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Cheap flights from St. Louis to Philadelphia (STL - PHL) 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 7/3. 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 1 — May 81
From?
To?
Wed 5/1
Wed 5/8
1 adult, Economy
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The best prices from Lambert-St Louis to Philadelphia are usually found in February or September, booked 69 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from St. Louis to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 26, 2024.

Popular in

March

Cheapest in

February

Round-trip from

$225

One-way from

$97
High demand for flights, 14% potential price rise
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Best time to find cheap flights, 9% potential price drop
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From Lambert-St Louis to Philadelphia
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One-way flight from Lambert-St Louis to Philadelphia
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What is the cheapest day to fly round-trip from St. Louis to Philadelphia?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 21% when planning your travel around this day of the week.

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

Users have found that booking a flight from St. Louis to Philadelphia 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 Philadelphia 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 Philadelphia?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, February can be a great choice for travel to Philadelphia. Flights to Philadelphia from St. Louis in February are about $399 on average during February, but can be found for as low as $171.

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

It’s typically best to fly out from St. Louis to Philadelphia in the evening. Doing so could potentially save you 53% on the flight price compared to flying at noon, which is usually more expensive.

Cheap Frontier flights from St. Louis to Philadelphia

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Philadelphia. 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 3,068,117 searches. Data last updated April 26, 2024.
Find some of the cheapest Frontier flights traveling from St. Louis to Philadelphia. Make sure to double check the flight details before booking.
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$68
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/16:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$78
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$88
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$98
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$108
Sat 7/611:47 amSTL - PHL
Nonstop2h 13mFrontier
Sat 7/139:17 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$121
Wed 5/158:04 pmSTL - PHL
1 stop8h 20mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$128
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 6/1512:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$139

Cheap American Airlines flights from St. Louis to Philadelphia

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Philadelphia. 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 3,068,117 searches. Data last updated April 26, 2024.
Have a look at some of the cheapest available American Airlines flights departing from St. Louis and landing in Philadelphia. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 6/256:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Sat 6/297:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/25$169
Wed 5/294:20 pmSTL - PHL
1 stop6h 39mAmerican Airlines
Sat 6/2910:32 amPHL - STL
1 stop7h 16mAmerican Airlines
Deal found 4/25$185
Tue 6/256:08 pmSTL - PHL
1 stop4h 23mAmerican Airlines
Sat 6/2910:32 amPHL - STL
1 stop7h 16mAmerican Airlines
Deal found 4/25$186
Thu 6/64:48 pmSTL - PHL
Nonstop2h 16mAmerican Airlines
Tue 6/117:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/25$209
Thu 6/136:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Sat 6/155:37 pmPHL - STL
1 stop5h 55mAmerican Airlines
Deal found 4/25$212
Tue 6/44:20 pmSTL - PHL
1 stop6h 39mAmerican Airlines
Thu 6/68:47 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/25$232
Wed 5/296:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Sun 6/28:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/25$244
Wed 5/226:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Sun 6/28:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/25$254
Mon 5/206:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Tue 5/218:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 4/24$269

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

Find cheap flight options from St. Louis to Philadelphia specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Prices were last updated on April 26, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Philadelphia in 2024. More deals are always being added, so be sure to check back regularly.
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$68
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/16:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$78
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$98
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$108
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mMultiple Airlines
Wed 5/294:17 pmPHL - STL
1 stop26h 12mMultiple Airlines
Deal found 4/24$117
Tue 5/212:35 pmSTL - PHL
1 stop6h 58mMultiple Airlines
Wed 5/226:30 amPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 4/25$124
Wed 5/158:04 pmSTL - PHL
1 stop8h 20mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$128
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$138
Sun 5/1911:22 pmSTL - PHL
1 stop11h 48mFrontier
Fri 5/3110:53 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$141

St. Louis to Philadelphia 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Philadelphia in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Philadelphia in 2024. More deals are always being added, so be sure to check back regularly.
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$68
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/16:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$78
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$88
Thu 5/167:23 pmSTL - PHL
1 stop10h 16mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$98
Fri 5/176:40 pmSTL - PHL
1 stop9h 59mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$108
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mMultiple Airlines
Wed 5/294:17 pmPHL - STL
1 stop26h 12mMultiple Airlines
Deal found 4/24$117
Sat 7/611:47 amSTL - PHL
Nonstop2h 13mFrontier
Sat 7/139:17 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$121
Tue 5/212:35 pmSTL - PHL
1 stop6h 58mMultiple Airlines
Wed 5/226:30 amPHL - STL
Nonstop2h 27mMultiple Airlines
Deal found 4/25$124
Wed 5/158:04 pmSTL - PHL
1 stop8h 20mFrontier
Sat 5/256:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$128

Non-stop flights to Philadelphia from St. Louis

Discover non-stop flight options from St. Louis to Philadelphia. 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 3,068,117 searches. Data last updated April 26, 2024.
For a shorter flight, select one of these non-stop flights from St. Louis to Philadelphia. Users seeking other options on flights from St. Louis to Philadelphia should update the search form at the top of the page.
Wed 5/228:47 amSTL - PHL
Nonstop2h 14mFrontier
Wed 5/296:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/24$68
Wed 5/298:47 amSTL - PHL
Nonstop2h 14mFrontier
Sat 6/16:30 amPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$78
Wed 8/143:32 pmSTL - PHL
Nonstop2h 13mFrontier
Mon 8/199:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$88
Sat 5/258:57 amSTL - PHL
Nonstop2h 14mFrontier
Mon 5/273:30 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$108
Sat 7/611:47 amSTL - PHL
Nonstop2h 13mFrontier
Sat 7/139:17 amPHL - STL
Nonstop2h 30mFrontier
Deal found 4/25$121
Mon 6/1010:36 pmSTL - PHL
Nonstop2h 14mFrontier
Sat 6/1512:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 4/25$139
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 4/25$164
Tue 6/256:08 amSTL - PHL
Nonstop2h 17mAmerican Airlines
Sat 6/297:14 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Deal found 4/25$169

St. Louis to Philadelphia flights leaving soon

Find last-minute flight options from St. Louis to Philadelphia 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 3,068,117 searches. Data last updated April 26, 2024.
Users seeking a last-minute flight from St. Louis to Philadelphia should consider booking one of these fares. Tip: verify your flight details before completing your reservation.
Sat 5/48:04 pmSTL - PHL
1 stop8h 41mFrontier
Wed 5/82:45 pmPHL - STL
1 stop7h 08mFrontier
Deal found 4/24$178
Sat 5/48:04 pmSTL - PHL
1 stop8h 41mFrontier
Sun 5/55:30 pmPHL - STL
1 stop27h 41mFrontier
Deal found 4/25$189
Fri 5/37:16 pmSTL - PHL
1 stop17h 05mFrontier
Sun 5/55:30 pmPHL - STL
1 stop27h 41mFrontier
Deal found 4/25$208
Fri 5/35:35 pmSTL - PHL
2 stops25h 54mFrontier
Sun 5/55:30 pmPHL - STL
1 stop27h 41mFrontier
Deal found 4/25$213
Sat 5/411:39 amSTL - PHL
2 stops20h 16mMultiple Airlines
Sun 5/58:10 pmPHL - STL
3 stops25h 10mMultiple Airlines
Deal found 4/25$470
Fri 5/38:46 amSTL - PHL
1 stop7h 57mAmerican Airlines
Fri 5/37:06 pmPHL - STL
Nonstop2h 37mAmerican Airlines
Deal found 4/25$488
Sat 5/411:39 amSTL - PHL
3 stops20h 16mMultiple Airlines
Sun 5/58:10 pmPHL - STL
3 stops25h 10mMultiple Airlines
Deal found 4/25$500
Sat 5/411:39 amSTL - PHL
2 stops20h 16mSpirit Airlines
Sun 5/57:37 pmPHL - STL
2 stops21h 35mSpirit Airlines
Deal found 4/25$529
Sat 5/46:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Sun 5/57:06 pmPHL - STL
Nonstop2h 37mAmerican Airlines
Deal found 4/25$564

One-way flights to Philadelphia from St. Louis

Search for one-way flight options from St. Louis to Philadelphia. 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 3,068,117 searches. Data last updated April 26, 2024.
Take a look at some of the one-way flights we've detected from St. Louis to Philadelphia. For those needing a return trip from St. Louis, there is a search form available above.
Wed 7/33:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 4/25$39
Tue 5/2110:34 amSTL - PHL
1 stop21h 26mSpirit Airlines
Deal found 4/25$43
Tue 5/72:35 pmSTL - PHL
2 stops17h 25mSpirit Airlines
Deal found 4/25$58
Mon 5/209:26 pmSTL - PHL
1 stop9h 24mFrontier
Deal found 4/24$60
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
Tue 5/2110:34 amSTL - PHL
3 stops25h 51mSpirit Airlines
Deal found 4/24$70
Tue 5/72:35 pmSTL - PHL
3 stops23h 34mSpirit Airlines
Deal found 4/25$73
Thu 5/27:30 pmSTL - PHL
1 stop16h 52mSpirit Airlines
Deal found 4/25$84

Find flights from St. Louis to Philadelphia within your budget

Customize your flight search to find flights from St. Louis to Philadelphia 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 3,068,117 searches. Data last updated April 26, 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 5/29

Nonstop2h 14m

Philadelphia

Sat 6/1

Nonstop2h 27m

$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

Thu 5/16

1 stop10h 16m

Philadelphia

Sat 5/25

Nonstop2h 27m

$98

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

Tue 6/4

1 stop21h 39m

Philadelphia

Thu 6/6

1 stop14h 05m

$161

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 6/25

Nonstop2h 17m

Philadelphia

Sat 6/29

Nonstop2h 42m

$169

Lambert-St LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 6/13

1 stop4h 43m

Philadelphia

Sat 6/15

1 stop4h 15m

$196

Flights are sorted by cheapest first

Deals found on 4/24

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Philadelphia. Price data was last updated on January 28, 2024.
The price you pay for your flight from St. Louis to Philadelphia may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from St. Louis to Philadelphia?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Philadelphia. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Philadelphia flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Philadelphia by month

Plan your trip from St. Louis to Philadelphia by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Philadelphia is currently $62 while a round-trip flight costs $122. Price data was last updated on April 21, 2024.

Currently, October is the cheapest month in which you can book a flight from St. Louis to Philadelphia (average of $225). Flying from St. Louis to Philadelphia in June is currently the most expensive (average of $318). 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.

January

$258

February

$258

March

$281

April

$277

May

$287

June

$318

July

$314

August

$258

September

$247

October

$225

November

$268

December

$253

Temperature and rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature and rainfall totals by month.

PHL

Temperature

33.8 - 78.8 °F

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated April 26, 2024.
See what other customers who have flown with Frontier, American Airlines and Delta from St. Louis to Philadelphia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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
6,173 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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.

Alaska Airlines
8.1
Very good
9,109 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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
10,966 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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
11,226 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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
14,884 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Boarding

8.3

Crew

8.7

Entertainment

7.8

Comfort

8.1

Food

7.4

Overall

8.2

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 Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Philadelphia?

    Booking a flight from Lambert-St Louis (STL) to Philadelphia (PHL) is your only option if you wish to fly from St. Louis to Philadelphia. On a typical day, there are 4 flights from Lambert-St Louis to Philadelphia, all of which are around 2h 09m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Lambert-St Louis to Philadelphia.

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

    Yes, there are multiple flights from St. Louis to Philadelphia for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $129.

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

    Cheapflights has at least 20 direct flights from St. Louis to Philadelphia under $100. A good price for a nonstop flight from St. Louis to Philadelphia is less than $200.

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

    There are currently 17+ open flights from St. Louis to Philadelphia within the next 7 days for less than $200.

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

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

  • What are the cheapest airlines flying from St. Louis to Philadelphia round-trip?

    Cheapflights users have booked flights from St. Louis to Philadelphia round-trip from $68. Other airlines that can offer you cheap pricing are Spirit Airlines, from $161, and American Airlines, from $169. These flights start at 82% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $39. Users have also found prices from $43 and $85 on Spirit Airlines and American Airlines, respectively.

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

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

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

    No one likes to see their flight delayed. When booking a flight from St. Louis to Philadelphia consider choosing Aer Lingus (96%), American Airlines (94%) or Qatar Airways (89%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from St. Louis to Philadelphia 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 $124 for that flight.

  • What does STL to PHL mean?

    Lambert-St Louis Airport is STL and Philadelphia Airport is PHL. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

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

    The amount of baggage you can bring on your St. Louis to Philadelphia 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 Philadelphia with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Philadelphia 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 Philadelphia that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Philadelphia 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 Philadelphia that allow pets onboard?

    Many airlines flying from St. Louis to Philadelphia 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 Philadelphia?

    Yes, you can often find last-minute deals on St. Louis to Philadelphia 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 Philadelphia flight deals updated?

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

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Alternative routes for St. Louis to Philadelphia
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 Philadelphia

Discover the top 5 airlines that operate flights from St. Louis to Philadelphia. 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 3,068,117 searches. Data last updated April 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$184FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$112Average$158FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$235Average$386FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$236Average$370FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$396Average$567FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
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Search flights from St. Louis to Philadelphia by cabin class

Find flights from St. Louis to Philadelphia, 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 Philadelphia

Find hourly flight availability from St. Louis to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 26, 2024.
64%of flight departuresEarly morningMidnight to 6 am
18%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
18%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Philadelphia

Explore weekly flight availability from St. Louis to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 26, 2024.
Sunday5daily flights
Monday5daily flights
Tuesday4daily flights
Wednesday4daily flights
Thursday4daily flights
Friday5daily flights
Saturday4daily flights

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

Cheapflights helps you search for flights from St. Louis to Philadelphia via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Philadelphia from St. Louis.

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Yes, we can. To see specific flights from St. Louis to Philadelphia with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from St. Louis to Philadelphia on Cheapflights with our Price Alert feature and get notified when better prices are available.

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