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Latest Flight Deals from St. Louis to Philadelphia

Book one-way or return flights from St. Louis to Philadelphia from as little as NZD 57. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • STL08:47
        2h 14m
        Direct
        PHL12:01
        Wed, May 22|St. Louis - Philadelphia|Frontier Airlines
        NZD 57NZD 116
        51% OFF
        51% OFF
        NZD 116NZD 57
      • STL08:47
        2h 14m
        Direct
        PHL12:01
        Wed, May 29|St. Louis - Philadelphia|Frontier Airlines
        NZD 63NZD 116
        46% OFF
        46% OFF
        NZD 116NZD 63
      • STL15:08
        2h 14m
        Direct
        PHL18:22
        Sat, Jun 29|St. Louis - Philadelphia|Frontier Airlines
        NZD 64NZD 116
        45% OFF
        45% OFF
        NZD 116NZD 64
      • STL15:32
        2h 13m
        Direct
        PHL18:45
        Wed, Jun 12|St. Louis - Philadelphia|Frontier Airlines
        NZD 64
        NZD 64
      • STL22:36
        2h 14m
        Direct
        PHL01:50
        Wed, Jun 5|St. Louis - Philadelphia|Frontier Airlines
        NZD 64
        NZD 64
      • STL11:47
        2h 13m
        Direct
        PHL15:00
        Sat, Jun 8|St. Louis - Philadelphia|Frontier Airlines
        NZD 67
        NZD 67
      • STL22:36
        2h 14m
        Direct
        PHL01:50
        Mon, Jun 17|St. Louis - Philadelphia|Frontier Airlines
        NZD 79
        NZD 79
      • STL19:23
        10h 16m
        1 stop
        PHL06:39
        Thu, May 16|St. Louis - Philadelphia|Frontier Airlines
        NZD 82
        NZD 82
      • STL20:04
        8h 30m
        1 stop
        PHL05:34
        Sat, May 18|St. Louis - Philadelphia|Frontier Airlines
        NZD 82
        NZD 82
      • STL20:04
        8h 41m
        1 stop
        PHL05:45
        Sat, May 4|St. Louis - Philadelphia|Frontier Airlines
        NZD 86
        NZD 86
      • STL13:00
        3h 5m
        Direct
        PHL14:00
        Mon, May 6|St. Louis - Philadelphia|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from St. Louis to Philadelphia? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Philadelphia. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from St. Louis to Philadelphia

View airlines operating flights from St. Louis to Philadelphia. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From NZD 57
American Airlines
From NZD 131
Delta Air Lines
From NZD 150
Sun Country Airlines
From NZD 157
United Airlines
From NZD 177
Spirit Airlines
From NZD 186
Southern Airways Express
From NZD 249
Southwest Airlines
From NZD 277
Alaska Airlines
From NZD 364
ANA airlines

Find more flights and airlines

Alternative Routes from St. Louis to Philadelphia

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Philadelphia.

  • Cheapest
    Frontier Airlines
    STL
    08:47
    2h 14m
    Direct
    PHL
    12:01
    St. Louis Lambert International Airport - Philadelphia International Airport
    Wed, May 22Frontier Airlines
    NZD 57
  • Frontier Airlines
    STL
    21:53
    8h 50m
    1 transfer
    TTN
    07:43
    St. Louis Lambert International Airport - Trenton Mercer Airport
    Wed, May 8Frontier Airlines
    NZD 87
  • Frontier Airlines
    STL
    21:53
    8h 50m
    1 transfer
    TTN
    07:43
    St. Louis Lambert International Airport - Trenton Mercer Airport
    Wed, May 8Frontier Airlines
    NZD 87
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from St. Louis (STL) to Philadelphia (PHL) the cheapest?

    Airlines adjust prices for flights from St. Louis to Philadelphia based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Philadelphia (PHL) cost?

    According to Trip.com's data, the lowest price is around NZD 486.

  • How long does it take to fly from St. Louis (STL) to Philadelphia (PHL) and what is the distance?

    It takes around 2 hours 11 minutes to fly from St. Louis (STL) to Philadelphia (PHL).

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

    Airlines with flights from St. Louis (STL) to Philadelphia (PHL): American Airlines, Southwest Airlines, Qatar Airways, Aer Lingus and British Airways.

How to find a cheap flight from St. Louis to Philadelphia

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Philadelphia. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from St. Louis to Philadelphia

Cheapest nonstop flight price

NZD 57

Cheapest round-trip ticket price

NZD 126

Off-season for travel

May

Peak season for travel

October

Flight distance

1,293.47km

Average flight time

2 hours 11 minutes

Popular airline

American Airlines

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