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Cheap flights from St. Louis to Philadelphia from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Philadelphia departing on 6/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Wed 5/1

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Easily compare round-trip flights from St. Louis to Philadelphia

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from St. Louis to Philadelphia by changing tabs
Frontier
May 29
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Jun 1
PHL6:30 amPhiladelphia
2h 27m
STL7:57 amLambert-St Louis
Multiple Airlines
May 21
STL10:34 amLambert-St Louis
13h 08m
1 stop
PHL12:42 amPhiladelphia
May 22
PHL6:30 amPhiladelphia
2h 27m
STL7:57 amLambert-St Louis
Spirit Airlines
May 2
STL7:30 pmLambert-St Louis
21h 33m
1 stop
PHL6:03 pmPhiladelphia
May 8
PHL5:24 pmPhiladelphia
25h 05m
1 stop
STL5:29 pmLambert-St Louis
American Airlines
Jun 6
STL4:48 pmLambert-St Louis
2h 16m
PHL8:04 pmPhiladelphia
Jun 11
PHL10:40 amPhiladelphia
2h 36m
STL12:16 pmLambert-St Louis
Frontier
Jun 1
STL8:57 amLambert-St Louis
2h 14m
PHL12:11 pmPhiladelphia
Jul 13
PHL9:17 amPhiladelphia
2h 30m
STL10:47 amLambert-St Louis
Frontier
Jun 1
STL8:57 amLambert-St Louis
2h 14m
PHL12:11 pmPhiladelphia
Jun 8
PHL12:51 pmPhiladelphia
2h 27m
STL2:18 pmLambert-St Louis

Find the cheapest one-way flights from St. Louis to Philadelphia

If you're looking for one-way flights from St. Louis to Philadelphia, view some of our deals below provided by American Airlines, Frontier and Spirit Airlines
Frontier
Jun 8
STL3:08 pmLambert-St Louis
2h 14m
PHL6:22 pmPhiladelphia
Spirit Airlines
May 7
STL2:35 pmLambert-St Louis
17h 25m
2 stops
PHL9:00 amPhiladelphia
American Airlines
May 25
STL6:40 amLambert-St Louis
2h 10m
PHL9:50 amPhiladelphia

Search last-minute flights to Philadelphia from St. Louis

Find and compare round-trip flight prices for your last-minute flight from St. Louis to Philadelphia
Frontier
Apr 29
STL8:04 pmLambert-St Louis
8h 41m
1 stop
PHL5:45 amPhiladelphia
May 4
PHL7:54 pmPhiladelphia
12h 19m
1 stop
STL7:13 amLambert-St Louis
Spirit Airlines
Apr 29
STL5:02 pmLambert-St Louis
38h 01m
3 stops
PHL8:03 amPhiladelphia
May 5
PHL5:10 amPhiladelphia
13h 24m
1 stop
STL5:34 pmLambert-St Louis
Multiple Airlines
Apr 29
STL2:00 pmLambert-St Louis
22h 22m
3 stops
PHL1:22 pmPhiladelphia
May 2
PHL6:26 amPhiladelphia
13h 14m
1 stop
STL6:40 pmLambert-St Louis
Frontier
Apr 29
STL8:04 pmLambert-St Louis
8h 41m
1 stop
PHL5:45 amPhiladelphia
Apr 30
PHL8:40 pmPhiladelphia
14h 07m
1 stop
STL9:47 amLambert-St Louis
Frontier
Apr 29
STL8:04 pmLambert-St Louis
18h 45m
2 stops
PHL3:49 pmPhiladelphia
May 4
PHL7:54 pmPhiladelphia
12h 19m
1 stop
STL7:13 amLambert-St Louis
Frontier
Apr 26
STL5:35 pmLambert-St Louis
11h 10m
1 stop
PHL5:45 amPhiladelphia
May 4
PHL7:54 pmPhiladelphia
12h 19m
1 stop
STL7:13 amLambert-St Louis

Best airlines flying from St. Louis to Philadelphia

Compare and see reviews for airlines that fly from St. Louis to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $78Free CancellationRating
6.3
4,163 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $112Free CancellationRating
6.4
8,777 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $235Free CancellationRating
7.3
14,955 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
8.0
11,094 reviews
Search Delta flights
United AirlinesPriceFrom $396Free CancellationRating
7.4
11,325 reviews
Search United Airlines flights
  • American Airlines Flights From St. Louis to Philadelphia

    American Airlines flight deals from St. Louis to Philadelphia start from $235 round-trip. Over the 9 American Airlines flights for this route in a normal week, average airfare is usually $388 round-trip - but some users have found much cheaper deals with momondo.


Frontier flights from St. Louis to Philadelphia

Our best Frontier deals on St. Louis to Philadelphia flight tickets
Frontier
May 29
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Jun 1
PHL6:30 amPhiladelphia
2h 27m
STL7:57 amLambert-St Louis
Frontier
Jun 1
STL8:57 amLambert-St Louis
2h 14m
PHL12:11 pmPhiladelphia
Jul 13
PHL9:17 amPhiladelphia
2h 30m
STL10:47 amLambert-St Louis
Frontier
Jun 1
STL8:57 amLambert-St Louis
2h 14m
PHL12:11 pmPhiladelphia
Jun 8
PHL12:51 pmPhiladelphia
2h 27m
STL2:18 pmLambert-St Louis

American Airlines flights from St. Louis to Philadelphia

Our best American Airlines deals on St. Louis to Philadelphia flight tickets
American Airlines
Jun 6
STL4:48 pmLambert-St Louis
2h 16m
PHL8:04 pmPhiladelphia
Jun 11
PHL10:40 amPhiladelphia
2h 36m
STL12:16 pmLambert-St Louis
American Airlines
Jul 17
STL6:08 amLambert-St Louis
2h 15m
PHL9:23 amPhiladelphia
Jul 20
PHL11:45 amPhiladelphia
6h 11m
1 stop
STL4:56 pmLambert-St Louis
American Airlines
Jul 17
STL7:04 amLambert-St Louis
5h 38m
1 stop
PHL1:42 pmPhiladelphia
Jul 20
PHL1:46 pmPhiladelphia
6h 44m
1 stop
STL7:30 pmLambert-St Louis

How to get the cheapest flight ticket from St. Louis to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from St. Louis to Philadelphia?

February. The cheapest time of year to fly to Philadelphia from St. Louis is February. Most expensive is March

What is the cheapest day to depart St. Louis for Philadelphia?

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday

When is the cheapest time to fly from St. Louis to Philadelphia?

In the evening. St. Louis to Philadelphia flights are approximately 53% more expensive at noon than in the evening

What is the cheapest airline that flies to Philadelphia from St. Louis?

Spirit Airlines. American Airlines, Delta, and Frontier are the most popular carriers operating from St. Louis to Philadelphia

What is the cheapest St. Louis to Philadelphia flight route?

Lambert-St Louis - Philadelphia. Fly from Lambert-St Louis to Philadelphia for the best St. Louis - Philadelphia flight prices

How far in advance should you book St. Louis to Philadelphia flights?

51 days before. The cheapest time to buy a flight from St. Louis to Philadelphia is approximately 51 days to departure

How many flights depart from St. Louis to Philadelphia on average per day?

As of April 2024, 4 flights take off from St. Louis and land in Philadelphia each day. The most common flight departure time for this route is 5:00AM, with 64% of daily flights taking off in the morning.

How many flights depart from St. Louis to Philadelphia on average per week?

The number of flights available between St. Louis and Philadelphia is 31 per week as of April 2024. The most frequent departure day is Sunday, with 16% of weekly flights leaving on this day.

Can stopping save me money on St. Louis to Philadelphia flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Philadelphia.

Cheap St. Louis to Philadelphia (STL to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Philadelphia

Best Price Found

$39

Fastest flight time

2h 10m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from St. Louis in the past 72 hours is $39. The best round-trip flight deal from St. Louis to Philadelphia found on momondo in the last 72 hours is $78.
The fastest flight from St. Louis to Philadelphia takes 2h 10m
Direct flights go from St. Louis to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)

  • How far is Lambert-St Louis to Philadelphia by plane?

    The distance between Lambert-St Louis and Philadelphia is about 808.1 mi. Flights usually cover this in 2h 10m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Philadelphia Airport?

    Prices for flights from Lambert-St Louis Airport to Philadelphia Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Philadelphia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Philadelphia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Philadelphia Airport.

  • What documentation or ID do you need to fly to Philadelphia Airport?

    The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.


Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Philadelphia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Philadelphia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Philadelphia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Philadelphia from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Philadelphia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Philadelphia.

I’m not ready to book a flight from St. Louis to Philadelphia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Philadelphia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Philadelphia and let you know when they change.


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