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$54+ Cheap flights from St. Louis to Philadelphia (STL - PHL)

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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHL
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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The best prices from Lambert-St Louis to Philadelphia are usually found in June or July, booked 61 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

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 November 21, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

April

Cheapest in

June

Round-trip from

$118
(CheapOair)

One-way from

$54
(Frontier)
Provider with most accurate pricing for Lambert-St Louis-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Philadelphia flights.
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High demand for flights, 21% potential price rise
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Best time to find cheap flights, 44% 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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Find flight deals from St. Louis to Philadelphia

Cheapest flights from St. Louis to Philadelphia
Explore the most affordable flight options available from St. Louis to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/45:02 pmSTL - PHL
1 stop17h 46mFrontier
Sat 12/710:59 pmPHL - STL
1 stop25h 25mFrontier
Deal found 11/20$118
This CheapOair deal was found by Cheapflights users on 11/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/54:26 pmSTL - PHL
1 stop6h 40mMultiple Airlines
Sun 12/810:59 pmPHL - STL
1 stop25h 25mMultiple Airlines
Deal found 11/21$197
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/186:00 amSTL - PHL
Nonstop2h 12mAmerican Airlines
Wed 12/1810:37 amPHL - STL
1 stop9h 53mAmerican Airlines
Deal found 11/20$299
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/119:00 amSTL - PHL
Nonstop2h 05mSouthwest
Sat 12/142:45 pmPHL - STL
Nonstop2h 30mSouthwest
Deal found 11/20$328
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/245:17 pmSTL - PHL
1 stop6h 35mDelta
Mon 12/306:00 amPHL - STL
1 stop11h 59mDelta
Deal found 11/20$392
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/215:21 pmSTL - PHL
1 stop5h 50mSpirit Airlines
Sun 11/246:11 amPHL - STL
1 stop11h 15mSpirit Airlines
Deal found 11/19$404
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.
Fri 12/611:20 amSTL - PHL
1 stop5h 09mUnited Airlines
Mon 12/92:36 pmPHL - STL
2 stops22h 43mUnited Airlines
Deal found 11/19$524

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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 12/4

5:02 pm-11:48 am

1 stop17h 46m

Philadelphia

Sat 12/7

10:59 pm-11:24 pm

1 stop25h 25m

$118

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 12/5

4:26 pm-12:06 am

1 stop6h 40m

Philadelphia

Sun 12/8

10:59 pm-11:24 pm

1 stop25h 25m

$197

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 2/18

7:27 pm-9:50 am

1 stop13h 23m

Philadelphia

Sat 2/22

6:10 am-6:27 pm

1 stop13h 17m

$239

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 12/18

6:00 am-9:12 am

Nonstop2h 12m

Philadelphia

Wed 12/18

10:37 am-7:30 pm

1 stop9h 53m

$299

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 12/11

9:00 am-12:05 pm

Nonstop2h 05m

Philadelphia

Sat 12/14

2:45 pm-4:15 pm

Nonstop2h 30m

$328

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 12/24

5:17 pm-12:52 am

1 stop6h 35m

Philadelphia

Mon 12/30

6:00 am-4:59 pm

1 stop11h 59m

$392

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 2/13

6:30 am-2:15 pm

1 stop6h 45m

Philadelphia

Mon 2/17

10:10 am-2:36 pm

1 stop5h 26m

$428

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 12/18

3:53 pm-1:22 am

1 stop8h 29m

$54

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Tue 2/18

7:27 pm-9:50 am

1 stop13h 23m

$120

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 12/5

9:50 am-8:06 pm

2 stops9h 16m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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

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 St. Louis to Philadelphia 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
MytripPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*2 stars

*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 St. Louis-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Philadelphia 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 St. Louis-Philadelphia 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 St. Louis to Philadelphia

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

Travel insights for flights from St. Louis to Philadelphia

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

How far ahead should I 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 November 15, 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 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Philadelphia (average of $234). Flying from St. Louis to Philadelphia in March is currently the most expensive (average of $284). 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 STL to PHL?

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 November 21, 2024.

It’s typically best to fly out from St. Louis to Philadelphia in the evening. Doing so could potentially save you 47% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day 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 November 18, 2024.

Travelers seeking maximum savings on their St. Louis to Philadelphia flight should consider departing on Saturday afternoons 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 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 November 21, 2024.

The most flights from STL to PHL are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Philadelphia by month

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

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

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

If weather is an important factor for your trip to Philadelphia, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 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 November 21, 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
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

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
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

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

Spirit Airlines
6.3
Okay
8,175 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

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 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 7 flights from Lambert-St Louis to Philadelphia, all of which are around 2h 05m 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.

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

    Within the past month, 36 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 $118. Other airlines that can offer you cheap pricing are Spirit Airlines, from $239, and American Airlines, from $299. These flights start at 61% 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 $54. Users have also found prices from $120 and $157 on Spirit Airlines and American Airlines, respectively.

  • 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 Republic Airways (95%), Aer Lingus (94%) or PSA Airlines (91%) 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 $1,068, our data shows the cheapest flight currently is $194. When looking at the most popular route, (Lambert-St Louis - Philadelphia), you can expect to pay $177 for that flight.

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Philadelphia (average of $234). Flying from St. Louis to Philadelphia in March is currently the most expensive (average of $284). 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 Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to LaGuardia flights
St. Louis to LaGuardia flights
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Kansas City to Newark flights
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Kansas City to John F Kennedy Intl flights
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Kansas City to Dulles Intl flights
St. Louis to Reagan-National flights
Kansas City to Reagan-National flights
Kansas City to Philadelphia flights
Springfield to John F Kennedy Intl flights
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Springfield to LaGuardia flights
Kansas City to Pittsburgh flights
Springfield to Newark flights
Springfield to Reagan-National flights
Kansas City to Allentown flights
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Columbia to LaGuardia flights
Springfield to Philadelphia flights
Columbia to John F Kennedy Intl flights
Columbia to Philadelphia flights
Springfield to Pittsburgh flights
St. Louis to State College flights
St. Louis to Harrisburg flights
Joplin to Reagan-National flights
St. Louis to Allentown flights
Joplin to Dulles Intl flights
Springfield to Harrisburg flights
Kansas City to Erie flights
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Columbia to Newark flights
Joplin to Newark flights
Columbia to Dulles Intl flights
Joplin to LaGuardia flights
Columbia to Reagan-National flights
Springfield to Allentown flights
Kansas City to Latrobe flights
St. Louis to Elmira flights
Columbia to Pittsburgh flights
Kansas City to Elmira flights
Joplin to Philadelphia flights
Joplin to John F Kennedy Intl flights
Fort Leonard Wood to Reagan-National flights
Branson to Philadelphia flights

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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$99FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$130Average$493FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$131Average$300FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$331FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$273Average$391FlexibilityNo cancel feeOn-time63%
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