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$1,663+ Cheap flights to St. Louis

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 16/12. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags

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Cheapest flights to St. Louis
Explore the most affordable flight options available to St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 24 October 2025.

Sat 6/1211:20SYD - STL
2 stops22h 08mAir Canada
Sat 13/1209:00STL - SYD
2 stops31h 35mAir Canada
Deal found 22/10$1,756
Sun 7/1211:20SYD - STL
2 stops26h 37mAir Canada
Sun 14/1216:05STL - SYD
2 stops69h 50mAir Canada
Deal found 22/10$1,888
Sat 6/1217:45SYD - STL
1 stop23h 12mMultiple Airlines
Sat 13/1206:55STL - SYD
1 stop33h 05mMultiple Airlines
Deal found 22/10$2,254
Sat 6/1217:45SYD - STL
1 stop23h 12mQantas Airways
Sat 13/1213:20STL - SYD
2 stops25h 40mQantas Airways
Deal found 22/10$2,389
Sun 7/1217:45SYD - STL
1 stop23h 12mMultiple Airlines
Sun 14/1213:55STL - SYD
2 stops25h 05mMultiple Airlines
Deal found 22/10$2,432

Flights to St. Louis in 2025

Find the latest flights to St. Louis in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 24 October 2025.

Return from

$1,756

One-way from

$1,663

Popular in

December

Cheapest in

November

Average price

$1,928
Air Canada
  • Air Canada
  • 6/12-13/12
  • 4 total stops
  • 53h 43m total
  • Sydney to St. Louis
Search Deals
16/12
  • 16/12
  • 1 total stop
  • 19h 27m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 0% potential increase in price.
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($41 potential savings vs. average return price).
Search Deals
Average for return flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Locate flights to St. Louis that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 24 October 2025.
Use the filters below to find and compare flights to St. Louis that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

11:20-16:28

2 stops22h 08m

Lambert-St Louis

Sat 13/12

09:00-09:35

2 stops31h 35m

$1,756

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,771

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:20-23:09

1 stop27h 49m

Lambert-St Louis

Mon 16/3

18:29-07:25

2 stops44h 56m

$1,828

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

17:45-23:57

1 stop23h 12m

Lambert-St Louis

Sat 13/12

06:55-09:00

1 stop33h 05m

$2,254

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

11:20-13:03

2 stops42h 43m

Lambert-St Louis

Sun 7/6

06:30-07:05

1 stop33h 35m

$2,384

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/12

17:45-23:57

1 stop23h 12m

Lambert-St Louis

Sat 13/12

13:20-08:00

2 stops25h 40m

$2,389

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 7/12

17:45-23:57

1 stop23h 12m

Lambert-St Louis

Sun 14/12

13:55-08:00

2 stops25h 05m

$2,432

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

11:50-15:54

1 stop20h 04m

Lambert-St Louis

Mon 16/3

15:00-09:05

2 stops26h 05m

$2,520

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 16/12

14:00-16:27

1 stop19h 27m

$1,663

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 9/3

09:15-23:09

2 stops53h 54m

$2,418

Flights are sorted by cheapest return flights first.

Deals found on 22/10

Showing 1-10 of 14 results
1
2

Best time to book a flight to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis 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 to St. Louis

What are the cheapest airlines that fly to St. Louis?

The cheapest airlines flying from Sydney to St. Louis are United Airlines, Air Canada and Qantas Airways.

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 24 October 2025.
Get a feel of what it's like to fly with Qantas Airways, United Airlines, andAir Canada to the United States by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
922 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

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
922 reviews
Qantas Airways
7.5
Good
922 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

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
8,994 reviews
Qantas Airways
7.5
Good
922 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

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.
Air Canada
7.1
Good
10,351 reviews
Qantas Airways
7.5
Good
922 reviews
Check prices

Comfort

7.5

Entertainment

7.2

Boarding

7.7

Crew

8.2

Food

7.0

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.

FAQs about flying to St. Louis

  • What airport do you fly into for flights to St. Louis?

    If you book a flight to St. Louis, you will be flying into Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis.

  • Can I find cheaper flights to St. Louis if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to St. Louis on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to St. Louis?

    Based on reviews from Cheapflights users, Air Canada is rated the highest out of the airlines that fly to St. Louis.

  • Where does the fastest flight to St. Louis depart from?

    For those looking to save time traveling to St. Louis, Sydney Kingsford Smith offers the quickest one-way flight (22 hours 8 minutes).

  • Does Lambert-St Louis have car hire?

    Yes. Those touching down at Lambert-St Louis can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Lambert-St Louis?

    Yes. Lambert-St Louis has hotels nearby for those requiring accommodations. Hampton Inn St. Louis-Airport is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

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