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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 5/29. 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 27 — Jun 31
From?
To?
Mon 5/27
Mon 6/3
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 $462 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 $355. You can even find prices in December for less than $355, 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 12%.

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 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 2,730,072 searches. Data last updated May 22, 2024.
Find some of the cheapest Spirit Airlines flights traveling from St. Louis to Pennsylvania. Come back soon if you're not finding the exact deal you're looking for.
Tue 6/113:23 pmSTL - PHL
1 stop16h 37mSpirit Airlines
Wed 6/126:06 pmPHL - STL
2 stops24h 22mSpirit Airlines
Deal found 5/22$109
Tue 6/113:23 pmSTL - EWR
1 stop8h 11mSpirit Airlines
Wed 6/124:40 pmEWR - STL
1 stop25h 48mSpirit Airlines
Deal found 5/22$124
Tue 6/113:23 pmSTL - EWR
1 stop8h 11mSpirit Airlines
Wed 6/128:59 pmEWR - STL
2 stops21h 29mSpirit Airlines
Deal found 5/22$129
Tue 6/113:23 pmSTL - LGA
1 stop16h 37mSpirit Airlines
Wed 6/129:29 pmLGA - STL
2 stops20h 59mSpirit Airlines
Deal found 5/22$136
Tue 6/113:23 pmSTL - LGA
1 stop6h 44mSpirit Airlines
Tue 6/186:30 amLGA - STL
1 stop8h 53mSpirit Airlines
Deal found 5/21$138
Tue 6/113:23 pmSTL - EWR
1 stop17h 50mSpirit Airlines
Mon 6/1711:20 amEWR - STL
1 stop28h 03mSpirit Airlines
Deal found 5/20$140
Tue 6/113:23 pmSTL - EWR
2 stops29h 38mSpirit Airlines
Tue 6/185:10 amEWR - STL
1 stop10h 13mSpirit Airlines
Deal found 5/20$142
Tue 6/113:23 pmSTL - LGA
1 stop16h 37mSpirit Airlines
Mon 6/176:55 pmLGA - STL
1 stop20h 28mSpirit Airlines
Deal found 5/20$143
Tue 6/113:23 pmSTL - PHL
1 stop8h 23mSpirit Airlines
Wed 6/127:58 amPHL - STL
3 stops34h 30mSpirit Airlines
Deal found 5/22$144

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 2,730,072 searches. Data last updated May 22, 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 6/84:45 pmSTL - PHL
Nonstop2h 17mAmerican Airlines
Tue 6/117:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/22$134
Sat 6/16:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Wed 6/57:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/21$151
Wed 9/46:37 amSTL - PHL
Nonstop2h 13mAmerican Airlines
Sun 9/88:26 amPHL - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/21$156
Wed 6/196:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Wed 6/268:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/21$169
Tue 5/286:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Tue 5/287:11 pmPHL - STL
Nonstop2h 44mAmerican Airlines
Deal found 5/21$171
Sun 6/236:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Wed 6/267:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/21$176
Thu 6/136:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Tue 6/188:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/21$189
Thu 6/206:09 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Tue 6/258:00 pmDCA - STL
Nonstop2h 28mAmerican Airlines
Deal found 5/20$199
Thu 8/86:12 amSTL - DCA
Nonstop1h 59mAmerican Airlines
Sun 8/118:00 pmDCA - STL
Nonstop2h 16mAmerican Airlines
Deal found 5/21$204

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 2,730,072 searches. Prices were last updated on May 22, 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.
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Wed 6/58:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$78
Sat 6/153:08 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 6/2212:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$81
Tue 6/113:23 pmSTL - PHL
1 stop8h 23mMultiple Airlines
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/22$83
Wed 6/510:36 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$88
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$90
Fri 6/2810:36 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 7/612:54 pmPHL - STL
Nonstop2h 25mFrontier
Deal found 5/20$100
Fri 6/710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Mon 6/108:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/22$101
Tue 6/113:23 pmSTL - PHL
1 stop16h 37mSpirit Airlines
Wed 6/126:06 pmPHL - STL
2 stops24h 22mSpirit Airlines
Deal found 5/22$109
Sat 6/83:08 pmSTL - PHL
Nonstop2h 12mMultiple Airlines
Tue 6/115:05 amPHL - STL
1 stop10h 18mMultiple Airlines
Deal found 5/21$124

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 2,730,072 searches. Data last updated May 22, 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.
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Wed 6/58:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$78
Sat 6/153:08 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 6/2212:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$81
Tue 6/113:23 pmSTL - PHL
1 stop8h 23mMultiple Airlines
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/22$83
Wed 6/510:36 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$88
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$90
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 5/21$96
Fri 6/2810:36 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 7/612:54 pmPHL - STL
Nonstop2h 25mFrontier
Deal found 5/20$100
Fri 6/710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Mon 6/108:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/22$101
Tue 6/113:23 pmSTL - PHL
1 stop16h 37mSpirit Airlines
Wed 6/126:06 pmPHL - STL
2 stops24h 22mSpirit Airlines
Deal found 5/22$109

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 2,730,072 searches. Data last updated May 22, 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 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Wed 6/58:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$78
Sat 6/153:08 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 6/2212:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$81
Wed 6/510:36 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$88
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 12mFrontier
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$90
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 5/21$96
Fri 6/2810:36 pmSTL - PHL
Nonstop2h 12mFrontier
Sat 7/612:54 pmPHL - STL
Nonstop2h 25mFrontier
Deal found 5/20$100
Mon 7/159:32 pmSTL - PHL
Nonstop2h 12mFrontier
Fri 7/197:18 pmPHL - STL
Nonstop2h 24mFrontier
Deal found 5/21$110
Fri 6/2110:36 pmSTL - PHL
Nonstop2h 12mFrontier
Mon 6/248:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$131
Sat 6/84:45 pmSTL - PHL
Nonstop2h 17mAmerican Airlines
Tue 6/117:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/22$134

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 2,730,072 searches. Data last updated May 22, 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.
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Wed 6/58:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$78
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$88
Sat 6/111:39 amSTL - PHL
1 stop8h 23mMultiple Airlines
Wed 6/58:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/21$131
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Mon 6/35:01 amPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$140
Sat 6/111:39 amSTL - PHL
1 stop8h 23mMultiple Airlines
Fri 6/78:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/21$141
Sat 6/16:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Wed 6/57:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 5/21$151
Sat 6/111:39 amSTL - PHL
1 stop8h 23mMultiple Airlines
Sat 6/812:51 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 5/22$153
Tue 5/2810:44 pmSTL - PHL
1 stop12h 26mFrontier
Fri 5/3110:53 amPHL - STL
Nonstop2h 27mFrontier
Deal found 5/21$160
Sat 6/18:57 amSTL - PHL
Nonstop2h 14mFrontier
Thu 6/68:30 pmPHL - STL
1 stop14h 10mFrontier
Deal found 5/21$168

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 2,730,072 searches. Data last updated May 22, 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.
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Deal found 5/20$39
Sat 6/83:08 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 5/21$40
Sat 6/293:08 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 5/21$44
Fri 6/710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 5/21$49
Fri 8/3011:16 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 5/21$51
Fri 6/1410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 5/21$52
Tue 6/113:23 pmSTL - LGA
1 stop16h 37mSpirit Airlines
Deal found 5/21$54
Tue 10/110:34 amSTL - EWR
1 stop8h 21mSpirit Airlines
Deal found 5/22$58
Tue 6/113:23 pmSTL - EWR
1 stop6h 49mSpirit Airlines
Deal found 5/21$61

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 2,730,072 searches. Data last updated May 22, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$78 - $194

Route

Depart

Return

Price

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 6/1

Nonstop2h 14m

Philadelphia

Wed 6/5

Nonstop2h 27m

$78

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 6/15

Nonstop2h 12m

Philadelphia

Sat 6/22

Nonstop2h 27m

$81

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 6/11

1 stop8h 23m

Philadelphia

Wed 6/12

Nonstop2h 27m

$83

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 6/5

Nonstop2h 12m

Philadelphia

Fri 6/7

Nonstop2h 27m

$88

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 6/11

1 stop16h 37m

Philadelphia

Wed 6/12

2 stops24h 22m

$109

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Sat 6/8

Nonstop2h 17m

Philadelphia

Tue 6/11

Nonstop2h 42m

$134

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Mon 8/12

Nonstop2h 00m

Washington, D.C. Reagan-National

Tue 8/13

Nonstop2h 10m

$185

Lambert-St LouisWashington, D.C. Reagan-National

STL - DCA

STLDCA

Lambert-St Louis

Tue 6/11

1 stop6h 46m

Washington, D.C. Reagan-National

Wed 6/19

1 stop6h 13m

$188

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Mon 8/19

Nonstop2h 08m

Washington, D.C. Dulles Intl

Sat 8/24

Nonstop2h 21m

$194

Flights are sorted by cheapest first

Deals found on 5/21

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

Best time to book a flight from St. Louis to Pennsylvania

Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 22, 2024.
Read through reviews of airlines operating flights from St. Louis to Pennsylvania, such as Spirit Airlines, American Airlines and United Airlines. 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
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.2
Very good
6,009 reviews
Southwest
8.2
Very good
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Alaska Airlines
8.1
Very good
9,171 reviews
Southwest
8.2
Very good
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Delta
8.0
Very good
10,585 reviews
Southwest
8.2
Very good
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

United Airlines
7.4
Good
10,870 reviews
Southwest
8.2
Very good
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

American Airlines
7.3
Good
14,421 reviews
Southwest
8.2
Very good
6,009 reviews
Check prices

Crew

8.7

Comfort

8.1

Boarding

8.3

Food

7.3

Entertainment

7.8

Overall

8.2

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

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 $78, but on average you can expect to pay $113.

  • 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 $142.

  • Are there last-minute flights available from St. Louis to Pennsylvania for under $100?

    There are currently 20+ open flights from St. Louis to Pennsylvania within the next 7 days for less than $100.

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

    Nonstop flights can be found on the following days: Sunday, Saturday.

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

    Within the past month, 6 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 3 flights from St. Louis to Pennsylvania on average per day.
    Morning (6am - Noon) - 33% of flight departures
    Afternoon (Noon - 6pm) - 33% of flight departures
    Evening (6pm - Midnight) - 33% of flight departures

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

    Frontier, Spirit Airlines, and American Airlines can get you from St. Louis to Pennsylvania in just under 2h 14m. Your travel time can differ by up to 14h 23m. 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?

    $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 $54 and $66, 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 - New York LaGuardia, Lambert-St Louis - Newark and Lambert-St Louis - New York John F Kennedy Intl.

  • 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: Qatar Airways (85%), American Airlines (85%), Aer Lingus (84%).

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

    While on average a flight from St. Louis to Pennsylvania is generally $1,607, our data shows the cheapest flight currently is $84. When looking at the most popular route, (Lambert-St Louis - New York LaGuardia), you can expect to pay $146 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 5/22.

  • 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.

  • When is the best time to book a flight from St. Louis to Pennsylvania?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Pennsylvania (average of $226). Flying from St. Louis to Pennsylvania in July is currently the most expensive (average of $301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for St. Louis to Pennsylvania
See prices for flight routes from nearby airports that may be better suited for you.

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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 2,730,072 searches. Data last updated May 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$68Average$177FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$112Average$191FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$220Average$414FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$221Average$406FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$274Average$515FlexibilityNo 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 22, 2024.
15%of flight departuresEarly morningMidnight to 6 am
74%of flight departuresMorning6 am to noon
6%of flight departuresAfternoonNoon to 6 pm
5%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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