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Cheap flights from St. Louis (STL) to Pennsylvania from $31

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 8/17. 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
May 13 — May 201
From?
To?
Mon 5/13
Mon 5/20
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 59 days early can save you up to 49% on average compared to booking a flight this week. If booking 59 days before your flight isn’t an option for you, users have found flights from St. Louis to Pennsylvania for as little as $264 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 $482 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 December. Prices to Pennsylvania from St. Louis average $360. You can even find prices in December for less than $360, as users have found deals to Pennsylvania from as low as $167. The month of November 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 10%.

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 2,749,864 searches. Data last updated May 8, 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 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$58
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$68
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/812:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$93
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Fri 7/198:46 amPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$133
Sat 10/1911:47 amSTL - PHL
Nonstop2h 13mFrontier
Wed 10/231:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$134
Sat 8/1711:47 amSTL - PHL
Nonstop2h 13mFrontier
Sat 8/2411:14 pmPHL - STL
1 stop8h 48mFrontier
Deal found 5/7$152
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/192:45 pmPHL - STL
1 stop6h 35mFrontier
Deal found 5/7$154
Wed 7/173:32 pmSTL - PHL
Nonstop2h 13mFrontier
Sat 7/2011:14 pmPHL - STL
1 stop8h 48mFrontier
Deal found 5/7$156
Wed 6/510:36 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$157

Cheap Spirit Airlines flights from St. Louis to Pennsylvania

Explore cheap flight options specifically provided by Spirit 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 2,749,864 searches. Data last updated May 8, 2024.
Have a look at some of the cheapest available Spirit Airlines flights departing from St. Louis and landing in Pennsylvania. Make sure to examine the flight information before completing your reservation.
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Wed 5/2210:29 amPHL - STL
2 stops33h 11mSpirit Airlines
Deal found 5/7$110
Tue 5/2110:34 amSTL - PHL
1 stop27h 43mSpirit Airlines
Wed 5/227:18 pmPHL - STL
1 stop24h 22mSpirit Airlines
Deal found 5/7$119
Tue 6/42:35 pmSTL - PIT
1 stop8h 24mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$130
Tue 6/410:34 amSTL - PIT
2 stops19h 54mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$137
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Wed 5/227:18 pmPHL - STL
1 stop24h 22mSpirit Airlines
Deal found 5/7$141
Tue 6/42:35 pmSTL - PIT
1 stop8h 24mSpirit Airlines
Fri 6/75:45 pmPIT - STL
2 stops17h 49mSpirit Airlines
Deal found 5/7$155
Tue 6/410:34 amSTL - PIT
3 stops19h 54mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$157
Thu 6/66:22 pmSTL - PHL
1 stop27h 40mSpirit Airlines
Sat 6/85:05 amPHL - STL
1 stop13h 23mSpirit Airlines
Deal found 5/7$160
Tue 5/2110:34 amSTL - PHL
2 stops20h 30mSpirit Airlines
Wed 5/225:24 pmPHL - STL
2 stops26h 16mSpirit Airlines
Deal found 5/7$165

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

Find cheap flight options from St. Louis to Pennsylvania specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,749,864 searches. Prices were last updated on May 8, 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 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$58
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mMultiple Airlines
Wed 5/226:30 amPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/7$67
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$68
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/812:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$93
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Wed 5/2210:29 amPHL - STL
2 stops33h 11mSpirit Airlines
Deal found 5/7$110
Tue 5/2110:34 amSTL - PHL
1 stop27h 43mSpirit Airlines
Wed 5/227:18 pmPHL - STL
1 stop24h 22mSpirit Airlines
Deal found 5/7$119
Tue 6/42:35 pmSTL - PIT
1 stop8h 24mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$130
Fri 6/76:10 pmSTL - PHL
1 stop14h 46mMultiple Airlines
Mon 7/18:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/6$137
Tue 6/410:34 amSTL - PIT
2 stops19h 54mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$137

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 2,749,864 searches. Data last updated May 8, 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 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$58
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mMultiple Airlines
Wed 5/226:30 amPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/7$67
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$68
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/812:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$93
Tue 5/2110:34 amSTL - PHL
1 stop13h 08mSpirit Airlines
Wed 5/2210:29 amPHL - STL
2 stops33h 11mSpirit Airlines
Deal found 5/7$110
Tue 5/2110:34 amSTL - PHL
1 stop27h 43mSpirit Airlines
Wed 5/227:18 pmPHL - STL
1 stop24h 22mSpirit Airlines
Deal found 5/7$119
Tue 6/42:35 pmSTL - PIT
1 stop8h 24mSpirit Airlines
Thu 6/68:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Deal found 5/6$130
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Fri 7/198:46 amPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$133
Sat 10/1911:47 amSTL - PHL
Nonstop2h 13mFrontier
Wed 10/231:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$134

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 2,749,864 searches. Data last updated May 8, 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.
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$58
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/198:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$68
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/812:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$93
Mon 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Fri 7/198:46 amPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$133
Sat 10/1911:47 amSTL - PHL
Nonstop2h 13mFrontier
Wed 10/231:12 pmPHL - STL
Nonstop2h 30mFrontier
Deal found 5/7$134
Wed 6/510:36 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$157
Fri 6/710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Mon 7/18:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/6$167
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Fri 5/2410:53 amPHL - STL
Nonstop2h 27mFrontier
Deal found 5/7$173
Sat 6/154:45 pmSTL - PHL
Nonstop2h 17mAmerican Airlines
Tue 6/187:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/7$179

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 2,749,864 searches. Data last updated May 8, 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.
Mon 5/139:11 pmSTL - PHL
1 stop10h 59mFrontier
Tue 5/148:40 pmPHL - STL
1 stop14h 07mFrontier
Deal found 5/6$164
Thu 5/167:30 pmSTL - PHL
1 stop16h 55mSpirit Airlines
Mon 5/207:11 pmPHL - STL
1 stop19h 26mSpirit Airlines
Deal found 5/7$180
Mon 5/137:30 amSTL - PHL
2 stops10h 10mMultiple Airlines
Wed 5/157:18 pmPHL - STL
1 stop24h 22mMultiple Airlines
Deal found 5/6$205
Mon 5/137:30 amSTL - PHL
3 stops24h 30mMultiple Airlines
Wed 5/157:18 pmPHL - STL
1 stop24h 22mMultiple Airlines
Deal found 5/6$214
Thu 5/167:30 pmSTL - PHL
1 stop16h 55mSpirit Airlines
Mon 5/208:59 pmPHL - STL
2 stops17h 38mSpirit Airlines
Deal found 5/7$217
Tue 5/142:35 pmSTL - PIT
1 stop8h 24mMultiple Airlines
Thu 5/169:00 pmPIT - STL
1 stop13h 36mMultiple Airlines
Deal found 5/6$236
Mon 5/137:30 amSTL - PHL
2 stops10h 10mMultiple Airlines
Tue 5/144:35 pmPHL - STL
2 stops19h 11mMultiple Airlines
Deal found 5/6$237
Mon 5/137:30 amSTL - PHL
2 stops10h 10mMultiple Airlines
Wed 5/1510:29 amPHL - STL
3 stops33h 11mMultiple Airlines
Deal found 5/6$239
Mon 5/138:04 pmSTL - PHL
1 stop8h 41mFrontier
Thu 5/1611:54 amPHL - STL
1 stop20h 14mFrontier
Deal found 5/7$242

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 2,749,864 searches. Data last updated May 8, 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 8/1711:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 5/7$31
Sat 8/3111:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 5/7$34
Sat 5/258:57 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 5/7$39
Wed 5/228:47 amSTL - PIT
1 stop8h 39mFrontier
Deal found 5/7$55
Tue 5/142:35 pmSTL - PHL
1 stop21h 50mSpirit Airlines
Deal found 5/6$70
Thu 6/68:12 pmSTL - PIT
1 stop15h 40mSpirit Airlines
Deal found 5/7$73
Mon 6/37:18 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 5/7$74
Sun 6/26:19 pmSTL - PHL
1 stop13h 41mSpirit Airlines
Deal found 5/7$75
Fri 8/1611:16 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 5/7$80

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 2,749,864 searches. Data last updated May 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$58 - $198

Route

Depart

Return

Price

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/29

Nonstop2h 14m

Philadelphia

Sat 6/29

Nonstop2h 27m

$58

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 5/21

1 stop13h 08m

Philadelphia

Wed 5/22

Nonstop2h 27m

$67

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 6/17

Nonstop2h 12m

Philadelphia

Wed 6/19

Nonstop2h 27m

$68

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 6/1

Nonstop2h 14m

Philadelphia

Sat 6/8

Nonstop2h 27m

$93

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 5/21

1 stop13h 08m

Philadelphia

Wed 5/22

2 stops33h 11m

$110

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 5/21

1 stop27h 43m

Philadelphia

Wed 5/22

1 stop24h 22m

$119

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 6/15

Nonstop2h 17m

Philadelphia

Tue 6/18

Nonstop2h 42m

$179

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sun 6/9

1 stop16h 18m

Philadelphia

Thu 6/13

1 stop25h 41m

$185

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 6/17

1 stop3h 59m

Philadelphia

Wed 6/19

1 stop6h 01m

$198

Flights are sorted by cheapest first

Deals found on 5/7

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 May 8, 2024.
Read through reviews of airlines operating flights from St. Louis to Pennsylvania, such as Frontier, Spirit Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.1
Very good
10,789 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
11,043 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,677 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Sun Country Air
7.2
Good
640 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Spirit Airlines
6.4
Okay
8,706 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.1

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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 $58, but on average you can expect to pay $126.

  • Are there nonstop flights from St. Louis to Pennsylvania for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Pennsylvania under $100. A good price for a nonstop flight from St. Louis to Pennsylvania is less than $213.

  • 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.

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

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

  • 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.

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

    Travelers can expect 5 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?

    Frontier and Spirit Airlines can get you from St. Louis to Pennsylvania in just under 2h 14m. Your travel time can differ by up to 10h 54m. 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?

    $31 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 $70 and $90, 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 (95%), American Airlines (93%), Qatar Airways (87%).

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

    While on average a flight from St. Louis to Pennsylvania is generally $1,690, our data shows the cheapest flight currently is $88. When looking at the most popular route, (Lambert-St Louis - Philadelphia), you can expect to pay $76 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 5/7.

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Alternative routes for St. Louis to Pennsylvania
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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 2,749,864 searches. Data last updated May 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$179FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$112Average$193FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$216Average$426FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$223Average$405FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$274Average$522FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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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 May 8, 2024.
24%of flight departuresEarly morningMidnight to 6 am
59%of flight departuresMorning6 am to noon
8%of flight departuresAfternoonNoon to 6 pm
9%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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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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