Cheap flights from St. Louis (STL) to Pennsylvania

STL — PHL
May 30 — Jun 61

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

Users have found that booking a flight from St. Louis to Pennsylvania at least 26 days early can save you up to 54% on average compared to booking a flight this week. If booking 26 days before your flight isn’t an option for you, users have found flights from St. Louis to Pennsylvania for as little as $380 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $505 for flights departing within the next 3 days.

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

The best pricing can be found in the month of August. Prices to Pennsylvania from St. Louis average $307. You can even find prices in August for less than $307, as users have found deals to Pennsylvania from as low as $98. The month of December appears to be one of the more expensive times to travel to Pennsylvania from St. Louis. Flying in the targeted month can save you up to 15%.

When is the cheapest time to fly from St. Louis to Pennsylvania (STL - PA)?

When flying from St. Louis to Pennsylvania, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from St. Louis to Pennsylvania in May, June 2022

The best prices found for STL to Pennsylvania flights for May, June
Jun 21 - Jun 28
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

12h 58m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 21m
$232

Multiple Airlines

View Deal

Deal found 5/24/22

May 28 - May 31
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

9h 57m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

10h 39m
$233

Multiple Airlines

View Deal

Deal found 5/23/22

Jun 15 - Jun 16
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

11h 35m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 21m
$234

Multiple Airlines

View Deal

Deal found 5/24/22

St. Louis to Pennsylvania 2022 flight deals

Cheap flights to Pennsylvania from St. Louis found for this year
Aug 9 - Aug 16
STL

Lambert-St Louis

PIT

Pittsburgh

1 stop

5h 22m
PIT

Pittsburgh

STL

Lambert-St Louis

1 stop

6h 44m
$215

American Airlines

View Deal

Deal found 5/25/22

Aug 9 - Aug 16
STL

Lambert-St Louis

PIT

Pittsburgh

1 stop

5h 22m
PIT

Pittsburgh

STL

Lambert-St Louis

2 stops

10h 11m
$220

American Airlines

View Deal

Deal found 5/25/22

Jun 21 - Jun 28
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

12h 58m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 21m
$232

Multiple Airlines

View Deal

Deal found 5/24/22

Cheap Frontier flights from St. Louis to Pennsylvania

Jun 20 - Jun 23
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

10h 34m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 33m
$246

Frontier

View Deal

Deal found 5/23/22

Jun 29 - Jul 3
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

10h 34m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

10h 35m
$277

Frontier

View Deal

Deal found 5/23/22

Jun 4 - Jun 7
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

10h 20m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

10h 39m
$284

Frontier

View Deal

Deal found 5/24/22

Cheap Spirit Airlines flights from St. Louis to Pennsylvania

May 31 - Jun 2
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

28h 43m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 13m
$285

Spirit Airlines

View Deal

Deal found 5/25/22

Jun 15 - Jun 20
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

10h 17m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

22h 47m
$314

Spirit Airlines

View Deal

Deal found 5/23/22

May 31 - Jun 2
STL

Lambert-St Louis

PHL

Philadelphia

2 stops

15h 59m
PHL

Philadelphia

STL

Lambert-St Louis

2 stops

36h 33m
$350

Spirit Airlines

View Deal

Deal found 5/25/22

Non-stop flights to Pennsylvania from St. Louis

Save time with St. Louis to Pennsylvania direct flight deals
Aug 25 - Aug 28
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 12m
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 24m
$345

American Airlines

View Deal

Deal found 5/24/22

Jun 28 - Jun 29
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 16m
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 42m
$346

American Airlines

View Deal

Deal found 5/23/22

Jun 23 - Jun 28
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 16m
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 42m
$357

American Airlines

View Deal

Deal found 5/23/22

Last minute flights from St. Louis to Pennsylvania

Late deals on return flights to Pennsylvania from St. Louis, departing today and this week
May 31 - Jun 10
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 42m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

11h 41m
$270

Multiple Airlines

View Deal

Deal found 5/23/22

Jun 1 - Jun 6
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

12h 44m
PHL

Philadelphia

STL

Lambert-St Louis

2 stops

27h 15m
$272

Multiple Airlines

View Deal

Deal found 5/25/22

May 31 - Jun 2
STL

Lambert-St Louis

PHL

Philadelphia

2 stops

29h 51m
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

8h 10m
$274

Multiple Airlines

View Deal

Deal found 5/25/22

One-way flights to Pennsylvania from St. Louis

The cheapest one-way flights from St. Louis to Pennsylvania
Jun 1
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

12h 44m
$90

Spirit Airlines

View Deal

Deal found 5/23/22

Jun 6
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

15h 11m
$105

Frontier

View Deal

Deal found 5/22/22

Jun 10
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

21h 09m
$106

Multiple Airlines

View Deal

Deal found 5/24/22

Related info for your journey

Useful info, stats and facts about St. Louis to Pennsylvania flights.

What airport do you fly from for flights from St. Louis to Pennsylvania?

If you book a flight to Pennsylvania from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

Which airlines flying from Lambert-St Louis to Pennsylvania have flexible cancellations due to COVID-19?

American Airlines, Delta, and Spirit Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from St. Louis to Pennsylvania for under $300 on Cheapflights?

Yes, there are multiple flights from St. Louis to Pennsylvania for under $300. The cheapest flight booked recently is on American Airlines for just $215, but on average you can expect to pay $255.

Are there nonstop flights from St. Louis to Pennsylvania for under $400 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Pennsylvania under $400. A good price for a nonstop flight from St. Louis to Pennsylvania is less than $402.

Are there last-minute flights available from St. Louis to Pennsylvania for under $300?

There are currently 20+ open flights from St. Louis to Pennsylvania within the next 7 days for less than $300.

What days are nonstop flights available from St. Louis to Pennsylvania?

Nonstop flights can be found on the following days: Monday, Friday.

How popular is this St. Louis to Pennsylvania flight route?

Within the past month, 60 users have taken a look at flights from Lambert-St Louis to Pennsylvania.

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

Travelers can expect 4 flights from St. Louis to Pennsylvania on average per day.
Morning (6am - Noon) - 100% of flight departures

How long is the flight from St. Louis to Pennsylvania?

American Airlines and Frontier can get you from St. Louis to Pennsylvania in just under 5h 22m. Your travel time can differ by up to 5h 12m. St. Louis and Pennsylvania are separated by a distance of 816 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from St. Louis to Pennsylvania one-way?

$90 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Frontier and Delta, with prices starting from $105 and $128, respectively.

What are the most popular routes from St. Louis to Pennsylvania?

The most popular flight routes from St. Louis to Pennsylvania are Lambert-St Louis - Philadelphia, Lambert-St Louis - Pittsburgh and Lambert-St Louis - Harrisburg.

What are the most popular airlines that fly from St. Louis to Pennsylvania?

The most popular airlines flying from St. Louis to Pennsylvania are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

What are the most reliable airlines from St. Louis to Pennsylvania?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from St. Louis to Pennsylvania on time: Aer Lingus (88%), Republic Airways (86%), American Airlines (85%).

What are the cheapest flights from St. Louis to Pennsylvania?

While on average a flight from St. Louis to Pennsylvania is generally $626, our data shows the cheapest flight currently is $124. When looking at the most popular route, (Lambert-St Louis - Philadelphia), you can expect to pay $232 for that flight.

Destination points for flights from St. Louis to Pennsylvania

Select to see more specific information for flights from St. Louis to all places in Pennsylvania

Top 5 airlines flying from St. Louis to Pennsylvania

The chart below displays the airlines Cheapflights users traveling from St. Louis to Pennsylvania choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$11Average$20FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
Spirit AirlinesCheapest$48Average$152FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$64Average$183FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
DeltaCheapest$106Average$303FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Sun Country AirCheapest$106Average$132FlexibilityNo cancel feeOn-time83%COVID-19 safety
Search Sun Country Air flights

Hourly flight availability from St. Louis to Pennsylvania

See what time of day planes typically take off from St. Louis to Pennsylvania
23%of flight departuresEarly morningMidnight to 6 am
39%of flight departuresMorning6 am to noon
29%of flight departuresAfternoonNoon to 6 pm
9%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM