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, Sydney Kingsford Smith offers the quickest one-way flight (22 hours 1 minute).

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).

$770+ Flights to St. Charles

Flights to St. Charles in 2025

Return from	$1,207
Popular in	December
Cheapest in	November
Average price	$2,154

Air Canada
15/10-21/10
4 total stops
53h 06m total
Sydney to St. Louis

Search Deals

Highest demand for flights based on searches. 0% potential increase in price ($29 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($53 potential savings vs. average return price).

Search Deals

Average for return flights in August 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 1 August 2025.

Wed 30/709:20SYD - STL

2 stops29h 39mAir Canada

Sun 3/816:00STL - SYD

2 stops48h 20mAir Canada

Deal found 29/7$1,214

Mon 18/809:10SYD - STL

2 stops24h 59mAmerican Airlines

Sat 8/1115:59STL - SYD

2 stops24h 01mAmerican Airlines

Deal found 31/7$1,263

Sun 14/909:30SYD - STL

2 stops24h 28mUnited Airlines

Sun 21/911:05STL - SYD

2 stops28h 50mUnited Airlines

Deal found 30/7$1,288

Mon 13/1010:10SYD - STL

1 stop28h 55mQantas Airways

Sun 14/1206:25STL - SYD

1 stop32h 00mQantas Airways

Deal found 29/7$1,678

Wed 30/709:20SYD - STL

2 stops22h 11mMultiple Airlines

Sun 3/806:14STL - SYD

1 stop34h 16mMultiple Airlines

Deal found 29/7$1,960

Tue 14/1021:40SYD - STL

2 stops42h 23mAlaska Airlines

Fri 19/1216:10STL - SYD

2 stops58h 35mAlaska Airlines

Deal found 29/7$2,572

Best flights to St. Charles
Discover carefully curated flight deals to St. Charles that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 August 2025.

Mon 18/809:10SYD - STL

2 stops24h 59mAmerican Airlines

Sat 8/1115:59STL - SYD

2 stops24h 01mAmerican Airlines

Deal found 31/7$1,263

Sun 14/910:20SYD - STL

1 stop21h 33mUnited Airlines

Sun 21/911:05STL - SYD

2 stops28h 50mUnited Airlines

Deal found 30/7$1,288

Fri 12/909:20SYD - STL

3 stops49h 37mAir Canada

Fri 19/913:30STL - SYD

2 stops50h 50mAir Canada

Deal found 28/7$1,370

Mon 13/1010:10SYD - STL

1 stop28h 55mQantas Airways

Sun 14/1206:25STL - SYD

1 stop32h 00mQantas Airways

Deal found 29/7$1,678

Mon 18/812:10SYD - STL

2 stops21h 59mMultiple Airlines

Sat 8/1115:59STL - SYD

3 stops27h 31mMultiple Airlines

Deal found 31/7$2,423

Tue 14/1021:40SYD - STL

2 stops42h 23mAlaska Airlines

Fri 19/1216:10STL - SYD

2 stops58h 35mAlaska Airlines

Deal found 29/7$2,572

Fri 17/1010:30SYD - STL

2 stops27h 30mVirgin Australia

Mon 15/1206:15STL - SYD

1 stop31h 45mVirgin Australia

Deal found 29/7$2,586

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated 1 August 2025 and is based on user searches.

Mon 4/809:10SYD - STL

1 stop29h 20mQantas Airways

Mon 11/817:52STL - SYD

1 stop22h 03mQantas Airways

Deal found 31/7$8,854

Mon 4/811:50SYD - STL

3 stops35h 32mLATAM Airlines

Mon 11/817:11STL - SYD

3 stops49h 24mLATAM Airlines

Deal found 31/7$19,708

Mon 18/809:10SYD - STL

2 stops24h 59mAmerican Airlines

Sat 8/1115:59STL - SYD

2 stops24h 01mAmerican Airlines

Deal found 31/7$1,263

Mon 18/810:20SYD - STL

1 stop21h 25mUnited Airlines

Sat 8/1111:20STL - SYD

1 stop26h 40mUnited Airlines

Deal found 31/7$1,288

Mon 18/812:10SYD - STL

2 stops21h 59mMultiple Airlines

Sat 8/1115:59STL - SYD

3 stops27h 31mMultiple Airlines

Deal found 31/7$2,423

Fly from

Route

Depart

Return

Price

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

09:10-19:09

2 stops24h 59m

Lambert-St Louis

Sat 8/11

15:59-09:00

2 stops24h 01m

$1,263

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 14/9

10:20-16:53

1 stop21h 33m

Lambert-St Louis

Sun 21/9

11:05-06:55

2 stops28h 50m

$1,288

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 12/9

09:20-19:57

3 stops49h 37m

Lambert-St Louis

Fri 19/9

13:30-07:20

2 stops50h 50m

$1,370

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 13/10

10:10-23:05

1 stop28h 55m

Lambert-St Louis

Sun 14/12

06:25-07:25

1 stop32h 00m

$1,678

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

12:10-19:09

2 stops21h 59m

Lambert-St Louis

Sat 8/11

15:59-12:30

3 stops27h 31m

$2,423

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 14/10

21:40-00:03

2 stops42h 23m

Lambert-St Louis

Fri 19/12

16:10-19:45

2 stops58h 35m

$2,572

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 17/10

10:30-22:00

2 stops27h 30m

Lambert-St Louis

Mon 15/12

06:15-07:00

1 stop31h 45m

$2,586

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 4/8

09:10-23:30

1 stop29h 20m

$770

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 4/8

09:25-18:06

2 stops23h 41m

$771

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 4/8

17:45-18:35

3 stops39h 50m

$1,793

Flights are sorted by cheapest return flights first.

Deals found on 31/7

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 1 minute. 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.

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 Qantas Airways.

Rainfall in St. Charles 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

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 a feel of what it's like to fly with Qantas Airways, United Airlines, andAmerican Airlines to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Qantas Airways

7.5

Good

887 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

Qantas Airways

7.5

Good

887 reviews

Qantas Airways

7.5

Good

887 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

United Airlines

7.4

Good

8,900 reviews

Qantas Airways

7.5

Good

887 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

American Airlines

7.2

Good

10,000 reviews

Qantas Airways

7.5

Good

887 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

Air Canada

7.1

Good

9,851 reviews

Qantas Airways

7.5

Good

887 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,July 2025

MEL - SYD

Flight cancelled 2hours before take off after checking in. Booked by airline on flight 6 hours later. No compensation or vouchers till we asked just before the flight took off.

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, Sydney Kingsford Smith offers the quickest one-way flight (22 hours 1 minute).
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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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!

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$770+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.

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 1 August 2025.

Return from

Popular in

Cheapest in

Average price

Find flight deals to St. Charles

Cheapest flights to St. CharlesExplore the most affordable flight options available to St. Charles. Find the lowest fares based on data from user searches, with prices last updated on 1 August 2025.

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 1 August 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight to St. Charles

How long is the flight to St. Charles?

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

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

Rainfall in St. Charles by month

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

Temperature in St. Charles by month

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

Reviews of airlines servicing St. Charles

Get a feel of what it's like to fly with Qantas Airways, United Airlines, andAmerican Airlines to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

FAQs about flying to St. Charles

Can I find cheaper flights to St. Charles if I am willing to have stopovers?

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

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

Does Lambert-St Louis have car hire?

Are there hotels close to Lambert-St Louis?

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?

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

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

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

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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 1 August 2025.