What is the cheapest month to fly to St. Charles?

Currently, August is the cheapest month in which you can book a flight to St. Charles . Flying to St. Charles in March will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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

Yes, flights with layovers 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, Frontier is rated the highest out of the airlines that fly to St. Charles.

How much is a round-trip flight to St. Charles?

A round-trip flight to St. Charles will typically cost around $250, however they can be found for as little as $84.

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

For those looking to save time traveling to St. Charles, Kansas City offers the quickest one-way flight (1 hour 0 minutes).

Does Lambert-St Louis have rental cars?

Yes. Those touching down at Lambert-St Louis can take advantage of the rental car 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 mi away from Lambert-St Louis).

$71+ Flights to St. Charles

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Flights to St. Charles in 2025

Popular in	December
Cheapest in	January
Average price	$357
Round-trip from	$209
One-way from	$71

Highest demand for flights based on searches. 9% potential increase in price ($36 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

From New York to Lambert-St Louis

Search Deals

One-way flight from New York to St. Charles

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 September 15, 2025.

Sat 9/2710:56 pmLGA - STL

1 stop11h 10mFrontier

Tue 9/307:55 pmSTL - LGA

1 stop25h 16mFrontier

Deal found 9/15$209

Wed 10/16:59 amJFK - STL

1 stop31h 54mFrontier

Mon 10/64:00 pmSTL - JFK

1 stop8h 08mFrontier

Deal found 9/13$209

Mon 9/156:30 amLGA - STL

1 stop9h 34mFrontier

Mon 9/224:00 pmSTL - LGA

1 stop6h 57mFrontier

Deal found 9/14$210

Sat 10/46:59 amJFK - STL

1 stop10h 04mFrontier

Tue 10/77:52 pmSTL - JFK

1 stop15h 09mFrontier

Deal found 9/13$210

Sun 10/56:30 amLGA - STL

1 stop9h 34mFrontier

Tue 10/77:52 pmSTL - LGA

2 stops13h 38mFrontier

Deal found 9/14$212

Wed 10/16:59 amJFK - STL

1 stop31h 54mFrontier

Sun 10/51:57 pmSTL - JFK

1 stop19h 29mFrontier

Deal found 9/13$212

Mon 9/296:30 amLGA - STL

1 stop9h 34mFrontier

Wed 10/17:55 pmSTL - LGA

2 stops27h 02mFrontier

Deal found 9/13$213

Thu 10/26:15 amJFK - STL

1 stop9h 49mFrontier

Tue 10/77:52 pmSTL - JFK

1 stop15h 09mFrontier

Deal found 9/13$213

Wed 10/295:30 pmLGA - STL

1 stop17h 42mFrontier

Sat 11/18:40 pmSTL - LGA

2 stops14h 49mFrontier

Deal found 9/13$214

Sun 10/56:15 amJFK - STL

1 stop9h 49mFrontier

Mon 10/64:00 pmSTL - JFK

2 stops17h 24mFrontier

Deal found 9/15$215

Wed 10/17:22 amJFK - STL

1 stop6h 58mDelta

Tue 10/76:14 pmSTL - JFK

1 stop4h 04mDelta

Deal found 9/13$216

Sat 11/810:25 amLGA - STL

1 stop7h 30mSouthwest

Sun 11/96:40 amSTL - LGA

1 stop4h 15mSouthwest

Deal found 9/14$217

Best flights to St. Charles
Discover carefully curated flight deals to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Thu 11/206:30 pmLGA - STL

Nonstop2h 50mSouthwest

Tue 12/27:55 pmSTL - LGA

Nonstop2h 15mSouthwest

Deal found 9/14$219

Thu 10/162:55 pmJFK - STL

Nonstop2h 48mDelta

Sat 10/184:13 pmSTL - JFK

Nonstop2h 47mDelta

Deal found 9/12$225

Wed 10/1510:00 pmEWR - STL

Nonstop2h 57mUnited Airlines

Wed 10/226:00 amSTL - EWR

Nonstop2h 39mUnited Airlines

Deal found 9/15$241

Sun 9/2811:43 amSWF - STL

1 stop26h 19mMultiple Airlines

Thu 10/210:35 amSTL - SWF

1 stop23h 46mMultiple Airlines

Deal found 9/13$265

Thu 11/132:40 pmJFK - STL

Nonstop2h 53mDelta

Sun 11/166:40 amSTL - JFK

1 stop4h 19mDelta

Deal found 9/13$237

Sat 10/258:25 amLGA - STL

Nonstop2h 50mSouthwest

Sat 10/256:05 pmSTL - LGA

Nonstop2h 20mSouthwest

Deal found 9/14$241

Fri 10/2410:00 pmEWR - STL

Nonstop2h 57mUnited Airlines

Mon 10/275:24 pmSTL - EWR

1 stop4h 45mUnited Airlines

Deal found 9/14$251

Fri 11/142:40 pmJFK - STL

Nonstop2h 53mDelta

Mon 11/176:09 pmSTL - JFK

1 stop3h 59mDelta

Deal found 9/15$237

Wed 10/153:35 pmLGA - STL

Nonstop2h 55mSouthwest

Wed 10/227:50 pmSTL - LGA

Nonstop2h 20mSouthwest

Deal found 9/15$241

Mon 10/612:24 pmSWF - STL

2 stops9h 13mMultiple Airlines

Thu 10/910:57 amSTL - SWF

1 stop22h 54mMultiple Airlines

Deal found 9/13$272

Tue 2/245:15 pmLGA - STL

1 stop4h 45mUnited Airlines

Sat 2/287:41 amSTL - LGA

1 stop6h 37mUnited Airlines

Deal found 9/12$257

Thu 11/62:55 pmJFK - STL

Nonstop2h 48mDelta

Mon 11/106:09 pmSTL - JFK

1 stop3h 59mDelta

Deal found 9/14$237

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated September 15, 2025 and is based on user searches.

Mon 9/156:30 amLGA - STL

1 stop9h 34mFrontier

Mon 9/224:00 pmSTL - LGA

1 stop6h 57mFrontier

Deal found 9/14$210

Sat 9/2710:56 pmLGA - STL

1 stop11h 10mFrontier

Tue 9/307:55 pmSTL - LGA

1 stop25h 16mFrontier

Deal found 9/15$209

Mon 9/296:30 amLGA - STL

1 stop9h 34mFrontier

Wed 10/17:55 pmSTL - LGA

2 stops27h 02mFrontier

Deal found 9/13$213

Wed 10/16:59 amJFK - STL

1 stop31h 54mFrontier

Thu 10/24:00 pmSTL - JFK

1 stop8h 08mFrontier

Deal found 9/13$209

Wed 10/16:59 amJFK - STL

1 stop31h 54mFrontier

Sun 10/51:57 pmSTL - JFK

1 stop19h 29mFrontier

Deal found 9/13$212

Wed 10/17:22 amJFK - STL

1 stop6h 58mDelta

Tue 10/76:14 pmSTL - JFK

1 stop4h 04mDelta

Deal found 9/13$216

Thu 10/26:15 amJFK - STL

1 stop9h 49mFrontier

Tue 10/77:52 pmSTL - JFK

1 stop15h 09mFrontier

Deal found 9/13$213

Sat 10/46:59 amJFK - STL

1 stop10h 04mFrontier

Tue 10/77:52 pmSTL - JFK

1 stop15h 09mFrontier

Deal found 9/13$210

Sun 10/56:30 amLGA - STL

1 stop9h 34mFrontier

Tue 10/77:52 pmSTL - LGA

2 stops13h 38mFrontier

Deal found 9/14$212

Sun 10/56:15 amJFK - STL

1 stop9h 49mFrontier

Mon 10/64:00 pmSTL - JFK

2 stops17h 24mFrontier

Deal found 9/15$215

Wed 10/295:30 pmLGA - STL

1 stop17h 42mFrontier

Sat 11/18:40 pmSTL - LGA

2 stops14h 49mFrontier

Deal found 9/13$214

Thu 10/307:30 amJFK - STL

1 stop6h 47mFrontier

Thu 11/67:45 pmSTL - JFK

1 stop18h 15mFrontier

Deal found 9/15$211

One-way flights to St. Charles
Search for one-way flight options to St. Charles. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Thu 10/235:54 amEWR - STL

1 stop5h 43mFrontier

Deal found 9/14$71

Fri 10/3111:26 amEWR - STL

1 stop5h 31mFrontier

Deal found 9/13$72

Thu 9/255:55 amEWR - STL

1 stop10h 09mFrontier

Deal found 9/13$77

Sun 10/55:55 amEWR - STL

1 stop10h 09mFrontier

Deal found 9/13$78

Fri 10/315:15 amEWR - STL

1 stop11h 42mMultiple Airlines

Deal found 9/12$79

Sat 10/1810:05 amEWR - STL

1 stop9h 05mSpirit Airlines

Deal found 9/13$81

Sat 10/49:59 amEWR - STL

Nonstop2h 48mUnited Airlines

Deal found 9/12$86

Wed 11/56:00 amEWR - STL

1 stop29h 12mFrontier

Deal found 9/13$87

Wed 10/2211:26 amEWR - STL

1 stop24h 11mFrontier

Deal found 9/13$88

Sun 9/285:55 amEWR - STL

1 stop10h 09mFrontier

Deal found 9/14$89

Sat 10/256:20 amEWR - STL

1 stop12h 50mSpirit Airlines

Deal found 9/13$92

Sun 10/195:54 amEWR - STL

1 stop5h 43mFrontier

Deal found 9/14$93

Fly from

Route

Depart

Return

Price

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Thu 11/20

6:30 pm-8:20 pm

Nonstop2h 50m

Lambert-St Louis

Tue 12/2

7:55 pm-11:10 pm

Nonstop2h 15m

$219

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Thu 10/16

2:55 pm-4:43 pm

Nonstop2h 48m

Lambert-St Louis

Sat 10/18

4:13 pm-8:00 pm

Nonstop2h 47m

$225

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Thu 11/13

2:40 pm-4:33 pm

Nonstop2h 53m

Lambert-St Louis

Sun 11/16

6:40 am-11:59 am

1 stop4h 19m

$237

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Fri 11/14

2:40 pm-4:33 pm

Nonstop2h 53m

Lambert-St Louis

Mon 11/17

6:09 pm-11:08 pm

1 stop3h 59m

$237

New YorkSt. Louis

JFK - STL

JFKSTL

New York John F Kennedy Intl

Thu 11/6

2:55 pm-4:43 pm

Nonstop2h 48m

Lambert-St Louis

Mon 11/10

6:09 pm-11:08 pm

1 stop3h 59m

$237

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Thu 10/30

8:05 am-12:35 pm

1 stop5h 30m

Lambert-St Louis

Mon 11/3

5:15 pm-11:06 pm

1 stop4h 51m

$239

NewarkSt. Louis

EWR - STL

EWRSTL

Newark

Wed 10/15

10:00 pm-11:57 pm

Nonstop2h 57m

Lambert-St Louis

Wed 10/22

6:00 am-9:39 am

Nonstop2h 39m

$241

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Sat 10/25

8:25 am-10:15 am

Nonstop2h 50m

Lambert-St Louis

Sat 10/25

6:05 pm-9:25 pm

Nonstop2h 20m

$241

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Wed 10/15

3:35 pm-5:30 pm

Nonstop2h 55m

Lambert-St Louis

Wed 10/22

7:50 pm-11:10 pm

Nonstop2h 20m

$241

New YorkSt. Louis

LGA - STL

LGASTL

New York LaGuardia

Tue 2/24

6:55 pm-8:57 pm

Nonstop3h 02m

Lambert-St Louis

Sat 2/28

6:00 am-9:29 am

Nonstop2h 29m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 60 results

...

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 round-trip 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

When is the best time to book a flight to St. Charles?

The best time to book flights to St. Charles is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

How long is the flight to St. Charles?

On average, a flight from New York to St. Charles takes 4 hours 19 minutes. Flights to St. Charles from other popular cities in USA will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly to St. Charles?

Users looking for the lowest fares to St. Charles should consider flying on Wednesday mornings, when prices are typically cheapest. Budget-minded travelers will want to avoid Sunday evenings, when prices are usually at their highest.

Weekly flight availability to St. Charles

The most flights from New York to St. Charles are scheduled on a Monday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

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

The most popular airlines flying from New York to St. Charles are United Airlines, Delta and American Airlines.

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

The cheapest airlines flying from New York to St. Charles are Frontier, Spirit Airlines and Delta.

Rainfall in St. Charles by month

In terms of precipitation, rainfall in St. Charles ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Charles when rainfall is around 2.2 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Charles

Read reviews from past customers who have flown Southwest, Delta, and United Airlines to the United States. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,242 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Delta

8.0

Very good

7,954 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

8,929 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Frontier

5.8

Fair

3,172 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

FAQs about flying to St. Charles

Can I find cheaper flights to St. Charles if I am willing to have layovers?
Yes, flights with layovers 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, Frontier is rated the highest out of the airlines that fly to St. Charles.
How much is a round-trip flight to St. Charles?
A round-trip flight to St. Charles will typically cost around $250, however they can be found for as little as $84.
Where does the fastest flight to St. Charles depart from?
For those looking to save time traveling to St. Charles, Kansas City offers the quickest one-way flight (1 hour 0 minutes).
Does Lambert-St Louis have rental cars?
Yes. Those touching down at Lambert-St Louis can take advantage of the rental car 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 mi away from Lambert-St Louis).

See more FAQs

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$71+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights to St. Charles with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

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 2,558,603 searches and data was last updated on September 15, 2025.

Popular in

Cheapest in

Average price

Round-trip from

One-way from

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 September 15, 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 September 15, 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

When is the best time to book a flight to St. Charles?

Use this chart to determine the optimal time to book a round-trip flight from New York to St. Charles. Price data was last updated on September 12, 2025.

How long is the flight to St. Charles?

When is the cheapest time to fly to St. Charles?

Use this chart to determine the cheapest time to fly round-trip from New York to St. Charles. Price data was last updated on December 16, 2024.

Weekly flight availability 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

Read reviews from past customers who have flown Southwest, Delta, and United Airlines to the United States. Users can see the overall rating for each airline as well as how each is rated 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 layovers?

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

How much is a round-trip flight to St. Charles?

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

Does Lambert-St Louis have rental cars?

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.

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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 September 15, 2025.