Cheap flights from Philadelphia to St. Louis (PHL - STL) from $49

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 8/5. 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.
PHL — STL
Mrz 23 — Mrz 301

The best prices from Philadelphia to Lambert-St Louis are usually found in February or October, booked 64 days in advance, depart on a Saturday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to St. Louis (STL). 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 März 19, 2024.

Popular in

March

Cheapest in

February

Round-trip from

$323

One-way from

$98
High demand for flights, 11% potential price rise
Best time to find cheap flights, 9% potential price drop
From Philadelphia to Lambert-St Louis
One-way flight from Philadelphia to Lambert-St Louis

What is the cheapest day to fly round-trip from Philadelphia to St. Louis?

Sunday flights are found to be more expensive to fly from Philadelphia to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 47 days in advance, which can save you up to 91% on flights from Philadelphia to St. Louis compared to booking the week you need them. Waiting 47 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $407. For sooner than that we have options available in the next 3 days from $579.

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

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 St. Louis. Flights to St. Louis from Philadelphia in February are about $398 on average during February, but can be found for as low as $180.

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

It’s optimal to fly from Philadelphia to St. Louis in the evening. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the afternoon.

Cheap Frontier flights from Philadelphia to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Philadelphia and St. Louis. 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 3,145,932 searches. Data last updated März 19, 2024.
Check out some of the cheapest Frontier flights we've come across from Philadelphia to St. Louis. It's recommended that users confirm their flight details before booking.
Mi 5/291:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 6/263:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$78
Mi 6/121:12 pmPHL - STL
Nonstop2h 30mFrontier
Sa 6/1511:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$103
Mi 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Mo 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$113
Di 5/218:34 pmPHL - STL
1 stop14h 03mFrontier
Sa 5/2511:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$119
Mo 4/157:54 pmPHL - STL
1 stop12h 19mFrontier
Di 4/167:16 pmSTL - PHL
1 stop11h 34mFrontier
Deal found 3/17$127
Mi 7/171:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 8/73:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$128
Di 4/168:40 pmPHL - STL
1 stop14h 07mFrontier
Di 4/237:16 pmSTL - PHL
1 stop17h 05mFrontier
Deal found 3/17$139
Mi 5/2910:54 pmPHL - STL
1 stop9h 08mFrontier
Mi 6/263:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$147
Mi 4/310:14 pmPHL - STL
1 stop11h 07mFrontier
Mi 4/109:53 pmSTL - PHL
1 stop10h 18mFrontier
Deal found 3/18$157

Cheap American Airlines flights from Philadelphia to St. Louis

Explore cheap flight options specifically provided by American Airlines for the route between Philadelphia and St. Louis. 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 3,145,932 searches. Data last updated März 19, 2024.
Some of the best deals we've found on American Airlines flights traveling from Philadelphia to St. Louis. Deals are refreshing constantly so come back soon for more options.
Mi 7/1011:45 amPHL - STL
1 stop6h 20mAmerican Airlines
Mo 7/154:52 pmSTL - PHL
Nonstop2h 12mAmerican Airlines
Deal found 3/18$177
Do 5/3010:30 amPHL - STL
1 stop6h 02mAmerican Airlines
Di 6/46:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Deal found 3/18$178
Mi 5/298:26 amPHL - STL
1 stop5h 44mAmerican Airlines
Mi 6/265:29 amSTL - PHL
1 stop4h 05mAmerican Airlines
Deal found 3/18$185
Mi 7/1011:45 amPHL - STL
1 stop6h 20mAmerican Airlines
Mo 7/157:02 amSTL - PHL
1 stop5h 28mAmerican Airlines
Deal found 3/18$186
So 6/308:47 amPHL - STL
Nonstop2h 38mAmerican Airlines
Do 7/45:29 amSTL - PHL
1 stop4h 05mAmerican Airlines
Deal found 3/18$252
Do 8/2910:44 amPHL - STL
1 stop7h 33mAmerican Airlines
So 9/15:37 amSTL - PHL
1 stop6h 12mAmerican Airlines
Deal found 3/18$260
Fr 7/510:30 amPHL - STL
1 stop7h 35mAmerican Airlines
Do 7/1111:00 amSTL - PHL
1 stop4h 48mAmerican Airlines
Deal found 3/18$261
Do 5/307:11 pmPHL - STL
Nonstop2h 44mAmerican Airlines
Mo 6/36:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Deal found 3/18$279
Mo 4/157:06 pmPHL - STL
Nonstop2h 37mAmerican Airlines
Di 4/166:05 amSTL - PHL
1 stop7h 45mAmerican Airlines
Deal found 3/17$283

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

Find cheap flight options from Philadelphia to St. Louis specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on März 19, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Mo 4/157:54 pmPHL - STL
1 stop12h 19mFrontier
Di 4/167:16 pmSTL - PHL
1 stop11h 34mFrontier
Deal found 3/17$127
Di 4/168:40 pmPHL - STL
1 stop14h 07mFrontier
Di 4/237:16 pmSTL - PHL
1 stop17h 05mFrontier
Deal found 3/17$139
Di 4/308:40 pmPHL - STL
1 stop14h 07mFrontier
Mi 5/19:53 pmSTL - PHL
1 stop10h 18mFrontier
Deal found 3/18$146
Mo 4/293:10 pmPHL - STL
1 stop17h 03mMultiple Airlines
Do 5/27:30 pmSTL - PHL
1 stop11h 20mMultiple Airlines
Deal found 3/18$151
Mi 4/310:14 pmPHL - STL
1 stop11h 07mFrontier
Mi 4/109:53 pmSTL - PHL
1 stop10h 18mFrontier
Deal found 3/18$157
Sa 4/277:54 pmPHL - STL
1 stop12h 19mFrontier
Mo 4/298:04 pmSTL - PHL
1 stop8h 41mFrontier
Deal found 3/17$161
Mi 4/2412:06 pmPHL - STL
1 stop9h 47mFrontier
Fr 4/265:35 pmSTL - PHL
1 stop11h 10mFrontier
Deal found 3/18$164
Do 4/48:00 pmPHL - STL
1 stop13h 21mFrontier
Mi 4/109:53 pmSTL - PHL
1 stop10h 18mFrontier
Deal found 3/18$167
Sa 4/277:54 pmPHL - STL
1 stop12h 19mFrontier
Mo 4/298:04 pmSTL - PHL
2 stops18h 45mFrontier
Deal found 3/17$171

Philadelphia to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Philadelphia and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated März 19, 2024.
These are some of the best deals we've found on flights to St. Louis in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Mi 5/291:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 6/263:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$78
Mi 6/121:12 pmPHL - STL
Nonstop2h 30mFrontier
Sa 6/1511:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$103
Mi 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Mo 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$113
Di 5/218:34 pmPHL - STL
1 stop14h 03mFrontier
Sa 5/2511:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$119
Mo 4/157:54 pmPHL - STL
1 stop12h 19mFrontier
Di 4/167:16 pmSTL - PHL
1 stop11h 34mFrontier
Deal found 3/17$127
Mi 7/171:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 8/73:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$128
Di 4/168:40 pmPHL - STL
1 stop14h 07mFrontier
Di 4/237:16 pmSTL - PHL
1 stop17h 05mFrontier
Deal found 3/17$139
Di 4/308:40 pmPHL - STL
1 stop14h 07mFrontier
Mi 5/19:53 pmSTL - PHL
1 stop10h 18mFrontier
Deal found 3/18$146
Mi 5/2910:54 pmPHL - STL
1 stop9h 08mFrontier
Mi 6/263:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$147

Non-stop flights to St. Louis from Philadelphia

Discover non-stop flight options from Philadelphia to St. Louis. 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 3,145,932 searches. Data last updated März 19, 2024.
Consider booking one of these non-stop flights heading from Philadelphia to St. Louis. Users can also choose from other Philadelphia to St. Louis flights by using the search form above.
Mi 5/291:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 6/263:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$78
Mi 6/121:12 pmPHL - STL
Nonstop2h 30mFrontier
Sa 6/1511:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$103
Mi 7/101:12 pmPHL - STL
Nonstop2h 30mFrontier
Mo 7/1511:21 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/18$113
Mi 7/171:12 pmPHL - STL
Nonstop2h 30mFrontier
Mi 8/73:32 pmSTL - PHL
Nonstop2h 13mFrontier
Deal found 3/17$128
Do 7/112:46 pmPHL - STL
Nonstop2h 26mAmerican Airlines
Di 7/166:08 amSTL - PHL
Nonstop2h 15mAmerican Airlines
Deal found 3/18$169
Do 5/308:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Di 6/46:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Deal found 3/18$224
Di 5/217:11 pmPHL - STL
Nonstop2h 44mAmerican Airlines
Sa 5/256:40 amSTL - PHL
Nonstop2h 10mAmerican Airlines
Deal found 3/18$244
Sa 6/297:13 pmPHL - STL
Nonstop2h 42mAmerican Airlines
Di 7/24:45 pmSTL - PHL
Nonstop2h 16mAmerican Airlines
Deal found 3/18$264
Mo 6/248:47 amPHL - STL
Nonstop2h 38mAmerican Airlines
Di 6/254:45 pmSTL - PHL
Nonstop2h 16mAmerican Airlines
Deal found 3/18$269

Philadelphia to St. Louis flights leaving soon

Find last-minute flight options from Philadelphia to St. Louis 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 3,145,932 searches. Data last updated März 19, 2024.
Have a look at some of the flights available from Philadelphia to St. Louis departing last-minute. Users should be sure to double check the price, date, and time of their last-minute flight.
Do 3/281:05 pmPHL - STL
1 stop10h 10mFrontier
So 3/3111:15 pmSTL - PHL
1 stop11h 55mFrontier
Deal found 3/18$276
So 3/241:15 pmPHL - STL
1 stop10h 10mFrontier
Di 3/268:24 pmSTL - PHL
1 stop10h 36mFrontier
Deal found 3/17$328
Mo 3/2511:28 pmPHL - STL
3 stops16h 22mMultiple Airlines
Fr 3/297:30 amSTL - PHL
2 stops9h 44mMultiple Airlines
Deal found 3/18$392
Mo 3/2510:18 pmPHL - STL
2 stops17h 32mMultiple Airlines
Fr 3/298:24 pmSTL - PHL
1 stop10h 36mMultiple Airlines
Deal found 3/18$397
Mo 3/251:01 pmPHL - STL
2 stops26h 49mMultiple Airlines
Fr 3/297:30 amSTL - PHL
2 stops9h 44mMultiple Airlines
Deal found 3/18$405
Sa 3/238:45 pmPHL - STL
1 stop12h 36mMultiple Airlines
Sa 3/3011:39 amSTL - PHL
1 stop8h 40mMultiple Airlines
Deal found 3/18$428
Mo 3/255:37 pmPHL - STL
1 stop17h 46mMultiple Airlines
Fr 3/291:17 pmSTL - PHL
1 stop8h 16mMultiple Airlines
Deal found 3/18$442
Mo 3/2511:28 pmPHL - STL
3 stops16h 22mMultiple Airlines
Fr 3/293:55 pmSTL - PHL
3 stops16h 05mMultiple Airlines
Deal found 3/18$456
So 3/2410:49 pmPHL - STL
3 stops22h 31mMultiple Airlines
Di 3/264:10 pmSTL - PHL
3 stops31h 25mMultiple Airlines
Deal found 3/17$481

One-way flights to St. Louis from Philadelphia

Search for one-way flight options from Philadelphia to St. Louis. 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 3,145,932 searches. Data last updated März 19, 2024.
Take a look at some of the best available options we've come across on one-way flights from Philadelphia to St. Louis. Those seeking round-trip flights from Philadelphia to St. Louis should utilize the search form at the the top of the page.
Mo 8/59:01 amPHL - STL
Nonstop2h 30mFrontier
Deal found 3/18$49
Di 4/98:00 pmPHL - STL
1 stop25h 53mFrontier
Deal found 3/18$68
Mi 4/310:14 pmPHL - STL
1 stop11h 07mFrontier
Deal found 3/18$76
Sa 4/138:45 amPHL - STL
1 stop12h 47mFrontier
Deal found 3/18$79
Di 4/96:32 pmPHL - STL
2 stops16h 15mFrontier
Deal found 3/18$81
Di 4/28:00 pmPHL - STL
1 stop25h 13mMultiple Airlines
Deal found 3/18$83
Mo 5/278:51 amPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 3/18$85
Do 4/48:00 pmPHL - STL
1 stop13h 21mFrontier
Deal found 3/18$86
Mo 4/1512:06 pmPHL - STL
1 stop9h 05mFrontier
Deal found 3/18$87

Find flights from Philadelphia to St. Louis within your budget

Customize your flight search to find flights from Philadelphia to St. Louis 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 3,145,932 searches. Data last updated März 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$78 - $196

Route

Depart

Return

Price

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mi 5/29

Nonstop2h 30m

Lambert-St Louis

Mi 6/26

Nonstop2h 13m

$78

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mi 6/12

Nonstop2h 30m

Lambert-St Louis

Sa 6/15

Nonstop2h 13m

$103

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mi 7/10

Nonstop2h 30m

Lambert-St Louis

Mo 7/15

Nonstop2h 13m

$113

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Di 5/21

1 stop14h 03m

Lambert-St Louis

Sa 5/25

Nonstop2h 13m

$119

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mo 4/15

1 stop12h 19m

Lambert-St Louis

Di 4/16

1 stop11h 34m

$127

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mo 4/29

1 stop17h 03m

Lambert-St Louis

Do 5/2

1 stop11h 20m

$151

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mi 7/10

1 stop6h 20m

Lambert-St Louis

Mo 7/15

Nonstop2h 12m

$177

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Mo 4/15

1 stop16h 38m

Lambert-St Louis

Di 4/16

2 stops16h 28m

$179

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Do 5/30

1 stop4h 47m

Lambert-St Louis

Mo 6/3

1 stop6h 51m

$196

Flights are sorted by cheapest first

Deals found on 3/18

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to St. Louis. Price data was last updated on January 28, 2024.
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to St. Louis. Price data was last updated on March 17, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Friday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Philadelphia to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Philadelphia to St. Louis is currently $77 while a round-trip flight costs $138. Price data was last updated on March 10, 2024.

Currently, September is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $323). Flying from Philadelphia to St. Louis in June is currently the most expensive (average of $386). 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

$326

February

$331

March

$358

April

$356

May

$358

June

$386

July

$382

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated März 19, 2024.
To help decide which airline to fly from Philadelphia to St. Louis, see what other customers have to say about Frontier, American Airlines and Spirit Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very good
11,551 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

7.4
Good
11,618 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

7.3
Good
15,312 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

6.5
Okay
8,875 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

6.4
Okay
4,333 reviews
8.1
Very good
11,551 reviews

Boarding

8.2

Crew

8.6

Food

7.5

Entertainment

8.1

Comfort

7.9

Overall

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to St. Louis. 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 Philadelphia to St. Louis?

    Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Philadelphia. Booking flights from Philadelphia (PHL) to Lambert-St Louis (STL) should be relatively easy as there are 3 daily flights to St. Louis from 5 different airlines. 2h 26m is how long a flight from Philadelphia to Lambert-St Louis will take if you book a nonstop flight.

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

    Yes, there are multiple flights from Philadelphia to St. Louis for under $100. The cheapest flight booked recently is on Frontier for just $78, but on average you can expect to pay $146.

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

    Cheapflights has at least 20 direct flights from Philadelphia to St. Louis under $100. A good price for a nonstop flight from Philadelphia to St. Louis is less than $261.

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

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

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

    Cheapflights users have booked flights from Philadelphia to St. Louis round-trip from $78. Other airlines that can offer you cheap pricing are American Airlines, from $177, and Spirit Airlines, from $179. These flights start at 80% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Philadelphia to St. Louis for a low price.

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

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

    Consider Aer Lingus (93%), Iberia (90%) or British Airways (90%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to St. Louis.

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

    Looking for the cheapest flight from Philadelphia to St. Louis? While on average our users pay $290, our data indicates the cheapest price to be $114. The most popular route (Philadelphia - Lambert-St Louis), is priced around $135.

  • What does PHL to STL mean?

    PHL stands for Philadelphia Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Philadelphia to St. Louis

Discover the top 5 airlines that operate flights from Philadelphia to St. Louis. 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 3,145,932 searches. Data last updated März 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$116Average$210FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$131Average$211FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
United AirlinesCheapest$252Average$450FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$257Average$391FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$280Average$418FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Search flights from Philadelphia to St. Louis by cabin class

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

Hourly flight availability from Philadelphia to St. Louis

Find hourly flight availability from Philadelphia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated März 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
16%of flight departuresMorning6 am to noon
64%of flight departuresAfternoonNoon to 6 pm
19%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Philadelphia to St. Louis

Explore weekly flight availability from Philadelphia to St. Louis. 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 März 19, 2024.
Sunday3daily flights
Monday4daily flights
Tuesday4daily flights
Wednesday3daily flights
Thursday4daily flights
Friday3daily flights
Saturday4daily flights

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 Philadelphia to St. Louis?

Cheapflights helps you search for flights from Philadelphia to St. Louis 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 Philadelphia to St. Louis?

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 St. Louis from Philadelphia.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Philadelphia to St. Louis flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Philadelphia to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.