Find flights
When to book
Airlines
FAQs

Cheap flights from Sydney to St. Louis from $1,036

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
8 Apr — 15 Apr1
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 9 March 2026.

Wed 27/509:10
SYD
-
STL
2 stops22h 23m
American Airlines
Sun 31/509:08
STL
-
SYD
2 stops30h 57m
American Airlines
Deal found 5/3$1,579
Wed 5/811:55
SYD
-
STL
2 stops37h 12m
Air New Zealand
Sat 29/815:02
STL
-
SYD
2 stops26h 43m
Air New Zealand
Deal found 7/3$1,591
Wed 27/510:20
SYD
-
STL
1 stop22h 57m
United Airlines
Sun 31/519:23
STL
-
SYD
1 stop20h 32m
United Airlines
Deal found 5/3$1,605
Sun 19/409:10
SYD
-
STL
2 stops22h 31m
American Airlines
Sun 26/415:38
STL
-
SYD
2 stops24h 27m
American Airlines
Deal found 4/3$1,622
Mon 27/409:10
SYD
-
STL
2 stops23h 11m
American Airlines
Fri 1/515:38
STL
-
SYD
2 stops24h 27m
American Airlines
Deal found 3/3$1,625
Mon 27/409:30
SYD
-
STL
2 stops26h 43m
United Airlines
Fri 1/519:06
STL
-
SYD
1 stop20h 49m
United Airlines
Deal found 3/3$1,651
Tue 21/409:20
SYD
-
STL
2 stops26h 34m
Air Canada
Tue 28/416:30
STL
-
SYD
2 stops23h 50m
Air Canada
Deal found 7/3$1,665
Mon 27/409:10
SYD
-
STL
1 stop29h 47m
Qantas Airways
Fri 1/506:21
STL
-
SYD
1 stop33h 44m
Qantas Airways
Deal found 3/3$1,689
Sun 3/509:20
SYD
-
STL
2 stops41h 46m
Air Canada
Sun 17/507:05
STL
-
SYD
2 stops57h 15m
Air Canada
Deal found 8/3$1,776

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 9 March 2026.

Round-trip from

$1,579

One-way from

$1,036

Popular in

July

Cheapest in

May

Average price

$1,705
American Airlines
  • American Airlines
  • 27/5-31/5
  • 4 total stops
  • 53h 20m total
  • Sydney to St. Louis
Search Deals
Qantas Airways
  • Qantas Airways
  • 2/6
  • 1 total stop
  • 19h 33m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($140 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 March 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 9 March 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 27/5

09:10-23:56

1 stop29h 46m

Lambert-St Louis

Sun 31/5

14:37-07:05

2 stops25h 28m

$1,579
Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Sun 31/5

19:23-06:55

1 stop20h 32m

$1,605

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 19/4

09:10-16:41

2 stops22h 31m

Lambert-St Louis

Sun 26/4

15:38-07:05

2 stops24h 27m

$1,622

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/4

09:10-17:21

2 stops23h 11m

Lambert-St Louis

Fri 1/5

15:38-07:05

2 stops24h 27m

$1,625

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/4

09:30-21:13

2 stops26h 43m

Lambert-St Louis

Fri 1/5

19:06-06:55

1 stop20h 49m

$1,651

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 27/4

09:10-23:57

1 stop29h 47m

Lambert-St Louis

Fri 1/5

06:21-07:05

1 stop33h 44m

$1,689

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 17/5

07:05-07:20

2 stops57h 15m

$1,776

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:20-23:57

2 stops29h 37m

Lambert-St Louis

Sun 31/5

05:10-07:20

2 stops35h 10m

$1,954
Cheapest one-way
Fastest single journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/6

12:00-16:33

1 stop19h 33m

$1,036

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 8/6

09:10-18:29

2 stops24h 19m

$1,036

Flights are sorted by cheapest return flights first.

Deals found on 4/3

Showing 1-10 of 17 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, November is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $1,187). Flying from Sydney to St. Louis in December is currently the most expensive (average of $1,770). 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.

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 9 March 2026.
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
1,002 reviews
Check prices

Food

7.0

Entertainment

7.2

Crew

8.1

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Qantas Airways
7.5
Good
1,002 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Food

7.0

Entertainment

7.2

Crew

8.1

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
United Airlines
7.4
Good
9,406 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Food

7.0

Entertainment

7.2

Crew

8.1

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.
Air Canada
7.1
Good
10,796 reviews
Qantas Airways
7.5
Good
1,002 reviews
Check prices

Food

7.0

Entertainment

7.2

Crew

8.1

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Midhat,Feb 2026

WYA - ADL

Frequent delays, 3rd week in a row. Flight attendants not at all friendly.

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 57m. 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 $1,185. Additional round-trip tickets that might be worth considering are offered by Air Canada and Qantas Airways, with the lowest prices starting at $1,490 and $1,546, respectively. Users have found that United Airlines is 35% 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 $1,187). Flying from Sydney to St. Louis in December is currently the most expensive (average of $1,770). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 9 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,185Average$1,938FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,490Average$1,676FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,546Average$1,832FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.