Route guide
Cheap Flights from Philadelphia to St. Louis: Book Airline Tickets
- Distance
- about 810 mi
- Typical flight time
- 1 h 45 min – 2 h 45 min
- Airports
- 1 × 1
- Time difference
- 1 h behind
This page covers the practical side of flying between Philadelphia and St. Louis: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Philadelphia to St. Louis is about 810 miles (1,300 km) and a typical flight takes 1 h 45 min to 2 h 45 min. St. Louis is 1 hour behind Philadelphia. Philadelphia has 1 airport to compare and St. Louis has 1.
Airport pairs to compare
Philadelphia's airport is a hub with strong connecting traffic, and it is linked to Center City by regional rail. St. Louis has one main airport with a light rail link to downtown.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| PHL to STL | Philadelphia International | St. Louis Lambert International |
About the airports
- PHL · Philadelphia International
A hub airport with regional rail service to Center City. - STL · St. Louis Lambert International
The main airport, northwest of downtown and linked to the city by MetroLink light rail.
Airlines with a major base at either end
- At Philadelphia: American Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Philadelphia
Spring and fall are the most comfortable. Summers are hot and humid, and winter storms can disrupt flights.
St. Louis
Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice.
How long is Philadelphia to St. Louis?
At about 810 miles, Philadelphia to St. Louis is a short-to-medium flight. Fares on routes this length are sensitive to the day of the week and the time of day, so check a few departure times before you settle.
Time zones and timing
St. Louis is 1 hour behind Philadelphia, so you land at a local time 1 hour earlier than departure time plus flight time would suggest. Plan your arrival day around local time at the destination.
Getting between the airport and town
Philadelphia: SEPTA Regional Rail runs from the airport to Center City.
St. Louis: MetroLink light rail runs from the airport to downtown St. Louis. Taxis, ride-hail and rental cars are also available.
Planning ground transport too? See our car rental guide.
Good to know
- Because many passengers connect here, keep extra time between flights, especially in winter.
- Winter storms and summer thunderstorms are the usual causes of delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying St. Louis to Philadelphia?
This route guide works in both directions. For other trips, see all flights from Philadelphia or all flights from St. Louis.
Frequently asked questions
How far is Philadelphia from St. Louis?
The straight-line distance between the main airports is about 810 miles (1,300 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Philadelphia to St. Louis?
A typical scheduled flight takes roughly 1 h 45 min to 2 h 45 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Philadelphia: PHL (Philadelphia International). At St. Louis: STL (St. Louis Lambert International). Ask for prices on more than one pairing.
Is there a time difference?
St. Louis is 1 hour behind Philadelphia.
When is the best time to fly from Philadelphia to St. Louis?
In Philadelphia: Spring and fall are the most comfortable. Summers are hot and humid, and winter storms can disrupt flights. In St. Louis: Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Philadelphia to St. Louis?
Airlines with a major base at either end include American Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.