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Cheap flights from Philadelphia to St. Louis from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to St. Louis departing on 5/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Tue 4/23
Tue 4/30

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

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 Philadelphia to St. Louis by changing tabs
Frontier
May 22
PHL6:30 amPhiladelphia
2h 27m
STL7:57 amLambert-St Louis
May 29
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Frontier
May 15
PHL10:14 pmPhiladelphia
9h 54m
1 stop
STL7:08 amLambert-St Louis
May 22
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
American Airlines
Jun 13
PHL2:39 pmPhiladelphia
2h 27m
STL4:06 pmLambert-St Louis
Aug 8
STL6:37 amLambert-St Louis
2h 13m
PHL9:50 amPhiladelphia
Frontier
May 20
PHL10:59 pmPhiladelphia
9h 09m
1 stop
STL7:08 amLambert-St Louis
May 22
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Delta
Jun 26
PHL6:00 amPhiladelphia
4h 15m
1 stop
STL9:15 amLambert-St Louis
Jul 2
STL11:20 amLambert-St Louis
4h 14m
1 stop
PHL4:34 pmPhiladelphia
Spirit Airlines
May 20
PHL7:57 pmPhiladelphia
14h 42m
1 stop
STL9:39 amLambert-St Louis
May 21
STL2:35 pmLambert-St Louis
6h 58m
1 stop
PHL10:33 pmPhiladelphia

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

If you're looking for one-way flights from Philadelphia to St. Louis, view some of our deals below provided by American Airlines, Delta and Frontier
Frontier
May 1
PHL2:45 pmPhiladelphia
7h 08m
1 stop
STL8:53 pmLambert-St Louis
Spirit Airlines
Apr 25
PHL6:26 amPhiladelphia
13h 14m
1 stop
STL6:40 pmLambert-St Louis
Delta
May 23
PHL5:30 amPhiladelphia
4h 24m
1 stop
STL8:54 amLambert-St Louis

Search last-minute flights to St. Louis from Philadelphia

Find and compare round-trip flight prices for your last-minute flight from Philadelphia to St. Louis
Frontier
Apr 24
PHL8:40 pmPhiladelphia
14h 58m
1 stop
STL10:38 amLambert-St Louis
Apr 29
STL8:04 pmLambert-St Louis
18h 45m
2 stops
PHL3:49 pmPhiladelphia
Spirit Airlines
Apr 25
PHL6:26 amPhiladelphia
13h 14m
1 stop
STL6:40 pmLambert-St Louis
Apr 30
STL2:35 pmLambert-St Louis
16h 28m
2 stops
PHL8:03 amPhiladelphia
Multiple Airlines
Apr 25
PHL6:26 amPhiladelphia
13h 14m
1 stop
STL6:40 pmLambert-St Louis
Apr 30
STL12:00 pmLambert-St Louis
19h 03m
3 stops
PHL8:03 amPhiladelphia
Frontier
Apr 26
PHL8:50 pmPhiladelphia
13h 57m
1 stop
STL9:47 amLambert-St Louis
Apr 30
STL4:50 pmLambert-St Louis
11h 55m
1 stop
PHL5:45 amPhiladelphia
Frontier
Apr 26
PHL8:50 pmPhiladelphia
13h 57m
1 stop
STL9:47 amLambert-St Louis
Apr 28
STL3:29 pmLambert-St Louis
13h 06m
1 stop
PHL5:35 amPhiladelphia
Spirit Airlines
Apr 27
PHL5:10 amPhiladelphia
13h 24m
1 stop
STL5:34 pmLambert-St Louis
Apr 30
STL2:35 pmLambert-St Louis
16h 28m
2 stops
PHL8:03 amPhiladelphia

Best airlines flying from Philadelphia to St. Louis

Compare and see reviews for airlines that fly from Philadelphia to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $89Free CancellationRating
6.3
4,168 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $129Free CancellationRating
6.4
8,793 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $233Free CancellationRating
7.3
14,963 reviews
Search American Airlines flights
United AirlinesPriceFrom $252Free CancellationRating
7.4
11,346 reviews
Search United Airlines flights
DeltaPriceFrom $278Free CancellationRating
8.0
11,104 reviews
Search Delta flights
  • American Airlines Flights From Philadelphia to St. Louis

    The lowest priced American Airlines flight from Philadelphia to St. Louis from the last 72 hours was $233. Generally, American Airlines has 14 flights on this route every week with an average price of $383. American Airlines is rated 7.3/10 by our users.


Frontier flights from Philadelphia to St. Louis

Our best Frontier deals on Philadelphia to St. Louis flight tickets
Frontier
May 22
PHL6:30 amPhiladelphia
2h 27m
STL7:57 amLambert-St Louis
May 29
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Frontier
May 15
PHL10:14 pmPhiladelphia
9h 54m
1 stop
STL7:08 amLambert-St Louis
May 22
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia
Frontier
May 20
PHL10:59 pmPhiladelphia
9h 09m
1 stop
STL7:08 amLambert-St Louis
May 22
STL8:47 amLambert-St Louis
2h 14m
PHL12:01 pmPhiladelphia

Spirit Airlines flights from Philadelphia to St. Louis

Our best Spirit Airlines deals on Philadelphia to St. Louis flight tickets
Spirit Airlines
Apr 25
PHL6:26 amPhiladelphia
13h 14m
1 stop
STL6:40 pmLambert-St Louis
Apr 30
STL2:35 pmLambert-St Louis
16h 28m
2 stops
PHL8:03 amPhiladelphia
Spirit Airlines
May 20
PHL7:57 pmPhiladelphia
14h 42m
1 stop
STL9:39 amLambert-St Louis
May 21
STL2:35 pmLambert-St Louis
6h 58m
1 stop
PHL10:33 pmPhiladelphia
Spirit Airlines
May 10
PHL4:31 pmPhiladelphia
18h 57m
2 stops
STL10:28 amLambert-St Louis
May 12
STL6:19 pmLambert-St Louis
13h 41m
1 stop
PHL9:00 amPhiladelphia

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

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 Philadelphia to St. Louis?

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

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

Saturday. The cheapest day of the week is typically Saturday. The most expensive is typically Monday

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

At noon. Philadelphia to St. Louis flights are approximately 37% more expensive in the afternoon than at noon

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

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

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

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

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

46 days before. The cheapest time to buy a flight from Philadelphia to St. Louis is approximately 46 days to departure

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

As of April 2024, 3 flights take off from Philadelphia and land in St. Louis each day. The most common flight departure time for this route is 6:00PM, with 93% of daily flights taking off in the evening.

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

25 flights are operational weekly from Philadelphia to St. Louis as of April 2024. The most popular departure day for this route is Monday, with 16% of flights per week taking off on this day.

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

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

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

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

Best Price Found

$49

Fastest flight time

2h 27m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Philadelphia in the past 72 hours is $49. The best round-trip flight deal from Philadelphia to St. Louis found on momondo in the last 72 hours is $63.
The fastest flight from Philadelphia to St. Louis takes 2h 27m
Direct flights go from Philadelphia to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    There are 808.1 mi between Philadelphia and Lambert-St Louis. Typically, this will take 2h 27m by plane in normal conditions.

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

    Prices for flights from Philadelphia Airport to Lambert-St Louis Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to St. Louis for you.

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

Yes. All flights to St. Louis from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Philadelphia and alert you when they change.


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Tue 4/23
Tue 4/30
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