How long is the flight from Sydney to St. Louis?

There are many flights that can get you from Sydney to St. Louis in 26h 06m. Fly via Air Canada 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 is the cheapest airline to fly from Sydney to St. Louis round-trip?

Our cheapest airline available from Sydney to St. Louis is Qantas Airways. Our recent data shows that you can find tickets from as low as $1,110 on this airline. Users have found that Qantas Airways is 18% cheaper than the other options available to this destination.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest time of day to fly from SYD to STL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sydney to St. Louis as you normally would.

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.

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.

$673+ Flights from Sydney to St. Louis

Q: How much does it cost to fly round-trip from Sydney to St. Louis?

Airfare is below average for this route at the moment. Sydney to St. Louis flights typically cost between $1,293 and $1,402 in February. The cheapest round-trip price found within the last 3 days was $1,175 on Air Canada (Feb 19-Feb 23).

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Find cheap flights from Sydney to St. Louis with Cheapflights

1. Tell us where you want to go

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2. Select your favorite providers

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3. Compare prices and book

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Cheap flight deals from Sydney to St. Louis

Best flights from Sydney to St. Louis
Discover carefully curated flight deals from Sydney to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 2, 2026.

Thu 2/1911:20 amSYD - STL

2 stops26h 06mAir Canada

Mon 2/238:41 amSTL - SYD

2 stops31h 54mAir Canada

Deal found 12/31

$1,176

Sun 2/155:30 pmSYD - STL

2 stops23h 29mMultiple Airlines

Sun 2/224:13 pmSTL - SYD

1 stop21h 42mMultiple Airlines

Deal found 12/31

$1,266

Sun 2/1511:20 amSYD - STL

1 stop29h 39mAmerican Airlines

Sun 2/226:38 amSTL - SYD

1 stop33h 22mAmerican Airlines

Deal found 12/31

$1,356

Thu 2/1911:20 amSYD - STL

1 stop29h 39mQantas Airways

Mon 2/236:18 pmSTL - SYD

2 stops25h 42mQantas Airways

Deal found 12/31

$1,553

Thu 2/1911:50 amSYD - STL

1 stop20h 48mUnited Airlines

Mon 2/234:39 pmSTL - SYD

1 stop21h 21mUnited Airlines

Deal found 12/30

$1,689

Sun 2/1511:20 amSYD - STL

2 stops26h 06mAir Canada

Sun 2/226:00 pmSTL - SYD

2 stops46h 35mAir Canada

Deal found 12/31

$1,181

Thu 2/192:05 pmSYD - STL

1 stop22h 24mAmerican Airlines

Mon 2/2311:46 amSTL - SYD

1 stop26h 09mAmerican Airlines

Deal found 12/31

$1,682

Last-minute flights from Sydney to St. Louis
Discover last-minute flight deals from Sydney to St. Louis. Data last updated January 2, 2026 and is based on user searches.

Sat 1/1010:40 amSYD - STL

2 stops23h 13mDelta

Sun 6/73:42 pmSTL - SYD

2 stops23h 53mDelta

Deal found 1/1

$1,906

Sat 1/102:00 pmSYD - STL

2 stops23h 58mUnited Airlines

Sun 6/77:06 pmSTL - SYD

1 stop20h 49mUnited Airlines

Deal found 1/1

$1,913

Sat 1/104:00 pmSYD - STL

2 stops40h 29mAir Canada

Sun 6/71:00 pmSTL - SYD

3 stops51h 20mAir Canada

Deal found 1/1

$2,354

Sat 1/108:45 amSYD - STL

3 stops28h 06mMultiple Airlines

Sun 6/71:26 pmSTL - SYD

3 stops28h 54mMultiple Airlines

Deal found 1/1

$5,037

One-way flights from Sydney to St. Louis
Search for one-way flight options from Sydney to St. Louis. Find affordable one-way fares based on user searches. Data last updated January 2, 2026.

Wed 1/149:55 pmSYD - STL

2 stops43h 04mQantas Airways

Deal found 1/1

$673

Thu 1/156:05 amSYD - STL

2 stops34h 54mQantas Airways

Deal found 1/1

$690

Fri 1/164:15 pmSYD - STL

2 stops24h 44mQantas Airways

Deal found 1/1

$740

Thu 1/154:00 pmSYD - STL

2 stops41h 55mAir Canada

Deal found 12/31

$756

Thu 1/159:25 pmSYD - STL

3 stops42h 21mMultiple Airlines

Deal found 12/31

$758

Thu 1/1511:20 amSYD - STL

1 stop29h 39mAmerican Airlines

Deal found 1/1

$770

Wed 1/1410:10 pmSYD - STL

2 stops42h 49mMultiple Airlines

Deal found 12/31

$773

Fri 1/169:25 pmSYD - STL

3 stops57h 29mMultiple Airlines

Deal found 1/1

$774

Mon 1/124:00 pmSYD - STL

2 stops40h 29mAir Canada

Deal found 1/1

$775

Find flight deals from Sydney to St. Louis

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$1,175 (Air Canada)
One-way from	$673 (Kiwi.com)
Popular in	May
Cheapest in	August
Average price	$1,336

Provider with most accurate pricing for Sydney Kingsford Smith-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Lambert-St Louis flights.

Search Deals

From Sydney Kingsford Smith to Lambert-St Louis

Search Deals

One-way flight from Sydney Kingsford Smith to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($34 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($26 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

11:20 am-8:26 pm

2 stops26h 06m

Lambert-St Louis

Mon 2/23

8:41 am-9:35 am

2 stops31h 54m

$1,176

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 2/15

11:20 am-8:26 pm

2 stops26h 06m

Lambert-St Louis

Sun 2/22

6:00 pm-9:35 am

2 stops46h 35m

$1,181

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 2/15

5:30 pm-11:59 pm

2 stops23h 29m

Lambert-St Louis

Sun 2/22

4:13 pm-6:55 am

1 stop21h 42m

$1,266

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 2/15

11:20 am-11:59 pm

1 stop29h 39m

Lambert-St Louis

Sun 2/22

6:38 am-9:00 am

1 stop33h 22m

$1,356

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

11:20 am-11:59 pm

1 stop29h 39m

Lambert-St Louis

Mon 2/23

6:18 pm-1:00 pm

2 stops25h 42m

$1,553

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

2:05 pm-7:29 pm

1 stop22h 24m

Lambert-St Louis

Mon 2/23

11:46 am-6:55 am

1 stop26h 09m

$1,682

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 2/19

11:50 am-3:38 pm

1 stop20h 48m

Lambert-St Louis

Mon 2/23

4:39 pm-7:00 am

1 stop21h 21m

$1,689

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 1/14

9:55 pm-11:59 pm

2 stops43h 04m

$673

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 1/15

6:05 am-11:59 pm

2 stops34h 54m

$690

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 1/16

4:15 pm-11:59 pm

2 stops24h 44m

$740

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/1

Showing 1-10 of 15 results

Compare providers for flights from Sydney to St. Louis

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 January.

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star

*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 $1,346). 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

Read reviews from past customers who have flown Qantas Airways 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

961 reviews

Reviews

1 / 20

6.0

Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

Qantas Airways

7.5

Good

961 reviews

Qantas Airways

7.5

Good

961 reviews

Reviews

1 / 20

6.0

Good

Marco,Dec 2025

BOS - LAX

There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.

Related info for your journey

How long is the flight from Sydney to St. Louis?
There are many flights that can get you from Sydney to St. Louis in 26h 06m. Fly via Air Canada 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 is the cheapest airline to fly from Sydney to St. Louis round-trip?
Our cheapest airline available from Sydney to St. Louis is Qantas Airways. Our recent data shows that you can find tickets from as low as $1,110 on this airline. Users have found that Qantas Airways is 18% 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 $1,346). 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

Edwardsville

O'Fallon

Swansea

Fairview Heights

Maryland Heights

Collinsville

Eureka

Glencoe

Chesterfield

Alton

Farmington

Festus

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Top airline flying from Sydney to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$1,110	Average$1,789	FlexibilityNo cancel fee	On-time74%

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$673+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Sydney to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Sydney to St. Louis

Best flights from Sydney to St. LouisDiscover carefully curated flight deals from Sydney to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 2, 2026.

Discover carefully curated flight deals from Sydney to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 2, 2026.

Find flight deals from Sydney to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sydney to St. Louis that are best for you.

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 January.

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.

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?

How much does it cost to fly round-trip from Sydney to St. Louis?

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Qantas Airways 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.

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?

What is the cheapest airline to fly from Sydney to St. Louis round-trip?

Can I find deals for flights from Sydney to St. Louis that include hotel bookings?

How can I find direct flights from Sydney to St. Louis?

Can I find deals for business class flights from Sydney to St. Louis?

What is the cheapest month to book a flight from Sydney to St. Louis?

Traveling to a place near St. Louis?

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 airline flying from Sydney to St. Louis

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Best flights from Sydney to St. Louis
Discover carefully curated flight deals from Sydney to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 2, 2026.