How popular is this Philadelphia to St. Charles flight route?

Flights from Philadelphia to St. Charles have been viewed 41 times in the past calendar month.

How long is the flight from Philadelphia to St. Charles?

Airlines like Frontier and American Airlines fly from Philadelphia to St. Charles in about 2h 51m. The time it takes to get you to your destination can typically vary by up to 12h 18m. The distance between Philadelphia and St. Charles is about 811 mi. This flight may include one or multiple stops.

What are the cheapest airlines to fly from Philadelphia to St. Charles one-way?

One-way options have recently been found by users for as low as $70 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $80 and Southwest from $150 one-way.

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.

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).

What are the cheapest flights from Philadelphia to St. Charles?

While on average a flight from Philadelphia to St. Charles is generally $354, our data shows the cheapest flight currently is $144. When looking at the most popular route, (Philadelphia - Lambert-St Louis), you can expect to pay $143 for that flight.

What are the most reliable airlines from Philadelphia to St. Charles?

No one likes to see their flight delayed. When booking a flight from Philadelphia to St. Charles consider choosing Republic Airways (96%), American Airlines (87%) or Southwest (84%) as they are the most reliable in getting you off to your destination on time.

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

Before booking your flight from Philadelphia to St. Charles check out the most popular airlines for this route: American Airlines, Southwest or Frontier.

What airport do you fly from for flights from Philadelphia to St. Charles?

Philadelphia (PHL), located 7.0 mi from the city center, is the airport you fly out of when you book flights from Philadelphia to St. Charles. 5 airlines have flights from Philadelphia to St. Charles on a regular basis. Booking flights from Philadelphia to St. Charles should not be difficult; the airport handles an average of 7 outbound flights to St. Charles per day.

Can I find deals for flights from Philadelphia to St. Charles that include hotel bookings?

Yes. In addition to deals on Philadelphia to St. Charles flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Philadelphia to St. Charles?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to St. Charles.

Can I find deals for business class flights from Philadelphia to St. Charles?

Yes. Cheapflights offers flight deals from Philadelphia to St. Charles by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$67+ Flights from Philadelphia to St. Charles

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Philadelphia to St. Charles are usually found in August or September, booked 87 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Philadelphia to St. Charles

Cheapest flights from Philadelphia to St. Charles
Explore the most affordable flight options available from Philadelphia to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Sun 12/218:36 pmPHL - STL

1 stop14h 26mFrontier

Mon 12/294:27 pmSTL - PHL

1 stop7h 13mFrontier

Deal found 12/14

$237

Thu 12/181:46 pmPHL - STL

1 stop9h 47mFrontier

Thu 1/295:42 pmSTL - PHL

1 stop27h 50mFrontier

Deal found 12/14

$277

Sun 12/215:10 amPHL - STL

1 stop5h 30mFrontier

Mon 1/57:43 pmSTL - PHL

1 stop8h 48mFrontier

Deal found 12/13

$298

Fri 12/197:10 amPHL - STL

1 stop15h 15mFrontier

Mon 1/57:43 pmSTL - PHL

1 stop8h 48mFrontier

Deal found 12/13

$313

Fri 12/193:46 pmPHL - STL

1 stop7h 47mFrontier

Wed 12/314:27 pmSTL - PHL

1 stop7h 13mFrontier

Deal found 12/13

$317

Thu 12/181:46 pmPHL - STL

1 stop9h 47mFrontier

Fri 12/199:07 amSTL - PHL

1 stop14h 06mFrontier

Deal found 12/14

$327

Sun 12/216:53 pmPHL - STL

2 stops24h 43mMultiple Airlines

Mon 1/510:40 amSTL - PHL

1 stop12h 16mMultiple Airlines

Deal found 12/13

$328

Mon 12/223:59 pmPHL - STL

1 stop7h 34mFrontier

Mon 1/57:43 pmSTL - PHL

1 stop8h 48mFrontier

Deal found 12/13

$335

Sat 12/207:10 amPHL - STL

1 stop15h 15mFrontier

Mon 1/57:43 pmSTL - PHL

1 stop8h 48mFrontier

Deal found 12/13

$343

Fri 12/196:00 amPHL - STL

1 stop17h 33mFrontier

Sun 12/2110:10 pmSTL - PHL

1 stop30h 30mFrontier

Deal found 12/13

$347

Mon 12/2210:00 pmPHL - STL

1 stop25h 33mFrontier

Wed 12/314:27 pmSTL - PHL

1 stop7h 13mFrontier

Deal found 12/13

$354

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

Fri 1/239:02 pmPHL - STL

1 stop15h 09mFrontier

Tue 1/275:42 pmSTL - PHL

1 stop15h 55mFrontier

Deal found 12/15

$149

Sat 1/179:45 amPHL - STL

Nonstop2h 51mAmerican Airlines

Tue 1/206:00 amSTL - PHL

Nonstop2h 22mAmerican Airlines

Deal found 12/13

$297

Thu 12/256:00 amPHL - STL

1 stop4h 24mDelta

Thu 1/15:13 pmSTL - PHL

1 stop6h 14mDelta

Deal found 12/13

$317

Sat 1/1712:00 pmPHL - STL

1 stop11h 34mFrontier

Sat 1/2411:00 amSTL - PHL

1 stop10h 46mFrontier

Deal found 12/14

$164

Tue 2/176:20 pmPHL - STL

1 stop4h 25mSouthwest

Thu 2/264:25 pmSTL - PHL

Nonstop2h 05mSouthwest

Deal found 12/14

$378

Thu 1/299:02 pmPHL - STL

1 stop14h 21mFrontier

Sun 2/15:42 pmSTL - PHL

2 stops19h 07mFrontier

Deal found 12/13

$194

Sat 1/103:53 pmPHL - STL

1 stop7h 40mFrontier

Sat 1/173:43 pmSTL - PHL

2 stops15h 53mFrontier

Deal found 12/12

$206

Sun 1/188:47 pmPHL - STL

Nonstop2h 57mAmerican Airlines

Tue 1/209:33 amSTL - PHL

Nonstop2h 16mAmerican Airlines

Deal found 12/13

$297

Sat 1/246:55 amPHL - STL

1 stop5h 59mDelta

Sat 1/245:56 pmSTL - PHL

1 stop4h 17mDelta

Deal found 12/15

$373

Thu 1/153:59 pmPHL - STL

1 stop7h 35mFrontier

Mon 1/1912:47 pmSTL - PHL

1 stop10h 40mFrontier

Deal found 12/13

$311

Fri 1/164:51 pmPHL - STL

1 stop7h 21mAmerican Airlines

Sun 1/189:33 amSTL - PHL

Nonstop2h 16mAmerican Airlines

Deal found 12/13

$380

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

Fri 1/97:20 pmPHL - STL

1 stop28h 13mFrontier

Mon 1/125:11 pmSTL - PHL

1 stop6h 18mFrontier

Deal found 12/15

$155

Mon 1/126:01 pmPHL - STL

1 stop29h 33mFrontier

Mon 1/198:32 pmSTL - PHL

1 stop27h 10mFrontier

Deal found 12/14

$143

Tue 1/208:43 pmPHL - STL

1 stop27h 50mMultiple Airlines

Mon 1/265:42 pmSTL - PHL

1 stop20h 02mMultiple Airlines

Deal found 12/15

$133

Wed 1/2111:47 amPHL - STL

2 stops12h 46mFrontier

Tue 1/275:42 pmSTL - PHL

1 stop15h 55mFrontier

Deal found 12/15

$152

Thu 1/223:54 pmPHL - STL

1 stop8h 39mFrontier

Tue 1/275:42 pmSTL - PHL

1 stop15h 55mFrontier

Deal found 12/15

$137

Thu 1/229:02 pmPHL - STL

1 stop27h 31mFrontier

Sun 1/255:42 pmSTL - PHL

1 stop27h 50mFrontier

Deal found 12/12

$141

Thu 1/223:54 pmPHL - STL

1 stop8h 39mFrontier

Sat 1/2411:00 amSTL - PHL

1 stop10h 46mFrontier

Deal found 12/15

$145

Thu 1/229:02 pmPHL - STL

1 stop14h 21mFrontier

Fri 1/238:22 pmSTL - PHL

1 stop13h 56mFrontier

Deal found 12/15

$157

Fri 1/239:02 pmPHL - STL

1 stop15h 09mFrontier

Tue 1/275:42 pmSTL - PHL

1 stop15h 55mFrontier

Deal found 12/15

$149

Sun 1/2510:45 pmPHL - STL

1 stop11h 36mFrontier

Tue 1/275:42 pmSTL - PHL

1 stop15h 55mFrontier

Deal found 12/15

$142

Sun 1/2510:45 pmPHL - STL

1 stop11h 36mFrontier

Wed 1/285:42 pmSTL - PHL

1 stop15h 17mFrontier

Deal found 12/15

$154

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

Thu 1/83:56 pmPHL - STL

1 stop7h 37mFrontier

Deal found 12/14

$67

Tue 1/1311:00 amPHL - STL

1 stop20h 51mFrontier

Deal found 12/15

$68

Wed 1/142:00 pmPHL - STL

1 stop9h 34mFrontier

Deal found 12/15

$73

Wed 1/148:43 pmPHL - STL

1 stop26h 51mMultiple Airlines

Deal found 12/14

$76

Mon 1/125:10 amPHL - STL

1 stop11h 55mFrontier

Deal found 12/13

$78

Sat 1/103:53 pmPHL - STL

1 stop7h 40mFrontier

Deal found 12/13

$79

Sun 1/115:30 amPHL - STL

1 stop27h 35mMultiple Airlines

Deal found 12/15

$80

Wed 3/115:05 amPHL - STL

1 stop6h 32mFrontier

Deal found 12/14

$81

Tue 1/131:40 pmPHL - STL

2 stops18h 11mMultiple Airlines

Deal found 12/15

$86

Thu 3/128:25 pmPHL - STL

1 stop14h 24mFrontier

Deal found 12/14

$87

Thu 1/156:18 amPHL - STL

2 stops17h 16mFrontier

Deal found 12/15

$90

Thu 1/155:30 amPHL - STL

1 stop18h 04mMultiple Airlines

Deal found 12/14

$97

Find flight deals from Philadelphia to St. Charles

Most accurate provider	Gotogate 3 stars
Most trusted provider	Gotogate 3 stars
Round-trip from	$133 (Kiwi.com)
One-way from	$67 (Trip.com)
Popular in	May
Cheapest in	August
Average price	$462

Provider with most accurate pricing for Philadelphia-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Philadelphia-Lambert-St Louis flights.

Search Deals

From Philadelphia to St. Charles

Search Deals

One-way flight from Philadelphia to St. Charles

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($35 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Fri 1/23

9:02 pm-11:11 am

1 stop15h 09m

Lambert-St Louis

Tue 1/27

5:42 pm-10:37 am

1 stop15h 55m

$149

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sat 1/17

12:00 pm-10:34 pm

1 stop11h 34m

Lambert-St Louis

Sat 1/24

11:00 am-10:46 pm

1 stop10h 46m

$164

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Thu 1/29

9:02 pm-10:23 am

1 stop14h 21m

Lambert-St Louis

Sun 2/1

5:42 pm-1:49 pm

2 stops19h 07m

$194

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sat 1/10

3:53 pm-10:33 pm

1 stop7h 40m

Lambert-St Louis

Sat 1/17

3:43 pm-8:36 am

2 stops15h 53m

$206

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sat 1/17

9:45 am-11:36 am

Nonstop2h 51m

Lambert-St Louis

Tue 1/20

6:00 am-9:22 am

Nonstop2h 22m

$297

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sun 1/18

8:47 pm-10:44 pm

Nonstop2h 57m

Lambert-St Louis

Tue 1/20

9:33 am-12:49 pm

Nonstop2h 16m

$297

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Thu 1/15

3:59 pm-10:34 pm

1 stop7h 35m

Lambert-St Louis

Mon 1/19

12:47 pm-12:27 am

1 stop10h 40m

$311

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Thu 12/25

6:00 am-9:24 am

1 stop4h 24m

Lambert-St Louis

Thu 1/1

5:13 pm-12:27 am

1 stop6h 14m

$317

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sat 1/24

6:55 am-11:54 am

1 stop5h 59m

Lambert-St Louis

Sat 1/24

5:56 pm-11:13 pm

1 stop4h 17m

$373

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Tue 2/17

6:20 pm-9:45 pm

1 stop4h 25m

Lambert-St Louis

Thu 2/26

4:25 pm-7:30 pm

Nonstop2h 05m

$378

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 22 results

Best time to book a flight from Philadelphia to St. Charles

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

How far ahead should I book a flight from Philadelphia to St. Charles?

Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to St. Charles. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to St. Charles?

Currently, March is the cheapest month in which you can book a flight from Philadelphia to St. Charles (average of $60). Flying from Philadelphia to St. Charles in December is currently the most expensive (average of $245). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to CH5?

A simple way to save on the total cost of your ticket is to fly from Philadelphia to St. Charles in the afternoon. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Philadelphia to St. Charles?

Travelers seeking maximum savings on their Philadelphia to St. Charles flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Philadelphia to St. Charles

The most flights from PHL to CH5 are scheduled on a Monday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing St. Charles

Read reviews from past customers who have flown Southwest, Delta, and American Airlines from Philadelphia to St. Charles. 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

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,010 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,048 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Spirit Airlines

6.3

Okay

8,186 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,082 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airport do you fly from for flights from Philadelphia to St. Charles?
Philadelphia (PHL), located 7.0 mi from the city center, is the airport you fly out of when you book flights from Philadelphia to St. Charles. 5 airlines have flights from Philadelphia to St. Charles on a regular basis. Booking flights from Philadelphia to St. Charles should not be difficult; the airport handles an average of 7 outbound flights to St. Charles per day.
How popular is this Philadelphia to St. Charles flight route?
Flights from Philadelphia to St. Charles have been viewed 41 times in the past calendar month.
How long is the flight from Philadelphia to St. Charles?
Airlines like Frontier and American Airlines fly from Philadelphia to St. Charles in about 2h 51m. The time it takes to get you to your destination can typically vary by up to 12h 18m. The distance between Philadelphia and St. Charles is about 811 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Philadelphia to St. Charles one-way?
One-way options have recently been found by users for as low as $70 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $80 and Southwest from $150 one-way.
What are the most reliable airlines from Philadelphia to St. Charles?
No one likes to see their flight delayed. When booking a flight from Philadelphia to St. Charles consider choosing Republic Airways (96%), American Airlines (87%) or Southwest (84%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Philadelphia to St. Charles?
While on average a flight from Philadelphia to St. Charles is generally $354, our data shows the cheapest flight currently is $144. When looking at the most popular route, (Philadelphia - Lambert-St Louis), you can expect to pay $143 for that flight.
Can I find deals for flights from Philadelphia to St. Charles that include hotel bookings?
Yes. In addition to deals on Philadelphia to St. Charles flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Philadelphia to St. Charles?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to St. Charles.
Can I find deals for business class flights from Philadelphia to St. Charles?
Yes. Cheapflights offers flight deals from Philadelphia to St. Charles by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Philadelphia to St. Charles?
Currently, March is the cheapest month in which you can book a flight from Philadelphia to St. Charles (average of $60). Flying from Philadelphia to St. Charles in December is currently the most expensive (average of $245). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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Top 5 airlines flying from Philadelphia to St. Charles

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$95	Average$178	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$130	Average$223	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$240	Average$526	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$255	Average$419	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$259	Average$358	FlexibilityNo cancel fee	On-timeN/A

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$67+ Cheap flights from Philadelphia (PHL) to St. Charles, MO

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to St. Charles with Cheapflights

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3. Compare prices and book

Cheapflights Tip: The best prices from Philadelphia to St. Charles are usually found in August or September, booked 87 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Philadelphia to St. Charles

Cheapest flights from Philadelphia to St. CharlesExplore the most affordable flight options available from Philadelphia to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Explore the most affordable flight options available from Philadelphia to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Find flight deals from Philadelphia to St. Charles

Keep the following information in mind while searching for Philadelphia to St. Charles flight deals. Data was last updated December 15, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Best time to book a flight from Philadelphia to St. Charles

Have a flexible travel schedule? Discover the best time to fly to St. Charles from Philadelphia with our price prediction graph.

Cheapflights Insights

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

How far ahead should I book a flight from Philadelphia to St. Charles?

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

What is the cheapest month to book a flight from Philadelphia to St. Charles?

What is the cheapest time of day to fly from PHL to CH5?

Find hourly flight availability from Philadelphia to St. Charles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

What is the cheapest day to fly from Philadelphia to St. Charles?

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

Weekly flight availability from Philadelphia to St. Charles

Reviews of airlines servicing St. Charles

Read reviews from past customers who have flown Southwest, Delta, and American Airlines from Philadelphia to St. Charles. 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.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to St. Charles. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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Cheapest flights from Philadelphia to St. Charles
Explore the most affordable flight options available from Philadelphia to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.