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St. Louis

$486+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — STL
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
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 October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,167
(Jetabroad)

One-way from

$486
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,298
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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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 2, 2025.

This Jetabroad deal was found by Cheapflights users on 10/2. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3011:45 amSYD - STL
2 stops23h 02mAir New Zealand
Thu 11/68:20 amSTL - SYD
2 stops33h 10mAir New Zealand
Deal found 10/2$1,167
This Booking.com deal was found by Cheapflights users on 10/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2111:20 amSYD - STL
2 stops27h 34mAir Canada
Mon 12/14:05 pmSTL - SYD
2 stops45h 50mAir Canada
Deal found 10/2$1,398
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/2111:50 amSYD - STL
1 stop21h 00mUnited Airlines
Mon 12/19:00 amSTL - SYD
2 stops29h 00mUnited Airlines
Deal found 10/2$1,419
This BYOjet deal was found by Cheapflights users on 9/29. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1411:20 amSYD - STL
2 stops27h 34mAir Canada
Fri 11/211:35 pmSTL - SYD
2 stops27h 00mAir Canada
Deal found 9/29$1,423
This SmartFares deal was found by Cheapflights users on 10/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1511:20 amSYD - STL
2 stops22h 08mAir Canada
Sat 11/221:35 pmSTL - SYD
2 stops27h 00mAir Canada
Deal found 10/1$1,491
This American Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/212:05 pmSYD - STL
1 stop22h 25mAmerican Airlines
Mon 12/17:00 amSTL - SYD
1 stop31h 25mAmerican Airlines
Deal found 10/2$1,524
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sat 11/1511:50 amSYD - STL
1 stop21h 17mUnited Airlines
Sat 11/226:43 pmSTL - SYD
2 stops43h 17mUnited Airlines
Deal found 10/1$1,617
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Thu 10/3012:10 pmSYD - STL
1 stop20h 17mUnited Airlines
Thu 11/612:31 pmSTL - SYD
2 stops27h 34mUnited Airlines
Deal found 10/2$1,618

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 October 2, 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 10/30

11:45 am-6:47 pm

2 stops23h 02m

Lambert-St Louis

Thu 11/6

8:20 am-10:30 am

2 stops33h 10m

$1,167

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

10:25 am-3:29 pm

2 stops45h 04m

Lambert-St Louis

Mon 3/16

4:30 pm-8:35 am

2 stops24h 05m

$1,356

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 11/21

11:20 am-9:54 pm

2 stops27h 34m

Lambert-St Louis

Mon 12/1

4:05 pm-6:55 am

2 stops45h 50m

$1,398

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 11/21

11:50 am-3:50 pm

1 stop21h 00m

Lambert-St Louis

Mon 12/1

9:00 am-7:00 am

2 stops29h 00m

$1,419

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 11/14

11:20 am-9:54 pm

2 stops27h 34m

Lambert-St Louis

Fri 11/21

1:35 pm-9:35 am

2 stops27h 00m

$1,423

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 11/15

11:20 am-4:28 pm

2 stops22h 08m

Lambert-St Louis

Sat 11/22

1:35 pm-9:35 am

2 stops27h 00m

$1,491

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 11/15

11:50 am-4:07 pm

1 stop21h 17m

Lambert-St Louis

Sat 11/22

6:43 pm-7:00 am

2 stops43h 17m

$1,617

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 1/10

4:00 pm-3:29 pm

2 stops40h 29m

Lambert-St Louis

Sun 6/7

1:30 pm-7:20 am

2 stops50h 50m

$1,625

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 10/30

11:50 am-3:50 pm

1 stop20h 00m

Lambert-St Louis

Thu 11/6

4:35 pm-7:00 am

1 stop21h 25m

$1,626

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 3/12

11:50 am-4:35 pm

1 stop20h 45m

Lambert-St Louis

Mon 3/16

3:15 pm-9:15 am

2 stops26h 00m

$1,657

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Showing 1-10 of 18 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sydney-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, August is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $311). Flying from Sydney to St. Louis in March is currently the most expensive (average of $356). 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 October 2, 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
910 reviews

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me
Qantas Airways
7.5
Good
910 reviews
Qantas Airways
7.5
Good
910 reviews

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me
United Airlines
7.4
Good
8,933 reviews
Qantas Airways
7.5
Good
910 reviews

Boarding

7.7

Entertainment

7.2

Comfort

7.5

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me

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 21h. Fly via Air New Zealand, Air Canada, or United 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, August is the cheapest month in which you can book a flight from Sydney to St. Louis (average of $311). Flying from Sydney to St. Louis in March is currently the most expensive (average of $356). 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

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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 October 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$857Average$1,401FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,110Average$1,789FlexibilityNo cancel feeOn-time74%

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