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St. Louis Lambert International Airport to Philadelphia International Airport flight

Explore the cheapest one-way and round-trip flights from St. Louis Lambert International Airport to Philadelphia International Airport over the next 90 days, with one-way fares from $40 and round-trip from $109. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        STL 6:00 AM
        2h 19m
        Nonstop
        PHL 9:19 AM
        St. Louis - Philadelphia | Mon, Oct 19 | American Airlines
        PHL 10:00 PM
        2h 43m
        Nonstop
        STL 11:43 PM
        Philadelphia - St. Louis | Tue, Oct 20 | American Airlines
        $259 $288
        10% off
        10% off
        $288 $259
      • STL 1:25 PM
        2h 23m
        Nonstop
        PHL 4:48 PM
        St. Louis - Philadelphia | Tue, Sep 29 | American Airlines
        PHL 8:06 PM
        2h 37m
        Nonstop
        STL 9:43 PM
        Philadelphia - St. Louis | Thu, Oct 1 | American Airlines
        $259 $288
        10% off
        10% off
        $288 $259
      • STL 2:29 PM
        7h 49m
        1 stop
        PHL 11:18 PM
        St. Louis - Philadelphia | Wed, Oct 7 | Frontier Airlines
        PHL 8:30 AM
        10h 10m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Wed, Oct 14 | Frontier Airlines
        $109 $288
        62% off
        62% off
        $288 $109
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Mon, Oct 19 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Wed, Oct 21 | Frontier Airlines
        $117
        59% off
        $288 $117
      • STL 6:35 PM
        11h 36m
        1 stop
        PHL 7:11 AM
        St. Louis - Philadelphia | Wed, Oct 14 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Wed, Oct 21 | Frontier Airlines
        $125
        56% off
        $288 $125
      • STL 6:44 PM
        11h 37m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Fri, Oct 30 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Mon, Nov 2 | Frontier Airlines
        $148
        49% off
        $288 $148
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Fri, Oct 23 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Fri, Oct 30 | Frontier Airlines
        $149
        48% off
        $288 $149
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Mon, Oct 12 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Wed, Oct 14 | Frontier Airlines
        $165
        43% off
        $288 $165
      • STL 2:29 PM
        7h 49m
        1 stop
        PHL 11:18 PM
        St. Louis - Philadelphia | Wed, Sep 23 | Frontier Airlines
        PHL 8:41 AM
        5h 29m
        1 stop
        STL 1:10 PM
        Philadelphia - St. Louis | Wed, Sep 30 | Frontier Airlines
        $166
        42% off
        $288 $166
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Fri, Oct 16 | Frontier Airlines
        PHL 8:30 AM
        10h 10m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Mon, Oct 19 | Frontier Airlines
        $183
        36% off
        $288 $183
      • STL 4:30 PM
        6h 13m
        1 stop
        PHL 11:43 PM
        St. Louis - Philadelphia | Sat, Oct 24 | Frontier Airlines
        PHL 12:36 PM
        6h 4m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Wed, Oct 28 | Frontier Airlines
        $193
        33% off
        $288 $193
      • STL 4:26 PM
        6h 16m
        1 stop
        PHL 11:42 PM
        St. Louis - Philadelphia | Sat, Oct 31 | Frontier Airlines
        PHL 12:35 PM
        6h 5m
        1 stop
        STL 5:40 PM
        Philadelphia - St. Louis | Mon, Nov 2 | Frontier Airlines
        $193
        33% off
        $288 $193
      • STL 6:35 PM
        11h 36m
        1 stop
        PHL 7:11 AM
        St. Louis - Philadelphia | Wed, Oct 21 | Frontier Airlines
        PHL 6:00 AM
        11h 58m
        1 stop
        STL 4:58 PM
        Philadelphia - St. Louis | Sun, Oct 25 | Frontier Airlines
        $211
        27% off
        $288 $211
      • STL 5:19 PM
        5h 50m
        1 stop
        PHL 12:09 AM
        St. Louis - Philadelphia | Mon, Sep 28 | Frontier Airlines
        PHL 8:41 AM
        5h 29m
        1 stop
        STL 1:10 PM
        Philadelphia - St. Louis | Fri, Oct 2 | Frontier Airlines
        $217
        25% off
        $288 $217
      • STL 1:00 PM
        17h 25m
        1 stop
        PHL 2:00 PM
        St. Louis - Philadelphia | Tue, Sep 22 | Normal Airline
        PHL 3:00 PM
        6h
        Nonstop
        STL 4:00 PM
        Philadelphia - St. Louis | Thu, Sep 24 | Normal Airline
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      • Cheapest nonstop
        STL 1:15 PM
        2h 15m
        Nonstop
        PHL 4:30 PM
        St. Louis - Philadelphia | Thu, Nov 12 | American Airlines
        $128 $144
        11% off
        11% off
        $144 $128
      • STL 6:30 AM
        2h 20m
        Nonstop
        PHL 9:50 AM
        St. Louis - Philadelphia | Wed, Sep 30 | American Airlines
        $129 $144
        10% off
        10% off
        $144 $129
      • STL 2:29 PM
        7h 49m
        1 stop
        PHL 11:18 PM
        St. Louis - Philadelphia | Wed, Oct 7 | Frontier Airlines
        $40 $144
        72% off
        72% off
        $144 $40
      • STL 2:29 PM
        26h 45m
        1 stop
        PHL 6:14 PM
        St. Louis - Philadelphia | Mon, Oct 5 | Frontier Airlines
        $42
        71% off
        $144 $42
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Mon, Oct 12 | Frontier Airlines
        $44
        69% off
        $144 $44
      • STL 6:35 PM
        11h 36m
        1 stop
        PHL 7:11 AM
        St. Louis - Philadelphia | Wed, Oct 14 | Frontier Airlines
        $45
        69% off
        $144 $45
      • STL 2:29 PM
        15h 47m
        1 stop
        PHL 7:16 AM
        St. Louis - Philadelphia | Wed, Sep 30 | Frontier Airlines
        $45
        69% off
        $144 $45
      • STL 6:35 PM
        27h 36m
        1 stop
        PHL 11:11 PM
        St. Louis - Philadelphia | Fri, Oct 16 | Frontier Airlines
        $50
        65% off
        $144 $50
      • STL 6:35 PM
        27h 36m
        1 stop
        PHL 11:11 PM
        St. Louis - Philadelphia | Fri, Oct 9 | Frontier Airlines
        $50
        65% off
        $144 $50
      • STL 6:35 PM
        11h 46m
        1 stop
        PHL 7:21 AM
        St. Louis - Philadelphia | Fri, Oct 23 | Frontier Airlines
        $59
        59% off
        $144 $59
      • STL 7:20 PM
        26h 51m
        1 stop
        PHL 11:11 PM
        St. Louis - Philadelphia | Tue, Oct 13 | Delta Air Lines
        $78
        46% off
        $144 $78
      • STL 6:00 AM
        16h 11m
        1 stop
        PHL 11:11 PM
        St. Louis - Philadelphia | Wed, Oct 14 | Delta Air Lines
        $78
        46% off
        $144 $78
      • STL 7:20 PM
        26h 51m
        1 stop
        PHL 11:11 PM
        St. Louis - Philadelphia | Tue, Oct 20 | Delta Air Lines
        $79
        45% off
        $144 $79
      • STL 1:00 PM
        17h 25m
        1 stop
        PHL 2:00 PM
        St. Louis - Philadelphia | Tue, Sep 22 | Normal Airline
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Displayed flight fares from St. Louis Lambert International Airport to Philadelphia International Airport are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Which airline offers the cheapest flights from St. Louis Lambert International Airport to Philadelphia International Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Philadelphia International Airport is Frontier Airlines (from $40) among 5 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From $40
Delta Air Lines
From $78
American Airlines
From $128
Hahn Air
From $135
United Airlines
From $170

Find more flights and airlines

What is the flight schedule from St. Louis Lambert International Airport to Philadelphia International Airport?

Check the schedule for flights from St. Louis to Philadelphia and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA1308

    St. Louis Lambert International Airport

    6:30 AM

    STL

    2h 20m

    9:50 AM

    PHL

    - - T W - - S
    Search

  2. AA3049

    St. Louis Lambert International Airport

    5:45 PM

    STL

    2h 22m

    9:07 PM

    PHL

    S - - W T - S
    Search

  3. DL543

    St. Louis Lambert International Airport

    5:30 PM

    STL

    1h 40m

    Nonstop

    8:10 PM

    ATL

    S M T W T F S
    Search

  4. DL2642

    Hartsfield–Jackson Atlanta International Airport

    11:05 PM

    ATL

    1h 59m

    Nonstop

    1:04 AM

    PHL

    S M T W T F S

  5. F92636

    St. Louis Lambert International Airport

    5:19 PM

    STL

    2h 27m

    Nonstop

    8:46 PM

    MCO

    - - - W T - S
    Search

  6. F92508

    Orlando Intl. Airport

    9:36 PM

    MCO

    2h 33m

    Nonstop

    12:09 AM

    PHL

    S M T W T F S

  7. AA4436

    St. Louis Lambert International Airport

    10:45 AM

    STL

    2h 14m

    Nonstop

    1:59 PM

    DCA

    S M T W T - S
    Search

  8. AA4801

    Ronald Reagan Washington National Airport

    5:18 PM

    DCA

    1h 22m

    Nonstop

    6:40 PM

    PHL

    S M T W T - S

  9. DL1571

    St. Louis Lambert International Airport

    10:05 AM

    STL

    1h 34m

    Nonstop

    12:39 PM

    ATL

    S M T W T - S
    Search

  10. DL1329

    Hartsfield–Jackson Atlanta International Airport

    4:07 PM

    ATL

    2h 1m

    Nonstop

    6:08 PM

    PHL

    S M T W T F S

  11. F94474

    St. Louis Lambert International Airport

    12:02 PM

    STL

    1h 44m

    Nonstop

    2:46 PM

    ATL

    S - T - T - -
    Search

  12. F91102

    Hartsfield–Jackson Atlanta International Airport

    9:07 PM

    ATL

    2h 11m

    Nonstop

    11:18 PM

    PHL

    S M T W T F S

  13. UA4601

    St. Louis Lambert International Airport

    8:30 AM

    STL

    1h 35m

    Nonstop

    10:05 AM

    ORD

    S M T W T F S
    Search

  14. UA2430

    O'Hare Intl. Airport

    2:30 PM

    ORD

    2h 24m

    Nonstop

    5:54 PM

    PHL

    S M T W T F S

  15. F94474

    St. Louis Lambert International Airport

    12:02 PM

    STL

    1h 44m

    Nonstop

    2:46 PM

    ATL

    S - T - T - -
    Search

  16. F91004

    Hartsfield–Jackson Atlanta International Airport

    5:10 AM

    ATL

    2h 6m

    Nonstop

    7:16 AM

    PHL

    S M T W T F S

  17. F92636

    St. Louis Lambert International Airport

    5:19 PM

    STL

    2h 27m

    Nonstop

    8:46 PM

    MCO

    - - - W T - S
    Search

  18. F92506

    Orlando Intl. Airport

    6:30 AM

    MCO

    2h 35m

    Nonstop

    9:05 AM

    PHL

    - M T W T F S
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About St. Louis Lambert International Airport and Philadelphia International Airport

Learn about St. Louis Lambert International Airport (STL) and Philadelphia International Airport (PHL) — including location, terminals, transportation, and travel tips.

Flight distance1,307.06 km
Cheapest one-way ticket price$40
Cheapest return ticket price$109

FAQs for St. Louis Lambert International Airport to Philadelphia International Airport Flights

  • How long is the flight from St. Louis Lambert International Airport to Philadelphia International Airport?

    St. Louis Lambert International Airport to Philadelphia International Airport takes about 1 hour 55 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 3 daily flights from St. Louis Lambert International Airport (STL) to Philadelphia International Airport (PHL).
  • The earliest flight from St. Louis Lambert International Airport to Philadelphia International Airport departs at 06:30, and the last departs at 19:35, with about 9 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from St. Louis Lambert International Airport (STL) to Philadelphia International Airport (PHL) is quite popular. Without considering departure times or holidays, tickets cost around $279 in November, the most expensive month to book this route.
  • The earliest flight departs from St. Louis Lambert International Airport (STL) at 06:00 and arrives in Philadelphia International Airport (PHL) at 09:18.
  • The latest flight departs from St. Louis Lambert International Airport (STL) at 17:14 and arrives in Philadelphia International Airport (PHL) at 20:25.
  • American Airlines is a very popular airline operating an average of 697 flights per month.
  • One-way flights from St. Louis Lambert International Airport to Philadelphia International Airport currently start from $40, and round-trip fares start from $109. The current lowest fare is a Frontier Airlines flight departing on Wed, Oct 7; prices may vary depending on availability.
  • Yes. American Airlines operate direct flights from St. Louis Lambert International Airport to Philadelphia International Airport, with an average flight time of 1 hour 50 minutes, and around 31 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from St. Louis Lambert International Airport to Philadelphia International Airport is $191. Prices may vary depending on the departure date, airline, and availability.
  • St. Louis Lambert International Airport to Philadelphia International Airport operates around 21 weekly flights, mainly by American Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter St. Louis Lambert International Airport and Philadelphia International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Popular Destinations

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.