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Cheap flights from Philadelphia to St. Louis from R2 083

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Philadelphia to St. Louis

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
7:13 - 10:51PHL  Philadelphia-STL Lambert-St Louis
4h 38m1 stop Atlanta Hartsfield-Jackson
Delta Logo
14:25 - 22:05STL  Lambert-St Louis-PHL Philadelphia
6h 40m1 stop Atlanta Hartsfield-Jackson
R4 474Delta
Tue, Nov 3 - Sat, Nov 7
Southwest Logo
6:25 - 7:45PHL  Philadelphia-STL Lambert-St Louis
2h 20mdirect
Southwest Logo
19:50 - 23:15STL  Lambert-St Louis-PHL Philadelphia
2h 25mdirect
R4 490Southwest
Mon, Oct 12 - Mon, Oct 19
Southwest Logo
11:25 - 19:00PHL  Philadelphia-STL Lambert-St Louis
8h 35m2 stops Chicago Midway Nashville Intl
Southwest Logo
5:30 - 12:30STL  Lambert-St Louis-PHL Philadelphia
6h 00m1 stop Dallas Love Field
R4 554Southwest
Tue, Oct 27 - Tue, Nov 3
Southwest Logo
7:45 - 15:00PHL  Philadelphia-STL Lambert-St Louis
8h 15m2 stops Chicago Midway Atlanta Hartsfield-Jackson
Southwest Logo
8:10 - 17:55STL  Lambert-St Louis-PHL Philadelphia
8h 45m2 stops Nashville Intl Chicago Midway
R4 635Southwest
Wed, Oct 14 - Wed, Oct 21
Southwest Logo
13:45 - 17:55PHL  Philadelphia-STL Lambert-St Louis
5h 10m1 stop Chicago Midway
Southwest Logo
19:50 - 23:10STL  Lambert-St Louis-PHL Philadelphia
2h 20mdirect
R4 651Southwest
Wed, Sep 30 - Fri, Oct 2
Southwest Logo
6:25 - 7:45PHL  Philadelphia-STL Lambert-St Louis
2h 20mdirect
Southwest Logo
19:50 - 23:15STL  Lambert-St Louis-PHL Philadelphia
2h 25mdirect
R4 829Southwest
Fri, Oct 16 - Fri, Oct 16
Southwest Logo
11:25 - 19:00PHL  Philadelphia-STL Lambert-St Louis
8h 35m2 stops Chicago Midway Nashville Intl
Southwest Logo
12:15 - 18:00STL  Lambert-St Louis-PHL Philadelphia
4h 45m1 stop Nashville Intl
R4 893Southwest
Tue, Oct 13 - Wed, Oct 14
Southwest Logo
14:30 - 21:00PHL  Philadelphia-STL Lambert-St Louis
7h 30m2 stops Nashville Intl Atlanta Hartsfield-Jackson
Southwest Logo
14:20 - 23:10STL  Lambert-St Louis-PHL Philadelphia
7h 50m2 stops Atlanta Hartsfield-Jackson Orlando
R4 974Southwest
Fri, Dec 11 - Mon, Dec 14
Southwest Logo
6:25 - 7:45PHL  Philadelphia-STL Lambert-St Louis
2h 20mdirect
Southwest Logo
13:05 - 18:30STL  Lambert-St Louis-PHL Philadelphia
4h 25m1 stop Nashville Intl
R4 990Southwest
Fri, Oct 16 - Fri, Oct 16
Southwest Logo
6:25 - 7:45PHL  Philadelphia-STL Lambert-St Louis
2h 20mdirect
Southwest Logo
19:50 - 23:15STL  Lambert-St Louis-PHL Philadelphia
2h 25mdirect
R5 039Southwest
Fri, Oct 9 - Mon, Oct 12

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Southwest flights from Philadelphia to St. Louis

Our best Southwest deals on Philadelphia to St. Louis flight tickets
Southwest
Oct 12
PHL6:25Philadelphia
2h 20m
STL7:45Lambert-St Louis
Oct 19
STL19:50Lambert-St Louis
2h 25m
PHL23:15Philadelphia
R4 490
Southwest
Oct 27
PHL11:25Philadelphia
8h 35m
2 stops
STL19:00Lambert-St Louis
Nov 3
STL5:30Lambert-St Louis
6h 00m
1 stop
PHL12:30Philadelphia
R4 554
Southwest
Oct 14
PHL7:45Philadelphia
8h 15m
2 stops
STL15:00Lambert-St Louis
Oct 21
STL8:10Lambert-St Louis
8h 45m
2 stops
PHL17:55Philadelphia
R4 635

United Airlines flights from Philadelphia to St. Louis

Our best United Airlines deals on Philadelphia to St. Louis flight tickets
United Airlines
Sept 26
PHL18:55Philadelphia
5h 04m
1 stop
STL22:59Lambert-St Louis
Oct 3
STL6:00Lambert-St Louis
11h 42m
2 stops
PHL18:42Philadelphia
R9 561
United Airlines
Sept 15
PHL17:01Philadelphia
5h 59m
1 stop
STL22:00Lambert-St Louis
Sept 16
STL6:00Lambert-St Louis
5h 23m
1 stop
PHL12:23Philadelphia
R9 803
United Airlines
Sept 22
PHL11:04Philadelphia
5h 34m
1 stop
STL15:38Lambert-St Louis
Sept 26
STL9:04Lambert-St Louis
4h 39m
1 stop
PHL14:43Philadelphia
R10 126

momondo Fare Finder

 
Use the filters below to find and compare flights from Philadelphia to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Tue 3/11

7:13-10:51

1 stop4h 38m

Lambert-St Louis

Sat 7/11

14:25-22:05

1 stop6h 40m

R4 474
Fastest return journey

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Mon 12/10

6:25-7:45

Nonstop2h 20m

Lambert-St Louis

Mon 19/10

19:50-23:15

Nonstop2h 25m

R4 490

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Tue 27/10

11:25-19:00

2 stops8h 35m

Lambert-St Louis

Tue 3/11

5:30-12:30

1 stop6h 00m

R4 554

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 14/10

7:45-15:00

2 stops8h 15m

Lambert-St Louis

Wed 21/10

8:10-17:55

2 stops8h 45m

R4 635

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 30/9

13:45-17:55

1 stop5h 10m

Lambert-St Louis

Fri 2/10

19:50-23:10

Nonstop2h 20m

R4 651

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Fri 16/10

6:25-7:45

Nonstop2h 20m

Lambert-St Louis

Fri 16/10

19:50-23:15

Nonstop2h 25m

R4 829

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Tue 13/10

11:25-19:00

2 stops8h 35m

Lambert-St Louis

Wed 14/10

12:15-18:00

1 stop4h 45m

R4 893

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Fri 11/12

14:30-21:00

2 stops7h 30m

Lambert-St Louis

Mon 14/12

14:20-23:10

2 stops7h 50m

R4 974

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Fri 16/10

6:25-7:45

Nonstop2h 20m

Lambert-St Louis

Fri 16/10

13:05-18:30

1 stop4h 25m

R4 990

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Fri 9/10

6:25-7:45

Nonstop2h 20m

Lambert-St Louis

Mon 12/10

19:50-23:15

Nonstop2h 25m

R5 039

Flights are sorted by cheapest return flights first.

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See travel insights to St. Louis from

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 typical price of a round-trip flight between Philadelphia and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from R4 942 to R8 220.
The lowest price recently found on this route was R4 474.

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

In general, October is the cheapest month to fly from Philadelphia to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R5 862. If you aren’t able to travel to St. Louis during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of R6 169.

What is the cheapest Philadelphia to Lambert-St Louis flight route?

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

How far in advance should I book a flight from Philadelphia to St. Louis?

You are more likely to see cheaper flights to St. Louis from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around R6 822 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Philadelphia for as low as R4 764 on momondo.

What cabin class options are available on Philadelphia to St. Louis flights?

There is only 1 cabin class available to choose from on Philadelphia to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Philadelphia to St. Louis flight prices changed over time?

As of September 2026, prices for Philadelphia to St. Louis flights are approximately 3% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

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

R2 083

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 R2 083. The best return flight deal from Philadelphia to St. Louis found on momondo in the last 72 hours is R4 474.
Direct flights go from Philadelphia to St. Louis every day.
There is 1 airport in St. Louis. From Philadelphia there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Philadelphia to St. Louis

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

    Lambert-St Louis is 1300,6 km away from Philadelphia.

  • 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 are refreshed on a daily basis.

  • 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 stopovers. 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 licence, 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.

  • What is the most popular plane model from Philadelphia to St. Louis?

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?

All flight searches from Philadelphia to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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.

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