St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
54 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
St. Louis → Philadelphia
STL
St. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International AirportPHLPhiladelphiaPhiladelphia International Airport
PhiladelphiaPhiladelphia International Airport- Distance
- 812 mi
- Estimated flight time
- ~2h 10m
Philadelphia is currently 1 hour ahead of St. Louis.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 3 flights a day, observed from October 2025 to September 2026.
- 3
- flights per day
- 4
- busiest month · Nov
- 2
- quietest month · Dec
- 1 hr 46 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2.5Jan2026
- 3Feb
- 3Mar
- 2Apr
- 3May
- 4Jun
- 4Jul
- 3Aug
- 3Sep
- 3.5Oct2025
- 4Nov
- 2Dec
Airlines
Who flies it
American Airlinesall year
Southwest Airlinesall year
PSA Airlinesall year
Republic Airwayswinter
Through the day
Departure times
Local time in St. Louis. Most departures between 06:00 and 09:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 2.5Mon
- 2.2Tue
- 2.7Wed
- 2.8Thu
- 2.8Fri
- 2.2Sat
- 2.6Sun
Fleet
Aircraft observed
- Airbus A319A31942%
- Boeing 737 MAX 8B38M15%
- Boeing 737-700B73714%
- Boeing 737-800B7389%
- Bombardier CRJ900CRJ97%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2.5 | 53 |
|
| February 2026 | 3 | 37 |
|
| March 2026 | 3 | 66 |
|
| April 2026 | 2 | 69 |
|
| May 2026 | 3 | 77 |
|
| June 2026 | 4 | 99 |
|
| July 2026 | 4 | 111 |
|
| August 2026 | 3 | 88 |
|
| September 2026 | 3 | 79 |
|
| October 2025 | 3.5 | 86 |
|
| November 2025 | 4 | 94 |
|
| December 2025 | 2 | 55 |
|
Airlines observed on this route
From observed callsign routes on STL-PHL - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from St. Louis: 88.
- Direct destinations observed from Philadelphia: 139.
The airports on this route
Philadelphia International Airport
Philadelphia, United StatesPHL / KPHL
Major airport · 139 direct destinations · 4 runways · longest runway 12,001 ft
70 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from St. Louis to Philadelphia
The observed direct connection between St. Louis Lambert International Airport (STL) and Philadelphia International Airport (PHL) covers approximately 812 mi. The estimated flight time is around 2h 10m. American Airlines, PSA Airlines, Republic Airways and Southwest Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is St. Louis from Philadelphia by air?
- The great-circle distance between St. Louis Lambert International Airport and Philadelphia International Airport is approximately 812 mi.
- How long is the flight from St. Louis to Philadelphia?
- Based on the distance, the estimated flight time is about 2h 10m. This is an estimate, not a schedule.
- Is there a direct connection from St. Louis to Philadelphia?
- Yes, a direct connection between STL and PHL has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: American Airlines, PSA Airlines, Republic Airways and Southwest Airlines.
- How often is there a flight from St. Louis to Philadelphia?
- On average around 3 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 914 observed flights. Mainly American Airlines, Southwest Airlines, PSA Airlines. That is an observation, not a timetable.
- What is the current time difference between St. Louis and Philadelphia?
- Philadelphia is currently 1 hour ahead of St. Louis.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.