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Cheap flights from Philadelphia to St. Louis (PHL - STL) from $29

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.
PHL — STL
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
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 Saturday or Wednesday and return on a Tuesday

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 June 6, 2024.

Popular in

November

Cheapest in

June

Round-trip from

$318

One-way from

$95
High demand for flights, 20% potential price rise
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Best time to find cheap flights, 20% 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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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 61 days in advance, which can save you up to 226% on flights from Philadelphia to St. Louis compared to booking the week you need them. Waiting 61 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 $476. For sooner than that we have options available in the next 3 days from $549.

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

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, June can be a great choice for travel to St. Louis. Flights to St. Louis from Philadelphia in June are about $340 on average during June, but can be found for as low as $68.

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

It’s optimal to fly from Philadelphia to St. Louis at noon. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight in the afternoon.

Cheap Philadelphia to St. Louis flights in June & July 2024

Find cheap flight options from Philadelphia to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 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.
Wed 7/38:19 pmPHL - STL
Nonstop2h 27mFrontier
Sat 7/63:09 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/4$58
Wed 7/107:18 pmPHL - STL
Nonstop2h 24mFrontier
Mon 7/159:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$68
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Fri 6/1410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$70
Sat 7/1312:54 pmPHL - STL
Nonstop2h 25mFrontier
Mon 7/159:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$71
Mon 7/87:18 pmPHL - STL
Nonstop2h 24mFrontier
Wed 7/109:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$72
Fri 6/218:19 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/2410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$78
Fri 7/197:18 pmPHL - STL
Nonstop2h 24mFrontier
Mon 7/229:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$80
Fri 6/148:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Tue 6/1811:57 amSTL - PHL
1 stop10h 23mMultiple Airlines
Deal found 6/5$89
Sat 6/2912:51 pmPHL - STL
Nonstop2h 27mFrontier
Wed 7/310:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/4$93

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 3,050,429 searches. Data last updated June 6, 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.
Wed 9/111:12 pmPHL - STL
Nonstop2h 30mFrontier
Sat 9/1411:47 amSTL - PHL
Nonstop2h 13mFrontier
Deal found 6/5$53
Wed 7/38:19 pmPHL - STL
Nonstop2h 27mFrontier
Sat 7/63:09 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/4$58
Fri 8/97:18 pmPHL - STL
Nonstop2h 24mFrontier
Mon 8/129:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/4$65
Wed 7/107:18 pmPHL - STL
Nonstop2h 24mFrontier
Mon 7/159:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$68
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Fri 6/1410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$70
Sat 7/1312:54 pmPHL - STL
Nonstop2h 25mFrontier
Mon 7/159:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$71
Mon 7/87:18 pmPHL - STL
Nonstop2h 24mFrontier
Wed 7/109:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$72
Fri 6/218:19 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/2410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$78
Fri 7/197:18 pmPHL - STL
Nonstop2h 24mFrontier
Mon 7/229:32 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$80

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 3,050,429 searches. Data last updated June 6, 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.
Wed 6/128:19 pmPHL - STL
Nonstop2h 27mFrontier
Fri 6/1410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$70
Fri 6/148:19 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$78
Fri 6/148:19 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Tue 6/1811:57 amSTL - PHL
1 stop10h 23mMultiple Airlines
Deal found 6/5$89
Sat 6/1512:51 pmPHL - STL
Nonstop2h 27mMultiple Airlines
Tue 6/2511:57 amSTL - PHL
1 stop24h 17mMultiple Airlines
Deal found 6/6$122
Wed 6/128:27 pmPHL - STL
1 stop19h 05mFrontier
Sat 6/153:08 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$138
Wed 6/128:27 pmPHL - STL
1 stop19h 05mFrontier
Fri 6/1410:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/5$148
Sat 6/152:38 pmPHL - STL
Nonstop2h 27mAmerican Airlines
Tue 6/2512:56 pmSTL - PHL
Nonstop2h 16mAmerican Airlines
Deal found 6/6$151
Thu 6/1310:42 pmPHL - STL
1 stop9h 25mFrontier
Mon 6/1710:36 pmSTL - PHL
Nonstop2h 12mFrontier
Deal found 6/6$165
Fri 6/148:19 pmPHL - STL
Nonstop2h 27mFrontier
Mon 6/177:29 pmSTL - PHL
1 stop10h 09mFrontier
Deal found 6/5$168

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 3,050,429 searches. Data last updated June 6, 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.
Wed 7/38:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 6/5$29
Sat 6/1512:51 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 6/6$30
Fri 6/218:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 6/5$39
Fri 6/288:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 6/6$40
Mon 6/248:19 pmPHL - STL
Nonstop2h 27mFrontier
Deal found 6/5$41
Sat 8/1012:54 pmPHL - STL
Nonstop2h 25mFrontier
Deal found 6/5$43
Wed 9/1112:17 pmPHL - STL
1 stop10h 57mSpirit Airlines
Deal found 6/5$49
Wed 9/116:00 amPHL - STL
2 stops17h 14mSpirit Airlines
Deal found 6/5$63
Thu 6/202:39 pmPHL - STL
Nonstop2h 27mAmerican Airlines
Deal found 6/6$66

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 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$53 - $131

Route

Depart

Return

Price

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 9/11

Nonstop2h 30m

Lambert-St Louis

Sat 9/14

Nonstop2h 13m

$53

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 7/3

Nonstop2h 27m

Lambert-St Louis

Sat 7/6

Nonstop2h 12m

$58

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 8/9

Nonstop2h 24m

Lambert-St Louis

Mon 8/12

Nonstop2h 12m

$65

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 7/10

Nonstop2h 24m

Lambert-St Louis

Mon 7/15

Nonstop2h 12m

$68

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 6/21

Nonstop2h 27m

Lambert-St Louis

Sat 6/29

Nonstop2h 12m

$70

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 9/11

Nonstop2h 30m

Lambert-St Louis

Sat 9/14

1 stop7h 12m

$87

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 9/6

Nonstop2h 30m

Lambert-St Louis

Tue 9/10

1 stop7h 12m

$88

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 9/11

1 stop20h 57m

Lambert-St Louis

Sat 9/14

1 stop7h 12m

$120

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Thu 6/20

Nonstop2h 27m

Lambert-St Louis

Mon 6/24

Nonstop2h 17m

$131

Flights are sorted by cheapest first

Deals found on 6/5

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 May 31, 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.
Search Deals

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 June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Tuesday 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

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.

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

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 June 6, 2024.
To help decide which airline to fly from Philadelphia to St. Louis, see what other customers have to say about Frontier, Delta 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
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

Southwest
8.2
Very good
5,918 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

Delta
8.0
Very good
10,368 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

United Airlines
7.4
Good
10,696 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

American Airlines
7.3
Good
14,227 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

Sun Country Air
7.2
Good
593 reviews
Southwest
8.2
Very good
5,918 reviews

Boarding

8.3

Overall

8.2

Comfort

8.1

Entertainment

7.8

Food

7.3

Crew

8.7

Reviews

1 / 10

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

Related info for your journey

Find useful and relevant information for your journey from 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 24m 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 $53, but on average you can expect to pay $87.

  • 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 $105.

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

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

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

    This flight path from Philadelphia to Lambert-St Louis was viewed by 4 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 $53. Other airlines that can offer you cheap pricing are Spirit Airlines, from $120, and American Airlines, from $131. These flights start at 84% 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 $29. 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 Qatar Airways (73%), Iberia (73%) or British Airways (73%) 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 $155, our data indicates the cheapest price to be $27. The most popular route (Philadelphia - Lambert-St Louis), is priced around $93.

  • 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.

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

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

    Yes, Cheapflights allows you to browse and filter Philadelphia to St. Louis 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 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.

  • Can I find deals for flights from Philadelphia to St. Louis that allow pets onboard?

    Many airlines flying from Philadelphia to St. Louis 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 Philadelphia to St. Louis?

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

    The Philadelphia to St. Louis flight deals you see on this page were last updated on 6/6.

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

    When booking a flight from Philadelphia to St. Louis, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

  • 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 $318). Flying from Philadelphia to St. Louis in July is currently the most expensive (average of $365). 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.

See more FAQs

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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 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$164FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$125Average$189FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$168Average$365FlexibilityNo cancel feeOn-time71%
DeltaCheapest$241Average$394FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$266Average$477FlexibilityNo cancel feeOn-time69%
Detroit to Hawaii flights
Newark Airport to Dallas flights
Boston to Nashville flights
Dallas to London flights
Nashville to Dallas flights
Boston to Austin flights
New York to Hawaii flights
Los Angeles to Fort Lauderdale flights
St. Louis to Los Angeles flights
Boston to Dublin flights
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Philadelphia to London Stansted Airport 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.
First Class
Business Class
Prem Econ Class
Economy 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 June 6, 2024.
3%of flight departuresEarly morningMidnight to 6 am
39%of flight departuresMorning6 am to noon
1%of flight departuresAfternoonNoon to 6 pm
57%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 June 6, 2024.
Sunday3daily flights
Monday4daily flights
Tuesday4daily flights
Wednesday3daily flights
Thursday4daily flights
Friday3daily flights
Saturday4daily flights

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