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$978+ 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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
14 Dec — 21 Dec1
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 14 November 2025.

Sat 27/1214:15SYD - STL
2 stops35h 43mDelta
Sat 3/107:00STL - SYD
2 stops30h 50mDelta
Deal found 12/11$2,327
Sat 27/1212:10SYD - STL
2 stops22h 44mUnited Airlines
Sat 3/118:35STL - SYD
2 stops43h 25mUnited Airlines
Deal found 12/11$2,438
Sat 27/1208:00SYD - STL
3 stops28h 26mMultiple Airlines
Sat 3/111:41STL - SYD
2 stops27h 54mMultiple Airlines
Deal found 12/11$4,343

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 14 November 2025.

Return from

$1,729

One-way from

$978

Popular in

May

Cheapest in

November

Average price

$1,573
Air Canada
  • Air Canada
  • 12/3-16/3
  • 4 total stops
  • 70h 39m total
  • Sydney to St. Louis
Search Deals
Air New Zealand
  • Air New Zealand
  • 15/4
  • 2 total stops
  • 36h 07m total
  • Sydney to St. Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($80 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
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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 14 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

Thu 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

09:00-08:35

2 stops31h 35m

$1,734

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

10:20-18:22

1 stop23h 02m

Lambert-St Louis

Sun 17/5

05:20-06:55

2 stops34h 35m

$1,851

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/1

10:40-21:35

2 stops27h 55m

Lambert-St Louis

Mon 26/1

17:00-08:30

2 stops22h 30m

$2,028

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 8/1

10:40-08:53

2 stops39h 13m

Lambert-St Louis

Sun 1/2

09:59-08:30

2 stops29h 31m

$2,028

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

06:30-14:02

2 stops23h 32m

Lambert-St Louis

Mon 16/3

06:30-09:00

1 stop34h 30m

$2,178

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 11/1

11:50-22:00

1 stop27h 10m

Lambert-St Louis

Tue 27/1

11:20-06:20

2 stops26h 00m

$2,367

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 11/1

11:50-22:00

1 stop27h 10m

Lambert-St Louis

Sat 31/1

16:15-06:20

2 stops45h 05m

$2,367

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 11/1

11:50-22:00

1 stop27h 10m

Lambert-St Louis

Mon 26/1

17:00-09:15

1 stop23h 15m

$2,367

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 10/1

17:45-23:59

1 stop23h 14m

Lambert-St Louis

Sun 7/6

12:09-07:05

2 stops27h 56m

$2,390

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 15/4

08:45-05:52

2 stops36h 07m

$978

Flights are sorted by cheapest return flights first.

Deals found on 11/11

Showing 1-10 of 17 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 14 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
934 reviews
Check prices

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

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
934 reviews
Qantas Airways
7.5
Good
934 reviews
Check prices

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

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
9,016 reviews
Qantas Airways
7.5
Good
934 reviews
Check prices

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

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
10,444 reviews
Qantas Airways
7.5
Good
934 reviews
Check prices

Comfort

7.5

Crew

8.2

Food

7.0

Boarding

7.7

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.

  • 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 (20 hours 2 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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