Latest deals
Insights
FAQs
Reviews

Cheap flights from Philadelphia to St. Louis 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 Philadelphia to St. Louis departing on 6/10. 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
From?
To?
Sat 5/25
Sat 6/1

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? Create a price alert to track prices.

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
Jun 10
PHL8:19 pmPhiladelphia
2h 27m
STL9:46 pmLambert-St Louis
Jun 19
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia
Multiple Airlines
Jun 15
PHL12:51 pmPhiladelphia
2h 27m
STL2:18 pmLambert-St Louis
Jun 18
STL7:30 pmLambert-St Louis
13h 53m
1 stop
PHL10:23 amPhiladelphia
American Airlines
Jun 18
PHL7:14 pmPhiladelphia
2h 42m
STL8:56 pmLambert-St Louis
Jun 25
STL4:48 pmLambert-St Louis
2h 16m
PHL8:04 pmPhiladelphia
Frontier
Jul 10
PHL7:18 pmPhiladelphia
2h 24m
STL8:42 pmLambert-St Louis
Jul 15
STL9:32 pmLambert-St Louis
2h 12m
PHL12:44 amPhiladelphia
Frontier
May 31
PHL10:53 amPhiladelphia
2h 27m
STL12:20 pmLambert-St Louis
Jun 12
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia
Spirit Airlines
Jun 18
PHL5:05 amPhiladelphia
10h 18m
1 stop
STL2:23 pmLambert-St Louis
Jun 25
STL3:23 pmLambert-St Louis
15h 43m
2 stops
PHL8:06 amPhiladelphia

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, Frontier and Spirit Airlines
Frontier
Jun 10
PHL8:19 pmPhiladelphia
2h 27m
STL9:46 pmLambert-St Louis
American Airlines
Jun 6
PHL2:39 pmPhiladelphia
2h 27m
STL4:06 pmLambert-St Louis
Spirit Airlines
May 26
PHL1:56 pmPhiladelphia
5h 44m
1 stop
STL6:40 pmLambert-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
May 27
PHL3:30 pmPhiladelphia
2h 27m
STL4:57 pmLambert-St Louis
Jun 14
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia
Multiple Airlines
May 30
PHL11:18 pmPhiladelphia
8h 50m
1 stop
STL7:08 amLambert-St Louis
Jun 4
STL2:35 pmLambert-St Louis
6h 58m
1 stop
PHL10:33 pmPhiladelphia
American Airlines
May 28
PHL7:11 pmPhiladelphia
2h 44m
STL8:55 pmLambert-St Louis
Jun 11
STL4:48 pmLambert-St Louis
2h 16m
PHL8:04 pmPhiladelphia
Spirit Airlines
May 28
PHL2:05 pmPhiladelphia
21h 41m
1 stop
STL10:46 amLambert-St Louis
Jun 11
STL3:23 pmLambert-St Louis
8h 23m
1 stop
PHL12:46 amPhiladelphia
Delta
May 29
PHL6:00 amPhiladelphia
4h 19m
1 stop
STL9:19 amLambert-St Louis
Jun 11
STL5:25 pmLambert-St Louis
4h 35m
1 stop
PHL11:00 pmPhiladelphia
Frontier
May 27
PHL3:30 pmPhiladelphia
2h 27m
STL4:57 pmLambert-St Louis
Jun 10
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia

Frontier flights from Philadelphia to St. Louis

Our best Frontier deals on Philadelphia to St. Louis flight tickets
Frontier
Jun 10
PHL8:19 pmPhiladelphia
2h 27m
STL9:46 pmLambert-St Louis
Jun 19
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia
Frontier
Jul 10
PHL7:18 pmPhiladelphia
2h 24m
STL8:42 pmLambert-St Louis
Jul 15
STL9:32 pmLambert-St Louis
2h 12m
PHL12:44 amPhiladelphia
Frontier
May 31
PHL10:53 amPhiladelphia
2h 27m
STL12:20 pmLambert-St Louis
Jun 12
STL10:36 pmLambert-St Louis
2h 12m
PHL1:48 amPhiladelphia

American Airlines flights from Philadelphia to St. Louis

Our best American Airlines deals on Philadelphia to St. Louis flight tickets
American Airlines
Jun 18
PHL7:14 pmPhiladelphia
2h 42m
STL8:56 pmLambert-St Louis
Jun 25
STL4:48 pmLambert-St Louis
2h 16m
PHL8:04 pmPhiladelphia
American Airlines
May 30
PHL8:51 amPhiladelphia
2h 38m
STL10:29 amLambert-St Louis
Jun 4
STL6:40 amLambert-St Louis
2h 10m
PHL9:50 amPhiladelphia
American Airlines
Jul 3
PHL7:14 pmPhiladelphia
2h 42m
STL8:56 pmLambert-St Louis
Jul 7
STL6:08 amLambert-St Louis
2h 15m
PHL9:23 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?

January. The cheapest time of year to fly to St. Louis from Philadelphia is January. Most expensive is November

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 Sunday

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?

Frontier. 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?

60 days before. The cheapest time to buy a flight from Philadelphia to St. Louis is approximately 60 days to departure

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

As of May 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 65% 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 May 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

$39

Fastest flight time

2h 20m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Philadelphia in the past 72 hours is $39. The best round-trip flight deal from Philadelphia to St. Louis found on momondo in the last 72 hours is $68.
The fastest flight from Philadelphia to St. Louis takes 2h 20m
Direct flights go from Philadelphia to St. Louis on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: American Airlines and Frontier.
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 24m 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.


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 $59Free CancellationRating
6.2
4,051 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $125Free CancellationRating
6.4
8,664 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $203Free CancellationRating
7.3
14,472 reviews
Search American Airlines flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
10,894 reviews
Search United Airlines flights
DeltaPriceFrom $279Free CancellationRating
8.0
10,615 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 $203. Generally, American Airlines has 14 flights on this route every week with an average price of $376. American Airlines is rated 7.3/10 by our users.


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.


An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Sat 5/25
Sat 6/1
Email me momondo's favorite deals

Find better results for your trip to the United States