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$53+ Cheap flights from Philadelphia to St. Louis (PHL - STL)

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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STL
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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The best prices from Philadelphia to Lambert-St Louis are usually found in June or July, booked 86 days in advance, depart on a Wednesday or Saturday and return on a Saturday

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 November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

December

Cheapest in

June

Round-trip from

$260
(Mytrip)

One-way from

$53
(Cheapflightsfares)
Provider with most accurate pricing for Philadelphia-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Lambert-St Louis flights.
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High demand for flights, 23% potential price rise
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Best time to find cheap flights, 36% potential price drop
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From Philadelphia to Lambert-St Louis
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One-way flight from Philadelphia to Lambert-St Louis
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Find flight deals from Philadelphia to St. Louis

Cheapest flights from Philadelphia to St. Louis
Explore the most affordable flight options available from Philadelphia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This Mytrip deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/168:20 amPHL - STL
2 stops11h 21mMultiple Airlines
Thu 12/199:50 amSTL - PHL
2 stops9h 30mMultiple Airlines
Deal found 11/19$260
This Mytrip deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1810:47 pmPHL - STL
1 stop25h 41mFrontier
Wed 12/256:49 pmSTL - PHL
1 stop9h 20mFrontier
Deal found 11/18$265
This Mytrip deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/77:27 pmPHL - STL
2 stops20h 54mSpirit Airlines
Tue 12/104:26 pmSTL - PHL
2 stops16h 34mSpirit Airlines
Deal found 11/20$274
This American Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1811:10 amPHL - STL
Nonstop2h 38mAmerican Airlines
Wed 12/256:30 amSTL - PHL
Nonstop2h 09mAmerican Airlines
Deal found 11/18$326
This Delta deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/251:14 pmPHL - STL
1 stop6h 33mDelta
Wed 1/15:17 pmSTL - PHL
1 stop6h 35mDelta
Deal found 11/19$336
This Southwest deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/253:55 pmPHL - STL
1 stop5h 45mSouthwest
Tue 12/317:00 amSTL - PHL
2 stops9h 05mSouthwest
Deal found 11/19$341
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/146:20 amPHL - STL
2 stops10h 14mUnited Airlines
Mon 12/166:30 amSTL - PHL
1 stop6h 50mUnited Airlines
Deal found 11/19$480

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Mon 12/16

8:20 am-6:41 pm

2 stops11h 21m

Lambert-St Louis

Thu 12/19

9:50 am-8:20 pm

2 stops9h 30m

$260

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Wed 12/18

10:47 pm-11:28 pm

1 stop25h 41m

Lambert-St Louis

Wed 12/25

6:49 pm-5:09 am

1 stop9h 20m

$265

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Sat 12/7

7:27 pm-3:21 pm

2 stops20h 54m

Lambert-St Louis

Tue 12/10

4:26 pm-10:00 am

2 stops16h 34m

$274

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Wed 12/18

11:10 am-12:48 pm

Nonstop2h 38m

Lambert-St Louis

Wed 12/25

6:30 am-9:39 am

Nonstop2h 09m

$326

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Wed 12/25

1:14 pm-6:47 pm

1 stop6h 33m

Lambert-St Louis

Wed 1/1

5:17 pm-12:52 am

1 stop6h 35m

$336

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Wed 12/25

3:55 pm-8:40 pm

1 stop5h 45m

Lambert-St Louis

Tue 12/31

7:00 am-5:05 pm

2 stops9h 05m

$341

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Thu 4/10

6:10 am-12:20 pm

1 stop7h 10m

Lambert-St Louis

Sun 4/13

5:18 pm-12:32 am

1 stop6h 14m

$428

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Mon 1/27

5:28 pm-11:31 pm

1 stop7h 03m

$53

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Tue 2/25

6:10 am-6:27 pm

1 stop13h 17m

$111

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Mon 1/6

8:20 am-6:41 pm

2 stops11h 21m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 14 results
1
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Compare providers for flights from Philadelphia to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to St. Louis in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Philadelphia 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.

Travel insights for flights from Philadelphia to St. Louis

Get recent, data-driven insights about flights from Philadelphia to St. Louis including ideal travel times, pricing trends, and more.

How far ahead should I 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 November 15, 2024.

Booking 86 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.

What is the cheapest month to book a flight from Philadelphia to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $308). Flying from Philadelphia to St. Louis in March is currently the most expensive (average of $357). 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.

What is the cheapest time of day to fly from PHL to STL?

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 November 20, 2024.

It’s optimal to fly from Philadelphia to St. Louis at noon. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day 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 November 18, 2024.

Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 20, 2024.

The most flights from PHL to STL are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 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 November 20, 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.
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Spirit Airlines
6.3
Okay
8,174 reviews
Southwest
8.1
Very good
5,014 reviews

Crew

8.7

Entertainment

7.7

Food

7.2

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 8 daily flights to St. Louis from 5 different airlines. 2h 25m is how long a flight from Philadelphia to Lambert-St Louis will take if you book a nonstop flight.

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

    This flight path from Philadelphia to Lambert-St Louis was viewed by 14 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 $265. Other airlines that can offer you cheap pricing are Spirit Airlines, from $274, and American Airlines, from $326. These flights start at 15% 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 $53. However, be on the lookout for offers from Spirit Airlines and American Airlines, as they are both options that can get you from Philadelphia to St. Louis for a low price.

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

    Consider Republic Airways (92%), PSA Airlines (91%) or Qatar Airways (88%) 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 $346, our data indicates the cheapest price to be $154. The most popular route (Philadelphia - Lambert-St Louis), is priced around $190.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Philadelphia to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $308). Flying from Philadelphia to St. Louis in March is currently the most expensive (average of $357). 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 Philadelphia to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$97FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$143Average$299FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$196Average$503FlexibilityNo cancel feeOn-time69%
DeltaCheapest$200Average$430FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$238Average$403FlexibilityNo cancel feeOn-time63%
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