Cheap flights from St. Louis, MO to Philadelphia, PA

Choose between Frontier Airlines, Spirit Airlines, or United Airlines to find the best price

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The most popular airlines for this route are Frontier Airlines, Spirit Airlines, United Airlines, Southern Airways Express, and Sun Country Airlines. St. Louis and Philadelphia have 175 direct flights per week. When you arrive at Philadelphia, consider visiting Statue of Liberty, National Mall, Staten Island, Manhattan Island, Independence National Historical Park, PA, USA, Metropolitan Museum of Art, Empire State Building, Lincoln Memorial, and Times Square.

Weekly direct flights

Discover the top airlines offering direct flights from St. Louis to Philadelphia in the next month. You’ll find the number of daily direct flights per airline in the table.

Weekly direct flights for Mon 29.04 - Sun 05.05

AirlineMon 29.04Tue 30.04Wed 01.05Thu 02.05Fri 03.05Sat 04.05Sun 05.05
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Weekly direct flights for Mon 06.05 - Sun 12.05

AirlineMon 06.05Tue 07.05Wed 08.05Thu 09.05Fri 10.05Sat 11.05Sun 12.05
------1111---

Weekly direct flights for Mon 13.05 - Sun 19.05

AirlineMon 13.05Tue 14.05Wed 15.05Thu 16.05Fri 17.05Sat 18.05Sun 19.05
---1------1---1

Weekly direct flights for Mon 20.05 - Sun 26.05

AirlineMon 20.05Tue 21.05Wed 22.05Thu 23.05Fri 24.05Sat 25.05Sun 26.05
---1---------------

Check-in for a flight from St. Louis to Philadelphia

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Southern Airways ExpressFDY9XYesNo
Sun Country AirlinesSCXSYYesNo

Weather in Philadelphia

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-2°C
February6°C-1°C
March10°C2°C
April16°C7°C
May22°C12°C
June26°C17°C
July30°C21°C
August29°C20°C
September25°C17°C
October19°C11°C
November12°C4°C
December7°C0°C
Hottest Month
30°C
July
Coldest month
-2°C
January
Sunny days
268
days per year
Snow days
9
days per year

14 day forecast

Tuesday
30 Apr
86%
29°C18°C
7 May
77%
23°C16°C
Wednesday
1 May
26°C17°C
8 May
76%
24°C17°C
Thursday
2 May
26°C15°C
9 May
27°C17°C
Friday
3 May
24°C12°C
10 May
25°C16°C
Saturday
4 May
75%
12°C9°C
11 May
79%
19°C17°C
Sunday
5 May
66%
11°C9°C
12 May
81%
20°C13°C
Monday
6 May
21°C12°C
13 May
88%
25°C13°C

Frequently asked questions

What are the most popular routes to and from St. Louis?
What are the most popular routes to and from Philadelphia?
What airports are near St. Louis?
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Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Philadelphia?
What is Virtual Interlining and how do I use it?
Which airlines fly between St. Louis and Philadelphia?
When's the best time to travel between St. Louis and Philadelphia?
What flights operate between St. Louis and Philadelphia?
How many airports are there near St. Louis?
How many airports are there near Philadelphia?
What time do nonstop (direct) flights between St. Louis and Philadelphia depart?
What time do nonstop (direct) flights between St. Louis and Philadelphia arrive?
What time do flights between St. Louis and Philadelphia depart?
What time do flights between St. Louis and Philadelphia arrive?

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