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Cheap flights from St. Louis (STL) to Pennsylvania from $39

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — PHL
Apr 30 — May 71
From?
To?
Tue 4/30
Tue 5/7
1 adult, Economy
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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 52 days early can save you up to 124% on average compared to booking a flight this week. If booking 52 days before your flight isn’t an option for you, users have found flights from St. Louis to Pennsylvania for as little as $438 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 $579 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 February. Prices to Pennsylvania from St. Louis average $399. You can even find prices in February for less than $399, as users have found deals to Pennsylvania from as low as $171. The month of March 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 Frontier flights from St. Louis to Pennsylvania

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Pennsylvania. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Find some of the cheapest Frontier flights traveling from St. Louis to Pennsylvania. Come back soon if you're not finding the exact deal you're looking for.
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$68
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/23$76
Wed 7/33:32 pmSTL - PHL
Nonstop2h 13mFrontier
Wed 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$78
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$88
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Mon 5/2010:59 pmPHL - STL
1 stop9h 09mFrontier
Deal found 4/24$98
Thu 5/97:16 pmSTL - PHL
1 stop22h 33mFrontier
Mon 5/138:50 pmPHL - STL
1 stop20h 00mFrontier
Deal found 4/24$108
Tue 5/147:16 pmSTL - PHL
1 stop25h 03mFrontier
Fri 5/178:27 pmPHL - STL
1 stop13h 58mFrontier
Deal found 4/24$109
Sat 8/178:00 pmSTL - PHL
1 stop8h 37mFrontier
Sat 8/249:17 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$114
Fri 5/107:16 pmSTL - PHL
1 stop11h 34mFrontier
Tue 5/145:30 pmPHL - STL
1 stop24h 25mFrontier
Deal found 4/24$118

Cheap American Airlines flights from St. Louis to Pennsylvania

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Pennsylvania. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Have a look at some of the cheapest available American Airlines flights departing from St. Louis and landing in Pennsylvania. Make sure to examine the flight information before completing your reservation.
Sat 7/66:08 amSTL - PHL
Nonstop2h 15mAmerican Airlines
Wed 7/1711:45 amPHL - STL
1 stop6h 11mAmerican Airlines
Deal found 4/24$177
Wed 7/37:00 amSTL - PHL
1 stop5h 49mAmerican Airlines
Wed 7/1011:45 amPHL - STL
1 stop6h 11mAmerican Airlines
Deal found 4/24$185
Wed 7/176:06 amSTL - PHL
1 stop6h 24mAmerican Airlines
Sat 7/201:26 pmPHL - STL
1 stop5h 13mAmerican Airlines
Deal found 4/24$188
Wed 5/226:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Thu 5/238:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/24$189
Wed 5/225:04 amSTL - PHL
1 stop4h 32mAmerican Airlines
Wed 5/2911:42 amPHL - STL
1 stop4h 46mAmerican Airlines
Deal found 4/24$195
Mon 8/266:26 amSTL - PIT
1 stop8h 16mAmerican Airlines
Wed 8/2812:01 pmPIT - STL
1 stop10h 34mAmerican Airlines
Deal found 4/24$202
Thu 6/66:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Tue 6/117:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/24$209
Tue 7/236:08 amSTL - PHL
Nonstop2h 15mAmerican Airlines
Mon 7/2910:50 amPHL - STL
Nonstop2h 37mAmerican Airlines
Deal found 4/24$224
Thu 5/236:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Wed 5/297:11 pmPHL - STL
Nonstop2h 44mAmerican Airlines
Deal found 4/24$229

Cheap St. Louis to Pennsylvania flights in April & May 2024

Find cheap flight options from St. Louis to Pennsylvania specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Prices were last updated on April 25, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Pennsylvania in 2024. Check back in a little while for more flight options.
Wed 5/88:04 pmSTL - PIT
1 stop15h 37mFrontier
Sun 5/1212:36 pmPIT - STL
1 stop22h 11mFrontier
Deal found 4/24$108
Wed 5/158:04 pmSTL - PHL
1 stop8h 20mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$128
Wed 5/811:36 amSTL - PHL
1 stop17h 54mSpirit Airlines
Sat 5/115:10 amPHL - STL
1 stop12h 15mSpirit Airlines
Deal found 4/24$131
Fri 5/105:35 pmSTL - PHL
2 stops25h 54mFrontier
Mon 5/138:50 pmPHL - STL
1 stop20h 00mFrontier
Deal found 4/24$134
Wed 5/89:53 pmSTL - PHL
1 stop10h 18mFrontier
Fri 5/103:10 pmPHL - STL
1 stop25h 27mFrontier
Deal found 4/24$137
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$138
Fri 5/105:35 pmSTL - PHL
2 stops25h 54mFrontier
Tue 5/142:45 pmPHL - STL
1 stop27h 10mFrontier
Deal found 4/24$143
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Sun 5/263:25 pmPHL - STL
1 stop8h 07mFrontier
Deal found 4/25$144
Sat 5/48:04 pmSTL - PHL
1 stop8h 41mFrontier
Wed 5/87:54 pmPHL - STL
1 stop12h 19mFrontier
Deal found 4/23$146

St. Louis to Pennsylvania 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Pennsylvania in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Pennsylvania in 2024. Check back in a little while for more flight options.
Wed 5/88:04 pmSTL - PIT
1 stop15h 37mFrontier
Sun 5/1212:36 pmPIT - STL
1 stop22h 11mFrontier
Deal found 4/24$108
Wed 5/158:04 pmSTL - PHL
1 stop8h 20mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$128
Wed 5/811:36 amSTL - PHL
1 stop17h 54mSpirit Airlines
Sat 5/115:10 amPHL - STL
1 stop12h 15mSpirit Airlines
Deal found 4/24$131
Fri 5/105:35 pmSTL - PHL
2 stops25h 54mFrontier
Mon 5/138:50 pmPHL - STL
1 stop20h 00mFrontier
Deal found 4/24$134
Wed 5/89:53 pmSTL - PHL
1 stop10h 18mFrontier
Fri 5/103:10 pmPHL - STL
1 stop25h 27mFrontier
Deal found 4/24$137
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$138
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 14mFrontier
Sat 6/158:30 pmPHL - STL
1 stop19h 07mFrontier
Deal found 4/24$139
Wed 6/510:36 pmSTL - PHL
Nonstop2h 14mFrontier
Fri 6/78:30 pmPHL - STL
1 stop14h 00mFrontier
Deal found 4/24$140
Fri 5/105:35 pmSTL - PHL
2 stops25h 54mFrontier
Tue 5/142:45 pmPHL - STL
1 stop27h 10mFrontier
Deal found 4/24$143

Non-stop flights to Pennsylvania from St. Louis

Discover non-stop flight options from St. Louis to Pennsylvania. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
For a quicker trip, book one of these direct flights from St. Louis to Pennsylvania. Search for alternative flights from St. Louis to Pennsylvania by utilizing the search form above.
Sat 7/1311:47 amSTL - PHL
Nonstop2h 13mFrontier
Fri 7/268:46 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$128
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 14mFrontier
Sat 6/1512:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$139
Sat 7/611:47 amSTL - PHL
Nonstop2h 13mFrontier
Wed 7/171:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$146
Wed 6/510:36 pmSTL - PHL
Nonstop2h 14mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$162
Wed 7/173:32 pmSTL - PHL
Nonstop2h 13mFrontier
Sat 7/209:17 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$164
Thu 6/136:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Sat 6/157:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/24$169
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Fri 7/198:46 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/24$171
Wed 5/226:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Thu 5/238:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/24$189
Thu 6/66:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Tue 6/117:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/24$209

St. Louis to Pennsylvania flights leaving soon

Find last-minute flight options from St. Louis to Pennsylvania for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Check out these flights departing soon from St. Louis to Pennsylvania. To prevent any unwanted surprises, users should verify their flight info before booking.
Thu 5/97:16 pmSTL - PHL
1 stop22h 33mFrontier
Mon 5/138:50 pmPHL - STL
1 stop20h 00mFrontier
Deal found 4/24$108
Wed 5/88:04 pmSTL - PIT
1 stop15h 37mFrontier
Sun 5/1212:36 pmPIT - STL
1 stop22h 11mFrontier
Deal found 4/24$108
Wed 5/811:36 amSTL - PHL
1 stop17h 54mSpirit Airlines
Sat 5/115:10 amPHL - STL
1 stop12h 15mSpirit Airlines
Deal found 4/24$131
Wed 5/89:53 pmSTL - PHL
1 stop10h 18mFrontier
Fri 5/103:10 pmPHL - STL
1 stop25h 27mFrontier
Deal found 4/24$137
Sat 5/48:04 pmSTL - PHL
1 stop8h 41mFrontier
Wed 5/87:54 pmPHL - STL
1 stop12h 19mFrontier
Deal found 4/23$146
Fri 5/37:16 pmSTL - PHL
1 stop11h 34mFrontier
Tue 5/75:30 pmPHL - STL
1 stop28h 23mFrontier
Deal found 4/23$148
Fri 5/35:35 pmSTL - PHL
2 stops25h 54mFrontier
Tue 5/75:30 pmPHL - STL
1 stop28h 23mFrontier
Deal found 4/23$154
Tue 5/72:35 pmSTL - PIT
1 stop9h 10mMultiple Airlines
Fri 5/318:06 amPIT - STL
1 stop5h 14mMultiple Airlines
Deal found 4/24$157
Wed 5/19:53 pmSTL - PHL
1 stop10h 18mFrontier
Sat 5/47:54 pmPHL - STL
1 stop12h 19mFrontier
Deal found 4/24$160

One-way flights to Pennsylvania from St. Louis

Search for one-way flight options from St. Louis to Pennsylvania. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Take a look at some of the one-way flights we've detected from St. Louis to Pennsylvania. Those needing a return flight from St. Louis to Pennsylvania can use the search form above.
Sat 6/223:08 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/24$39
Tue 5/2110:34 amSTL - PHL
1 stop21h 26mSpirit Airlines
Deal found 4/25$43
Tue 5/72:35 pmSTL - PIT
1 stop9h 10mSpirit Airlines
Deal found 4/25$48
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Deal found 4/24$49
Mon 5/209:26 pmSTL - PHL
1 stop9h 24mFrontier
Deal found 4/24$60
Tue 5/710:34 amSTL - PIT
2 stops19h 48mSpirit Airlines
Deal found 4/25$60
Wed 6/1910:36 pmSTL - PHL
Nonstop2h 14mFrontier
Deal found 4/24$64
Tue 5/2110:34 amSTL - PHL
2 stops20h 30mSpirit Airlines
Deal found 4/24$65
Tue 5/2110:34 amSTL - PHL
2 stops20h 30mSpirit Airlines
Deal found 4/25$68

Find flights from St. Louis to Pennsylvania within your budget

Customize your flight search to find flights from St. Louis to Pennsylvania that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$68 - $196

Route

Depart

Return

Price

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/22

Nonstop2h 14m

Philadelphia

Wed 5/29

Nonstop2h 27m

$68

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/22

Nonstop2h 14m

Philadelphia

Wed 5/29

Nonstop2h 27m

$76

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 7/3

Nonstop2h 13m

Philadelphia

Wed 7/10

Nonstop2h 30m

$78

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 8/14

Nonstop2h 13m

Philadelphia

Mon 8/19

Nonstop2h 30m

$88

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/22

Nonstop2h 14m

Philadelphia

Wed 5/29

1 stop26h 12m

$117

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 5/21

1 stop6h 58m

Philadelphia

Wed 5/22

Nonstop2h 27m

$124

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/8

1 stop17h 54m

Philadelphia

Sat 5/11

1 stop12h 15m

$131

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 7/6

Nonstop2h 15m

Philadelphia

Wed 7/17

1 stop6h 11m

$177

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 6/10

1 stop4h 31m

Philadelphia

Sat 6/15

1 stop4h 15m

$196

Flights are sorted by cheapest first

Deals found on 4/24

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Pennsylvania

Get insights into the airlines that provide service to Pennsylvania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pennsylvania. Reviews last updated April 25, 2024.
Read through reviews of airlines operating flights from St. Louis to Pennsylvania, such as Frontier, American Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Southwest
8.2
Very good
6,180 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Delta
8.1
Very good
10,975 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

United Airlines
7.4
Good
11,234 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

American Airlines
7.3
Good
14,898 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Spirit Airlines
6.4
Okay
8,756 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Crew

8.7

Overall

8.2

Entertainment

7.8

Boarding

8.3

Food

7.4

Comfort

8.1

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Pennsylvania. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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.

  • Can I find flights from St. Louis to Pennsylvania for under $100 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Pennsylvania for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $112.

  • Are there nonstop flights from St. Louis to Pennsylvania for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Pennsylvania under $200. A good price for a nonstop flight from St. Louis to Pennsylvania is less than $217.

  • Are there last-minute flights available from St. Louis to Pennsylvania for under $200?

    There are currently 20+ open flights from St. Louis to Pennsylvania within the next 7 days for less than $200.

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

    Within the past month, 5 users have taken a look at flights from Lambert-St Louis to Pennsylvania.

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

    $39 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and American Airlines, with prices starting from $43 and $85, 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 (96%), American Airlines (94%), Qatar Airways (89%).

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

    While on average a flight from St. Louis to Pennsylvania is generally $1,129, our data shows the cheapest flight currently is $89. When looking at the most popular route, (Lambert-St Louis - Philadelphia), you can expect to pay $117 for that flight.

  • What does STL to PHL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Lambert-St Louis Airport to Philadelphia Airport flight would often be abbreviated as a STL to PHL flight. Pittsburgh Airport (PIT), Harrisburg Airport (MDT), Allentown-Bethlehem Airport (ABE), Wilkes-Barre Scranton Airport (AVP), State College University Park Airport (SCE) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from St. Louis to Pennsylvania that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Pennsylvania flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Pennsylvania with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Pennsylvania flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Pennsylvania that include hotel bookings?

    Yes. In addition to deals on St. Louis to Pennsylvania flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Pennsylvania?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pennsylvania.

  • Can I find deals for business class flights from St. Louis to Pennsylvania?

    Yes. Cheapflights offers flight deals from St. Louis to Pennsylvania by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Pennsylvania that allow pets onboard?

    Many airlines flying from St. Louis to Pennsylvania offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Pennsylvania?

    Yes, you can often find last-minute deals on St. Louis to Pennsylvania flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Pennsylvania flight deals updated?

    The St. Louis to Pennsylvania flight deals you see on this page were last updated on 4/25.

See more FAQs

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Top 5 airlines flying from St. Louis to Pennsylvania

Discover the top 5 airlines that operate flights from St. Louis to Pennsylvania. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$184FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$112Average$194FlexibilityNo cancel feeOn-time65%
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American AirlinesCheapest$216Average$427FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$222Average$406FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$274Average$521FlexibilityNo cancel feeOn-time69%
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Search flights from St. Louis to Pennsylvania by cabin class

Find flights from St. Louis to Pennsylvania, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from St. Louis to Pennsylvania

Find hourly flight availability from St. Louis to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2024.
56%of flight departuresEarly morningMidnight to 6 am
16%of flight departuresMorning6 am to noon
13%of flight departuresAfternoonNoon to 6 pm
15%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis to Pennsylvania?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to Pennsylvania. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Pennsylvania?

Cheapflights helps you find that perfect flight to Pennsylvania from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis to Pennsylvania with no change fees?

Need flexible booking options for your flight to Pennsylvania from St. Louis? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to Pennsylvania become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Pennsylvania from St. Louis today and book when prices fit your budget.

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