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Cheap flights from Philadelphia to St. Louis

Philadelphia
PHL
St. Louis
STL

Flight deals from Philadelphia to St. Louis

Below you can see the best deals on flights Philadelphia — St. Louis for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 4 August, from $65.

Top 10 cheap flights from Philadelphia to St. Louis

About the Philadelphia — St. Louis flight

On this page, you can find and purchase flight tickets for the Philadelphia — St. Louis route. Flights over a distance of 1,304 km are operated regularly, with about 9 flights available per week, allowing you to choose a convenient departure time.

The main airlines on this route are American Airlines and Iberia. Ticket prices are dynamic, so to find the best deal, we recommend using the price chart and checking the information on how to get to Philadelphia airport and how to get from St. Louis airport.

Flight ticket prices by day: Philadelphia — St. Louis

Below is a calendar of the lowest flight ticket prices for Philadelphia — St. Louis by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $65 in ,, and the most expensive are around $241 in J. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Philadelphia → St. Louis, average one-way price

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$179mediumMay$239highSep$156low
Feb$169lowJun$214highOct$169low
Mar$189mediumJul$219highNov$204medium
Apr$199mediumAug$164lowDec$234high

Some values are estimated based on seasonality.

When to fly

The warmest month in St. Louis is July, with an average high temperature of 31.4°C, while the wettest is May, which sees up to 122.67 mm of precipitation. January experiences the lowest temperatures, dropping to -3.1°C.

The lowest airfare was recorded in August, starting $84. The peak period for flight costs is January, when prices rise to $240.

September is the most balanced month for a trip: with moderate rainfall and a comfortable temperature of 27.8°C, ticket prices start $135. It is advisable to avoid flying in January due to high costs and cold weather.

Temperature · St. Louis

Dry and wet days · St. Louis

Wind speed and direction · St. Louis

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How to get the best deal on a Philadelphia — St. Louis ticket

  • Use the low-price calendar on this page to compare ticket costs for nearby dates, as mid-week departures are often cheaper.
  • Monitor the price dynamics chart to catch the moment of lowest cost, which for this route starts $84.
  • Book your tickets in advance, ideally 4–6 weeks before your trip, especially if you plan to fly with American Airlines during the peak summer season.
  • Compare fares with and without checked baggage; for a short flight of 1,304 km, carry-on luggage might be enough to save on costs.

Airlines

On the Philadelphia — St. Louis route, regular flights are operated by American Airlines and Iberia. There are approximately 9 flights per week, with American Airlines being the primary carrier providing the highest frequency of departures. Detailed information about the schedule by day of the week and specific flights can be found in the list below.

  • American AirlinesAA
    9x/week
    WebsiteFleet: 965211M pax/year
    • Direct flight PHL → STL9x/week
      Duration
      2h 36m
      Days
      MTWTFSS
    96.3%Open →
  • IberiaIB
    1x/week
    WebsiteFleet: 9224M pax/year
    • Direct flight PHL → STL1x/week
    3.7%Open →

Cities and airports on the Philadelphia — St. Louis route

Flights Philadelphia — St. Louis depart from Philadelphia International Airport and Trenton-Mercer Airport and arrive at Lambert-St. Louis International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Philadelphia

PHL
United States
About the cityHow to get thereWeatherAll about the country United States
Arrival

St. Louis

STL
United States
About the cityHow to get thereWeatherAll about the country United States
Departure airports
Arrival airports

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Frequently asked questions about the Philadelphia — St. Louis flight

How long is the flight from Philadelphia to St. Louis?

The distance between the cities is 1,304 km. A direct flight usually takes about 2 hours, depending on weather conditions and the specific flight.

Which airlines fly this route?

Regular flights between Philadelphia and St. Louis are operated by American Airlines and Iberia.

Are there direct flights?

Yes, direct flights are available on this route, allowing you to reach your destination without any layovers.

How much is the cheapest ticket?

Ticket prices change constantly based on the departure date and demand. The current minimum prices for the coming months are shown in the calendar on this page.

Which airport does the flight arrive at?

Flights from Philadelphia (PHL) arrive at St. Louis Lambert International Airport (STL).

Where else you can fly from Philadelphia

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AtlantaChicagoBostonOrlandoFort LauderdaleMiamiTorontoDetroitCharlotteWashington, D.C.RaleighDallasLos AngelesPhoenixDenverMinneapolisSan JuanPittsburghSeattleNashvilleMontrealColumbusClevelandTampaIndianapolisSan FranciscoNorfolkCincinnatiHoustonLas VegasHarrisburgJacksonvilleRichmondHartfordSouth PortlandAlbanyCancunKansas CityRochesterPunta Cana

Where else you can fly from St. Louis

See all
ChicagoDallasNew York CityAtlantaSeattleMinneapolisTorontoDenverHoustonCharlotteWashington, D.C.DetroitBostonPortlandOrlandoPhoenixMiamiSalt Lake CityMontrealLos AngelesLas VegasCancunFort LauderdaleJonesboroSan FranciscoLondonTampaFrankfurt am MainPunta CanaQuincy

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