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Cheap flights from Philadelphia to St. Louis from R2 310

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.
Southwest Logo
6:00 - 7:45PHL  Philadelphia-STL Lambert-St Louis
2h 45mdirect
Southwest Logo
18:20 - 21:30STL  Lambert-St Louis-PHL Philadelphia
2h 10mdirect
R4 604Southwest
Tue, Dec 1 - Thu, Dec 10
Southwest Logo
19:25 - 21:00PHL  Philadelphia-STL Lambert-St Louis
2h 35mdirect
Southwest Logo
10:00 - 18:40STL  Lambert-St Louis-PHL Philadelphia
7h 40m1 stop Tampa
R4 770Southwest
Thu, Dec 17 - Sat, Dec 19
Southwest Logo
6:05 - 13:20PHL  Philadelphia-STL Lambert-St Louis
8h 15m2 stops Nashville Intl Dallas Love Field
Southwest Logo
10:20 - 13:30STL  Lambert-St Louis-PHL Philadelphia
2h 10mdirect
R4 854Southwest
Wed, Jan 6 - Wed, Jan 13
Southwest Logo
19:25 - 21:00PHL  Philadelphia-STL Lambert-St Louis
2h 35mdirect
Southwest Logo
19:55 - 23:05STL  Lambert-St Louis-PHL Philadelphia
2h 10mdirect
R4 920Southwest
Thu, Dec 17 - Sat, Dec 19
Southwest Logo
5:30 - 7:05PHL  Philadelphia-STL Lambert-St Louis
2h 35mdirect
Southwest Logo
16:30 - 22:10STL  Lambert-St Louis-PHL Philadelphia
4h 40m1 stop Nashville Intl
R5 003Southwest
Thu, Nov 26 - Thu, Dec 3
Southwest Logo
13:55 - 19:25PHL  Philadelphia-STL Lambert-St Louis
6h 30m1 stop Orlando
Southwest Logo
10:30 - 21:25STL  Lambert-St Louis-PHL Philadelphia
9h 55m2 stops Nashville Intl Chicago Midway
R5 020Southwest
Wed, Dec 16 - Thu, Dec 31
United Airlines Logo
6:00 - 10:03PHL  Philadelphia-STL Lambert-St Louis
5h 03m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
5:25 - 12:13STL  Lambert-St Louis-PHL Philadelphia
5h 48m1 stop Chicago O'Hare Intl
R5 086United Airlines
Wed, Dec 2 - Thu, Dec 3
Southwest Logo
7:30 - 13:40PHL  Philadelphia-STL Lambert-St Louis
7h 10m2 stops Chicago Midway Nashville Intl
Southwest Logo
10:30 - 21:25STL  Lambert-St Louis-PHL Philadelphia
9h 55m2 stops Nashville Intl Chicago Midway
R5 103Southwest
Wed, Dec 16 - Thu, Dec 31
Delta Logo
5:15 - 9:00PHL  Philadelphia-STL Lambert-St Louis
4h 45m1 stop Atlanta Hartsfield-Jackson
Delta Logo
19:18 - 0:54STL  Lambert-St Louis-PHL Philadelphia
4h 36m1 stop Atlanta Hartsfield-Jackson
R5 169Delta
Mon, Nov 16 - Mon, Nov 16
Southwest Logo
20:15 - 23:55PHL  Philadelphia-STL Lambert-St Louis
4h 40m1 stop Nashville Intl
Southwest Logo
20:00 - 23:10STL  Lambert-St Louis-PHL Philadelphia
2h 10mdirect
R5 336Southwest
Mon, Nov 23 - Wed, Nov 25

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Southwest flights from Philadelphia to St. Louis

Our best Southwest deals on Philadelphia to St. Louis flight tickets
Southwest
Dec 1
PHL6:00Philadelphia
2h 45m
STL7:45Lambert-St Louis
Dec 10
STL18:20Lambert-St Louis
2h 10m
PHL21:30Philadelphia
R4 604
Southwest
Dec 17
PHL19:25Philadelphia
2h 35m
STL21:00Lambert-St Louis
Dec 19
STL10:00Lambert-St Louis
7h 40m
1 stop
PHL18:40Philadelphia
R4 770
Southwest
Jan 6
PHL6:05Philadelphia
8h 15m
2 stops
STL13:20Lambert-St Louis
Jan 13
STL10:20Lambert-St Louis
2h 10m
PHL13:30Philadelphia
R4 854

Delta flights from Philadelphia to St. Louis

Our best Delta deals on Philadelphia to St. Louis flight tickets
Delta
Dec 7
PHL5:15Philadelphia
4h 46m
1 stop
STL9:01Lambert-St Louis
Dec 10
STL17:31Lambert-St Louis
6h 26m
1 stop
PHL0:57Philadelphia
R5 568
Delta
Dec 22
PHL17:54Philadelphia
7h 01m
1 stop
STL23:55Lambert-St Louis
Dec 31
STL12:00Lambert-St Louis
4h 45m
1 stop
PHL17:45Philadelphia
R6 615
Delta
Dec 22
PHL17:54Philadelphia
7h 01m
1 stop
STL23:55Lambert-St Louis
Jan 1
STL6:20Lambert-St Louis
4h 40m
1 stop
PHL12:00Philadelphia
R6 965

momondo Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Tue 1/12

6:00-7:45

Nonstop2h 45m

Lambert-St Louis

Thu 10/12

18:20-21:30

Nonstop2h 10m

R4 604

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Thu 17/12

19:25-21:00

Nonstop2h 35m

Lambert-St Louis

Sat 19/12

10:00-18:40

1 stop7h 40m

R4 770

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 6/1

6:05-13:20

2 stops8h 15m

Lambert-St Louis

Wed 13/1

10:20-13:30

Nonstop2h 10m

R4 854
Fastest return journey

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Thu 17/12

19:25-21:00

Nonstop2h 35m

Lambert-St Louis

Sat 19/12

19:55-23:05

Nonstop2h 10m

R4 920

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Thu 26/11

5:30-7:05

Nonstop2h 35m

Lambert-St Louis

Thu 3/12

16:30-22:10

1 stop4h 40m

R5 003

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 16/12

13:55-19:25

1 stop6h 30m

Lambert-St Louis

Thu 31/12

10:30-21:25

2 stops9h 55m

R5 020

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 2/12

6:00-10:03

1 stop5h 03m

Lambert-St Louis

Thu 3/12

5:25-12:13

1 stop5h 48m

R5 086

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Wed 16/12

7:30-13:40

2 stops7h 10m

Lambert-St Louis

Thu 31/12

10:30-21:25

2 stops9h 55m

R5 103

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Mon 16/11

5:15-9:00

1 stop4h 45m

Lambert-St Louis

Mon 16/11

19:18-0:54

1 stop4h 36m

R5 169

PhiladelphiaSt. Louis

PHL Philadelphia - STL Lambert-St Louis

PHLSTL

Philadelphia

Mon 23/11

20:15-23:55

1 stop4h 40m

Lambert-St Louis

Wed 25/11

20:00-23:10

Nonstop2h 10m

R5 336

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest 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 953 to R8 045.
The lowest price recently found on this route was R4 604.

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

In general, September 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 884. If you aren’t able to travel to St. Louis during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of R6 067.

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 R7 017 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 903 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 October 2026, prices for Philadelphia to St. Louis flights are approximately 156% more expensive 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 310

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 310. The best return flight deal from Philadelphia to St. Louis found on momondo in the last 72 hours is R4 604.
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?

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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.

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

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