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$1,072+ Cheap flights to St. Charles

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
29 Apr — 6 May1
1 adult

Flights to St. Charles in 2025

Find the latest flights to St. Charles 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 April 2025.

Return from

$1,981

One-way from

$1,072

Popular in

August

Cheapest in

March

Average price

$2,286
Fiji Airways
  • Fiji Airways
  • 5/6-12/6
  • 4 total stops
  • 48h 12m total
  • Sydney to St. Louis
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26/5
  • 26/5
  • 3 total stops
  • 46h 44m total
  • Sydney to St. Charles
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($320 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($141 potential savings vs. average return price).
Search Deals
Average for return flights in April 2025
Search Deals

Find flight deals to St. Charles

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

Thu 5/616:20SYD - STL
2 stops22h 44mMultiple Airlines
Thu 12/619:47STL - SYD
2 stops25h 28mMultiple Airlines
Deal found 23/4$1,981
Mon 18/809:25SYD - STL
2 stops26h 05mDelta
Sat 8/1115:30STL - SYD
2 stops24h 05mDelta
Deal found 23/4$2,039
Thu 5/608:55SYD - STL
2 stops29h 04mJapan Airlines
Thu 12/606:28STL - SYD
2 stops32h 52mJapan Airlines
Deal found 22/4$2,143
Mon 18/810:20SYD - STL
1 stop21h 25mUnited Airlines
Sat 8/1110:30STL - SYD
2 stops27h 30mUnited Airlines
Deal found 23/4$2,170
Sat 7/609:10SYD - STL
1 stop28h 49mQantas Airways
Sat 14/606:28STL - SYD
1 stop34h 02mQantas Airways
Deal found 23/4$2,680
Sat 7/609:10SYD - STL
1 stop28h 49mAmerican Airlines
Sat 14/615:08STL - SYD
2 stops24h 57mAmerican Airlines
Deal found 23/4$2,699
Thu 22/509:20SYD - STL
3 stops49h 38mAir Canada
Thu 29/505:20STL - SYD
2 stops35h 00mAir Canada
Deal found 24/4$2,913

Cheapflights Fare Finder

Locate flights to St. Charles 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 April 2025.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/6

16:20-00:04

2 stops22h 44m

Lambert-St Louis

Thu 12/6

19:47-12:15

2 stops25h 28m

$1,981

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:25-20:30

2 stops26h 05m

Lambert-St Louis

Sat 8/11

15:30-08:35

2 stops24h 05m

$2,039

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 5/6

08:55-22:59

2 stops29h 04m

Lambert-St Louis

Thu 12/6

06:28-06:20

2 stops32h 52m

$2,143

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

10:20-16:45

1 stop21h 25m

Lambert-St Louis

Sat 8/11

08:50-07:00

1 stop29h 10m

$2,170

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 7/6

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 14/6

06:28-07:30

1 stop34h 02m

$2,680

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 7/6

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sat 14/6

15:08-07:05

2 stops24h 57m

$2,699

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 22/5

09:20-19:58

3 stops49h 38m

Lambert-St Louis

Thu 29/5

05:20-07:20

2 stops35h 00m

$2,913

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 26/5

16:20-00:04

3 stops46h 44m

$1,072

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 25/5

08:55-23:04

2 stops29h 09m

$1,327

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 25/5

10:20-18:00

1 stop22h 40m

$1,621

Flights are sorted by cheapest return flights first.

Deals found on 23/4

Best time to book a flight to St. Charles

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

How long is the flight to St. Charles?

On average, a flight from Sydney to St. Charles takes 22 hours 39 minutes. Flights to St. Charles from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to St. Charles?

The most popular airlines flying from Sydney to St. Charles are United Airlines, Qantas Airways and Air Canada.

United Airlines

United Airlines

From $968

Qantas Airways

Qantas Airways

From $1,102

Air Canada

Air Canada

From $984

American Airlines

American Airlines

From $1,096

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

The cheapest airlines flying from Sydney to St. Charles are United Airlines, Air Canada and American Airlines.

Rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Charles ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Charles when rainfall is around 56.0 mm.

Temperature in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Charles, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. 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. Charles. Reviews last updated 24 April 2025.
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very Good
1,453 reviews
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Delta
8.0
Very Good
7,919 reviews
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qantas Airways
7.5
Good
826 reviews
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
United Airlines
7.4
Good
8,685 reviews
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
American Airlines
7.2
Good
10,000 reviews
Japan Airlines
8.3
Very Good
1,453 reviews
Check prices

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

FAQs about flying to St. Charles

  • Can I find cheaper flights to St. Charles 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. Charles on Cheapflights that require 1 or 2 stops for potential cost savings.

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

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to St. Charles.

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

    For those looking to save time traveling to St. Charles, Melbourne offers the quickest one-way flight (21 hours 3 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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