Find flights
Airlines

$888+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
27 Feb — 6 Mar1
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 22 February 2025.

Return from

$1,612

One-way from

$888

Popular in

August

Cheapest in

March

Average price

$1,979
18/8-8/11
  • 18/8-8/11
  • 4 total stops
  • 72h 01m total
  • Sydney to St. Louis
6/3
  • 6/3
  • 2 total stops
  • 56h 51m total
  • Sydney to St. Charles
Highest demand for flights based on searches. 9% potential increase in price ($360 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease ($148 potential savings vs. average return price).
Average for return flights in February 2025

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 22 February 2025.

Mon 18/809:20SYD - STL
2 stops44h 56mMultiple Airlines
Sat 8/1113:30STL - SYD
2 stops27h 05mMultiple Airlines
Deal found 21/2$1,612
Mon 12/510:20SYD - STL
1 stop21h 49mUnited Airlines
Sat 31/516:32STL - SYD
2 stops47h 28mUnited Airlines
Deal found 22/2$1,725
Mon 12/509:20SYD - STL
2 stops42h 16mAir Canada
Sat 31/513:30STL - SYD
2 stops50h 50mAir Canada
Deal found 21/2$1,735
Fri 11/409:10SYD - STL
1 stop29h 06mQantas Airways
Sun 27/406:15STL - SYD
1 stop33h 50mQantas Airways
Deal found 21/2$2,560
Fri 11/409:10SYD - STL
2 stops23h 13mAmerican Airlines
Sun 27/406:15STL - SYD
1 stop33h 50mAmerican Airlines
Deal found 21/2$2,614

Find flights to St. Charles within your budget

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 22 February 2025.

Fly from

Sydney

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:20-15:16

2 stops44h 56m

Lambert-St Louis

Sat 8/11

13:30-09:35

2 stops27h 05m

$1,612

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

10:20-17:09

1 stop21h 49m

Lambert-St Louis

Sat 31/5

16:32-07:00

2 stops47h 28m

$1,725

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

09:20-12:36

2 stops42h 16m

Lambert-St Louis

Sat 31/5

13:30-07:20

2 stops50h 50m

$1,735

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 11/4

09:10-23:16

1 stop29h 06m

Lambert-St Louis

Sun 27/4

06:15-07:05

1 stop33h 50m

$2,560

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 11/4

09:10-17:23

2 stops23h 13m

Lambert-St Louis

Sun 27/4

06:15-07:05

1 stop33h 50m

$2,614

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/3

17:25-09:16

2 stops56h 51m

$888

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 6/3

11:15-23:03

1 stop28h 48m

$1,418

Flights are sorted by cheapest return flights first.

Deals found on 21/2

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.

Travel insights for flights to St. Charles

Get recent, data-driven insights about flights to St. Charles including ideal travel times, pricing trends, and more.

How long is the flight to St. Charles?

On average, a flight from Sydney to St. Charles takes 21 hours 13 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 cheapest airlines that fly to St. Charles?

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

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 22 February 2025.

Overall

7.4

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

SYD - DFW

They need to improve the check-in kiosks and the in-flight special meals. Never had a smooth boarding process with Qantas. The special meals look like they're prepared at the last minute without much thought.

Overall

7.4

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

SYD - DFW

They need to improve the check-in kiosks and the in-flight special meals. Never had a smooth boarding process with Qantas. The special meals look like they're prepared at the last minute without much thought.

Overall

7.4

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

SYD - DFW

They need to improve the check-in kiosks and the in-flight special meals. Never had a smooth boarding process with Qantas. The special meals look like they're prepared at the last minute without much thought.

Overall

7.4

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

SYD - DFW

They need to improve the check-in kiosks and the in-flight special meals. Never had a smooth boarding process with Qantas. The special meals look like they're prepared at the last minute without much thought.

Overall

7.4

Boarding

7.6

Comfort

7.4

Crew

8.1

Entertainment

7.1

Food

6.9

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

SYD - DFW

They need to improve the check-in kiosks and the in-flight special meals. Never had a smooth boarding process with Qantas. The special meals look like they're prepared at the last minute without much thought.

  • 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, Air Canada 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, Brisbane offers the quickest one-way flight (21 hours 7 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to St. Charles by cabin class

Find flights to St. Charles, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to St. Charles?

Cheapflights helps you search for flights to St. Charles via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to St. Charles?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights to St. Charles for you. Better yet — we are completely free to use.

Can Cheapflights find flights to St. Charles with no change fees?

Certainly. Search results for flights to St. Charles shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights to St. Charles become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to St. Charles today and book when you’re ready!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.