$60+ 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 7/10. 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
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 July, booked 80 days in advance, depart on a Wednesday or Tuesday and return on a Thursday
Cheap 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 June 12, 2025.
Round-trip from | $318 (Mytrip) |
|---|---|
One-way from | $60 (Booking.com) |
Popular in | May |
Cheapest in | August |
Average price | $271 |
Find 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 June 12, 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 June 12, 2025.
This Mytrip deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to St. Charles that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
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
Sat 6/21
6:17 pm-5:04 pm
2 stops23h 47m
Lambert-St Louis
Mon 7/14
10:47 am-10:26 pm
1 stop10h 39m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 6/20
5:20 am-11:53 pm
1 stop19h 33m
Lambert-St Louis
Fri 6/27
6:36 pm-6:50 am
1 stop11h 14m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sun 6/29
5:30 am-1:40 pm
1 stop9h 10m
Lambert-St Louis
Sat 7/5
11:00 am-12:21 am
1 stop12h 21m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sun 8/10
5:30 am-9:41 am
1 stop5h 11m
Lambert-St Louis
Mon 8/18
5:11 pm-12:56 am
1 stop6h 45m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 8/28
5:35 pm-10:35 pm
1 stop6h 00m
Lambert-St Louis
Sun 8/31
1:10 pm-9:35 pm
2 stops7h 25m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 8/15
6:52 pm-10:45 pm
1 stop4h 53m
Lambert-St Louis
Mon 8/18
5:30 pm-12:30 am
1 stop6h 00m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 6/27
6:44 pm-8:19 pm
Nonstop2h 35m
Lambert-St Louis
Fri 7/4
6:20 am-9:34 am
Nonstop2h 14m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 7/10
7:00 am-9:52 am
1 stop3h 52m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 9/10
4:45 pm-6:05 pm
Nonstop2h 20m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 9/2
7:15 pm-8:58 pm
Nonstop2h 43m
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 June 9, 2025.
Booking 80 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, August is the cheapest month in which you can book a flight from Philadelphia to St. Charles (average of $311). Flying from Philadelphia to St. Charles in March is currently the most expensive (average of $356). 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?
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 June 12, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to St. Charles as you normally would.
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 October 13, 2024.
Travelers seeking maximum savings on their Philadelphia to St. Charles flight should consider departing on Tuesday evenings 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.
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 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
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 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
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 June 12, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from Philadelphia to St. Charles have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
Boarding
Food
Crew
Comfort
Overall
Entertainment
Reviews
John,May 2025
PVD - BNA
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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Alternative routes for Philadelphia to St. Charles
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Philadelphia to St. Charles
Discover the top 4 airlines that operate flights from Philadelphia to St. Charles. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$50 | Average$110 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$156 | Average$496 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$200 | Average$366 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$280 | Average$416 | FlexibilityNo cancel fee | On-time63% |