m
American Airlines
Sat 5/912:45
STL
-
SYD
1 stop27h 10m
American Airlines
Deal found 10/5$1,510
Wed 20/510:20
SYD
-
STL
2 stops21h 37m
United Airlines
Thu 28/514:57
STL
-
SYD
2 stops24h 58m
United Airlines
Deal found 8/5$1,513

Find 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 13 May 2026.

Round-trip from

$1,445

One-way from

$889

Popular in

July

Cheapest in

September

Average price

$1,592
United Airlines
  • United Airlines
  • 12/8-5/9
  • 3 total stops
  • 69h 15m total
  • Sydney to St. Louis
Search Deals
Qantas Airways
  • Qantas Airways
  • 30/7
  • 2 total stops
  • 25h 54m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($288 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($84 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 13 May 2026.
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 - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

09:30-21:10

2 stops26h 40m

Lambert-St Louis

Wed 17/6

13:38-07:00

2 stops26h 22m

$1,441

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 12/8

10:20-18:39

1 stop23h 19m

Lambert-St Louis

Sat 5/9

17:59-06:55

2 stops45h 56m

$1,445

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 12/8

09:30-20:38

2 stops26h 08m

Lambert-St Louis

Fri 4/9

16:40-07:00

2 stops23h 20m

$1,516

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/6

09:20-21:10

2 stops26h 50m

Lambert-St Louis

Sun 7/6

08:40-07:20

2 stops31h 40m

$1,689

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 12/8

09:20-14:02

2 stops43h 42m

Lambert-St Louis

Sat 5/9

12:10-07:20

3 stops52h 10m

$1,748

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 10/6

09:20-20:25

3 stops50h 05m

Lambert-St Louis

Wed 17/6

13:05-07:20

3 stops51h 15m

$1,925

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

09:15-19:00

2 stops24h 45m

Lambert-St Louis

Mon 20/7

08:00-06:50

2 stops31h 50m

$2,584
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

10:20-23:57

2 stops28h 37m

Lambert-St Louis

Mon 20/7

19:23-06:55

1 stop20h 32m

$2,710
Cheapest one-way

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

09:10-20:04

2 stops25h 54m

$889
Fastest single journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 30/7

10:20-18:17

1 stop22h 57m

$896

Flights are sorted by cheapest return flights first.

Deals found on 12/5

Showing 1-10 of 14 resultsSorted by cheapest first
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, September is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,185). Flying from Sydney to St. Louis in July is currently the most expensive (average of $2,475). 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 13 May 2026.
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
1,035 reviews
Check prices

Entertainment

7.2

Food

7.0

Crew

8.1

Comfort

7.4

Boarding

7.7

Overall

7.5

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
1,035 reviews
Qantas Airways
7.5
Good
1,035 reviews
Check prices

Entertainment

7.2

Food

7.0

Crew

8.1

Comfort

7.4

Boarding

7.7

Overall

7.5

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
7.4
Good
9,701 reviews
Qantas Airways
7.5
Good
1,035 reviews
Check prices

Entertainment

7.2

Food

7.0

Crew

8.1

Comfort

7.4

Boarding

7.7

Overall

7.5

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
7.1
Good
11,663 reviews
Qantas Airways
7.5
Good
1,035 reviews
Check prices

Entertainment

7.2

Food

7.0

Crew

8.1

Comfort

7.4

Boarding

7.7

Overall

7.5

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

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 26h 40m. 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 $1,152. Additional round-trip tickets that might be worth considering are offered by American Airlines and Qantas Airways, with the lowest prices starting at $1,594 and $1,679, respectively. Users have found that United Airlines is 36% 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, September is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,185). Flying from Sydney to St. Louis in July is currently the most expensive (average of $2,475). 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 13 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,152Average$1,681FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$1,594Average$1,735FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,679Average$1,781FlexibilityNo 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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