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$1,224+ 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
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals to St. Louis

Enter your travel dates to find the best prices.

Best flights to St. Louis
Discover carefully curated flight deals to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 November 2025.

Tue 7/417:50SYD - STL
1 stop20h 26mQantas Airways
Sat 18/416:09STL - SYD
1 stop23h 46mQantas Airways
Deal found 26/11$1,816
Tue 7/412:00SYD - STL
1 stop19h 11mMultiple Airlines
Sat 18/416:09STL - SYD
2 stops24h 21mMultiple Airlines
Deal found 26/11$1,871
Sat 14/214:05SYD - STL
1 stop22h 14mAmerican Airlines
Wed 18/206:30STL - SYD
1 stop31h 55mAmerican Airlines
Deal found 24/11$2,577
Sat 14/211:50SYD - STL
1 stop20h 48mUnited Airlines
Wed 18/216:39STL - SYD
1 stop21h 21mUnited Airlines
Deal found 25/11$2,583
Sat 14/211:20SYD - STL
1 stop29h 28mQantas Airways
Wed 18/211:46STL - SYD
2 stops30h 09mQantas Airways
Deal found 24/11$2,337
Sat 10/114:00SYD - STL
2 stops36h 22mUnited Airlines
Sun 7/615:15STL - SYD
2 stops24h 40mUnited Airlines
Deal found 25/11$2,697
Thu 8/117:30SYD - STL
2 stops38h 17mQantas Airways
Thu 29/117:04STL - SYD
2 stops26h 11mQantas Airways
Deal found 25/11$2,797
Thu 8/114:00SYD - STL
2 stops40h 16mUnited Airlines
Thu 29/106:00STL - SYD
1 stop32h 00mUnited Airlines
Deal found 25/11$2,838

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 27 November 2025.

Return from

$1,399

One-way from

$1,224

Popular in

May

Cheapest in

November

Average price

$1,585
Air Canada
  • Air Canada
  • 14/2-18/2
  • 4 total stops
  • 77h 03m total
  • Sydney to St. Louis
Search Deals
Qantas Airways
  • Qantas Airways
  • 16/12
  • 2 total stops
  • 33h 57m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($76 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($42 potential savings vs. average return price).
Search Deals
Average for return flights in November 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 27 November 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

Tue 7/4

17:50-23:16

1 stop20h 26m

Lambert-St Louis

Sat 18/4

16:09-06:55

1 stop23h 46m

$1,816

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 7/4

12:00-16:11

1 stop19h 11m

Lambert-St Louis

Sat 18/4

16:09-07:30

2 stops24h 21m

$1,871

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 14/2

11:20-23:48

1 stop29h 28m

Lambert-St Louis

Wed 18/2

11:46-10:55

2 stops30h 09m

$2,337

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 14/2

14:05-19:19

1 stop22h 14m

Lambert-St Louis

Wed 18/2

06:30-07:25

1 stop31h 55m

$2,577

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 14/2

11:50-15:38

1 stop20h 48m

Lambert-St Louis

Wed 18/2

16:39-07:00

1 stop21h 21m

$2,583

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

14:00-09:22

2 stops36h 22m

Lambert-St Louis

Sun 7/6

15:15-06:55

2 stops24h 40m

$2,697

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/1

17:30-14:47

2 stops38h 17m

Lambert-St Louis

Thu 29/1

17:04-12:15

2 stops26h 11m

$2,797

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/1

14:00-13:16

2 stops40h 16m

Lambert-St Louis

Thu 29/1

06:00-07:00

1 stop32h 00m

$2,838

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 16/12

07:00-23:57

2 stops33h 57m

$1,224

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 16/12

14:00-16:27

1 stop19h 27m

$1,664

Flights are sorted by cheapest return flights first.

Deals found on 25/11

Showing 1-10 of 11 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 27 November 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
946 reviews
Check prices

Food

7.0

Boarding

7.7

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
946 reviews
Qantas Airways
7.5
Good
946 reviews
Check prices

Food

7.0

Boarding

7.7

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
9,047 reviews
Qantas Airways
7.5
Good
946 reviews
Check prices

Food

7.0

Boarding

7.7

Comfort

7.5

Crew

8.1

Entertainment

7.2

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
10,481 reviews
Qantas Airways
7.5
Good
946 reviews
Check prices

Food

7.0

Boarding

7.7

Comfort

7.5

Crew

8.1

Entertainment

7.2

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.

  • What is the cheapest airport to fly to in St. Louis?

    Lambert-St Louis is currently the cheapest airport to fly to in St. Louis. One-way flights to Lambert-St Louis typically cost $182, while return flights cost around $363.

  • How much is a return flight to St. Louis?

    A return flight to St. Louis will typically cost around $644, however they can be found for as little as $363.

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

    For those looking to save time traveling to St. Louis, Brisbane offers the quickest one-way flight (23 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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Certainly. Search results for flights to St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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