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$763+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
17 Oct — 24 Oct1
1 adult
1 adult, Economy

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 17 September 2025.

Return from

$1,212

One-way from

$763

Popular in

January

Cheapest in

November

Average price

$2,044
Air Canada
  • Air Canada
  • 12/3-16/3
  • 4 total stops
  • 93h 39m total
  • Sydney to St. Louis
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United Airlines
  • United Airlines
  • 7/3
  • 1 total stop
  • 37h 52m total
  • Sydney to St. Louis
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Highest demand for flights based on searches. 13% potential increase in price ($503 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($53 potential savings vs. average return price).
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Average for return flights in September 2025
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Find flight deals to St. Louis

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 17 September 2025.

Thu 4/1216:00SYD - STL
2 stops64h 29mAir Canada
Thu 11/1213:35STL - SYD
2 stops24h 20mAir Canada
Deal found 15/9$1,244
Wed 3/1211:20SYD - STL
2 stops28h 02mAmerican Airlines
Fri 12/1206:55STL - SYD
1 stop33h 05mAmerican Airlines
Deal found 15/9$1,248
Thu 4/1211:20SYD - STL
2 stops26h 37mAir Canada
Mon 8/1216:05STL - SYD
2 stops45h 50mAir Canada
Deal found 15/9$1,253
Thu 30/1011:20SYD - STL
2 stops22h 18mAmerican Airlines
Thu 6/1114:29STL - SYD
2 stops25h 31mAmerican Airlines
Deal found 15/9$1,266
Mon 1/1211:50SYD - STL
1 stop39h 14mUnited Airlines
Tue 9/1216:45STL - SYD
1 stop21h 15mUnited Airlines
Deal found 15/9$1,274
Wed 3/1210:40SYD - STL
2 stops38h 45mDelta
Tue 9/1218:06STL - SYD
2 stops69h 24mDelta
Deal found 15/9$1,275
Fri 31/1011:50SYD - STL
1 stop20h 00mUnited Airlines
Fri 7/1116:43STL - SYD
2 stops47h 32mUnited Airlines
Deal found 16/9$1,277
Thu 4/1216:00SYD - STL
2 stops64h 29mAir Canada
Sat 13/1209:00STL - SYD
2 stops28h 55mAir Canada
Deal found 15/9$1,344
Mon 1/1211:20SYD - STL
2 stops28h 09mAmerican Airlines
Fri 12/1206:55STL - SYD
1 stop33h 05mAmerican Airlines
Deal found 15/9$1,349
Wed 3/1211:20SYD - STL
2 stops22h 08mUnited Airlines
Sun 7/1217:30STL - SYD
1 stop22h 45mUnited Airlines
Deal found 15/9$1,434
Sun 30/1114:05SYD - STL
1 stop22h 25mAmerican Airlines
Sun 7/1206:55STL - SYD
1 stop33h 05mAmerican Airlines
Deal found 15/9$1,449

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 17 September 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

10:20-15:29

2 stops45h 09m

Lambert-St Louis

Mon 16/3

16:05-08:35

2 stops48h 30m

$1,212

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 4/12

11:20-20:57

2 stops26h 37m

Lambert-St Louis

Mon 8/12

16:05-06:55

2 stops45h 50m

$1,253

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/12

11:50-22:22

1 stop27h 32m

Lambert-St Louis

Mon 8/12

15:19-09:05

2 stops24h 46m

$1,274

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 1/12

11:50-10:04

1 stop39h 14m

Lambert-St Louis

Tue 9/12

16:45-09:05

2 stops23h 20m

$1,274

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/12

12:10-16:27

1 stop21h 17m

Lambert-St Louis

Tue 9/12

17:30-09:15

1 stop22h 45m

$1,274

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/12

10:40-08:25

2 stops38h 45m

Lambert-St Louis

Tue 9/12

18:06-08:30

2 stops69h 24m

$1,275

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 3/12

11:50-22:45

2 stops27h 55m

Lambert-St Louis

Wed 10/12

09:00-09:15

2 stops31h 15m

$1,275

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 2/12

12:10-22:45

2 stops27h 35m

Lambert-St Louis

Mon 8/12

15:19-09:05

3 stops48h 46m

$1,275

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 31/10

11:05-16:28

2 stops21h 23m

Lambert-St Louis

Fri 7/11

16:43-07:00

2 stops45h 17m

$1,277

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 7/3

10:40-19:14

2 stops25h 34m

$763

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 15 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 17 September 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
907 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
907 reviews
Qantas Airways
7.5
Good
907 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
8,924 reviews
Qantas Airways
7.5
Good
907 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
Air Canada
7.1
Good
10,000 reviews
Qantas Airways
7.5
Good
907 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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

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 $273, while return flights cost around $443.

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

    A return flight to St. Louis will typically cost around $376, however they can be found for as little as $296.

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

    For those looking to save time traveling to St. Louis, Melbourne offers the quickest one-way flight (23 hours 16 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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