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St. Louis

$693+ Cheap flights from Sydney (SYD) to St. Louis (STL)

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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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 November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,150
(Air Canada)

One-way from

$693
(Gurufare)

Popular in

May

Cheapest in

November

Average price

$1,031
Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.
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From Sydney Kingsford Smith to Lambert-St Louis
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One-way flight from Sydney Kingsford Smith to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT 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

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 November 20, 2025.

This Air Canada deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:20 amSYD - STL
2 stops45h 09mAir Canada
Mon 12/84:05 pmSTL - SYD
2 stops48h 30mAir Canada
Deal found 11/19$1,150
This oojo deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/101:00 pmSYD - STL
2 stops27h 57mQantas Airways
Sat 1/33:30 pmSTL - SYD
2 stops29h 55mQantas Airways
Deal found 11/19$1,162
This oojo deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/219:55 pmSYD - STL
2 stops34h 34mQantas Airways
Thu 11/277:00 amSTL - SYD
2 stops36h 15mQantas Airways
Deal found 11/20$1,227
This Ovago deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:35 pmSYD - STL
2 stops25h 22mQantas Airways
Fri 1/26:44 pmSTL - SYD
2 stops23h 11mQantas Airways
Deal found 11/19$1,279
This Qantas Airways deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:30 pmSYD - STL
2 stops23h 27mQantas Airways
Mon 12/86:55 amSTL - SYD
1 stop33h 05mQantas Airways
Deal found 11/18$1,494
This American Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:20 amSYD - STL
2 stops38h 30mAmerican Airlines
Mon 12/85:30 pmSTL - SYD
1 stop20h 25mAmerican Airlines
Deal found 11/19$1,512
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:10 pmSYD - STL
1 stop21h 17mUnited Airlines
Sat 1/36:41 amSTL - SYD
1 stop30h 39mUnited Airlines
Deal found 11/19$1,689

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated November 20, 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 12/4

11:20 am-3:29 pm

2 stops45h 09m

Lambert-St Louis

Mon 12/8

4:05 pm-9:35 am

2 stops48h 30m

$1,150

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 1/8

8:20 am-11:59 pm

2 stops32h 39m

Lambert-St Louis

Thu 1/29

5:04 pm-10:55 am

2 stops24h 51m

$1,263

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 12/10

3:35 pm-11:57 pm

2 stops25h 22m

Lambert-St Louis

Fri 1/2

6:44 pm-10:55 am

2 stops23h 11m

$1,279

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/4

5:30 pm-11:57 pm

2 stops23h 27m

Lambert-St Louis

Mon 12/8

6:55 am-9:00 am

1 stop33h 05m

$1,494

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/4

11:20 am-8:50 am

2 stops38h 30m

Lambert-St Louis

Mon 12/8

5:30 pm-6:55 am

1 stop20h 25m

$1,512

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 1/10

2:00 pm-9:22 am

2 stops36h 22m

Lambert-St Louis

Sun 6/7

3:15 pm-6:55 am

2 stops24h 40m

$1,565

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 12/16

7:05 am-11:57 pm

2 stops33h 52m

$693

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 12/16

12:10 pm-4:27 pm

1 stop21h 17m

$1,082

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Compare providers for flights from Sydney to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sydney to St. Louis in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sydney-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Sydney-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Sydney-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sydney-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 $834). Flying from Sydney to St. Louis in December is currently the most expensive (average of $1,371). 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 to fly round-trip 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 November 20, 2025.
Read reviews from past customers who have flown Qantas Airways and United Airlines from Sydney to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
942 reviews

Comfort

7.5

Entertainment

7.2

Food

7.0

Crew

8.2

Boarding

7.7

Overall

7.5

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
942 reviews
Qantas Airways
7.5
Good
942 reviews

Comfort

7.5

Entertainment

7.2

Food

7.0

Crew

8.2

Boarding

7.7

Overall

7.5

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
9,028 reviews
Qantas Airways
7.5
Good
942 reviews

Comfort

7.5

Entertainment

7.2

Food

7.0

Crew

8.2

Boarding

7.7

Overall

7.5

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?

    There are many flights that can get you from Sydney to St. Louis in 32h 39m. Fly via Air Canada, Qantas Airways, or American Airlines to get the fastest option. There are 9054 mi between Sydney and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Sydney to St. Louis is United Airlines. Our recent data shows that you can find tickets from as low as $857 on this airline. An additional option worth looking into is Qantas Airways, starting at $1,110. 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 vacation 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 $834). Flying from Sydney to St. Louis in December is currently the most expensive (average of $1,371). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sydney to St. Louis

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Top 2 airlines flying from Sydney to St. Louis

Discover the top 2 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 2,558,603 searches. Data last updated November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$857Average$1,401FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,110Average$1,789FlexibilityNo cancel feeOn-time74%

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