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Philadelphia International Airport to St. Louis flight
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Cheap Flights from Philadelphia International Airport to St. Louis

Search for flights from Philadelphia International Airport to St. Louis and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • PHL06:30
        2h 27m
        Direct
        STL07:57
        Philadelphia - St. Louis|Wed, May 22|Frontier Airlines
        CAD 37CAD 78
        52% OFF
        52% OFF
        CAD 78CAD 37
      • PHL06:30
        2h 27m
        Direct
        STL07:57
        Philadelphia - St. Louis|Wed, May 29|Frontier Airlines
        CAD 39CAD 78
        50% OFF
        50% OFF
        CAD 78CAD 39
      • PHL06:30
        2h 27m
        Direct
        STL07:57
        Philadelphia - St. Louis|Sat, May 25|Frontier Airlines
        CAD 39CAD 78
        50% OFF
        50% OFF
        CAD 78CAD 39
      • PHL06:30
        2h 27m
        Direct
        STL07:57
        Philadelphia - St. Louis|Sat, Jun 1|Frontier Airlines
        CAD 52
        CAD 52
      • PHL12:51
        2h 27m
        Direct
        STL14:18
        Philadelphia - St. Louis|Sat, Jun 29|Frontier Airlines
        CAD 52
        CAD 52
      • PHL20:19
        2h 27m
        Direct
        STL21:46
        Philadelphia - St. Louis|Wed, Jun 19|Frontier Airlines
        CAD 52
        CAD 52
      • PHL09:17
        2h 30m
        Direct
        STL10:47
        Philadelphia - St. Louis|Sat, Jun 8|Frontier Airlines
        CAD 52
        CAD 52
      • PHL12:51
        2h 27m
        Direct
        STL14:18
        Philadelphia - St. Louis|Sat, Jun 22|Frontier Airlines
        CAD 55
        CAD 55
      • PHL20:19
        2h 27m
        Direct
        STL21:46
        Philadelphia - St. Louis|Wed, Jun 26|Frontier Airlines
        CAD 56
        CAD 56
      • PHL20:19
        2h 27m
        Direct
        STL21:46
        Philadelphia - St. Louis|Wed, Jun 5|Frontier Airlines
        CAD 56
        CAD 56
      • PHL13:00
        3h 5m
        Direct
        STL14:00
        Philadelphia - St. Louis|Wed, May 8|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.

Selected Airlines from Philadelphia International Airport to St. Louis

See which airlines fly from Philadelphia International Airport to St. Louis. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

Frontier Airlines
From CAD 37
Spirit Airlines
From CAD 93
American Airlines
From CAD 115
Delta Air Lines
From CAD 120
Sun Country Airlines
From CAD 128
United Airlines
From CAD 163
Southwest Airlines
From CAD 267
Alaska Airlines
From CAD 377
ANA airlines
Find more flights and airlines

Find Suitable Airport in St. Louis

Learn about different airports in St. Louis, find the best flight and transfer options, and plan your journey.

  • 21.12 km from central St. Louis
    St. Louis Lambert International Airport
    Tickets From
    CAD 37
Flight Schedule from Philadelphia International Airport to St. Louis

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL2455

    Delta Air Lines

    06:00

    PHL

    1.7h

    07:42

    DTW

    -MT----
    Search

  2. DL2868

    Delta Air Lines

    08:50

    DTW

    1.9h

    09:43

    STL

    -MT----

  3. NK3996

    Spirit Airlines

    06:21

    PHL

    2.7h

    09:04

    MCO

    SMTWTFS
    Search

  4. F91631

    Frontier Airlines

    19:07

    MCO

    2.8h

    20:53

    STL

    SMTWTFS

  5. AA2275

    American Airlines

    10:50

    PHL

    2.6h

    Direct

    12:27

    STL

    -MT----
    Search

  6. F91807

    Frontier Airlines

    11:32

    PHL

    2.7h

    14:13

    MCO

    SMTWTFS
    Search

  7. F91631

    Frontier Airlines

    19:07

    MCO

    2.8h

    20:53

    STL

    SMTWTFS

  8. F92609

    Frontier Airlines

    14:35

    PHL

    3.0h

    17:32

    FLL

    SMTWTFS
    Search

  9. NK1724

    Spirit Airlines

    15:41

    FLL

    3.0h

    17:39

    STL

    -M-W-FS

  10. F93265

    Frontier Airlines

    17:51

    PHL

    4.2h

    20:05

    DEN

    SMTWTFS
    Search

  11. F9006

    Frontier Airlines

    07:00

    DEN

    2.1h

    10:05

    STL

    S-T-TF-

  12. AA2571

    American Airlines

    18:30

    PHL

    2.6h

    Direct

    20:04

    STL

    SMTWTFS
    Search

  13. F93855

    Frontier Airlines

    20:13

    PHL

    2.7h

    22:57

    MCO

    SMTWTFS
    Search

  14. F91631

    Frontier Airlines

    19:07

    MCO

    2.8h

    20:53

    STL

    SMTWTFS
Find more flights and airlines

Flight Info of Flights from Philadelphia International Airport to St. Louis

Cheapest return ticket price

CAD 92

Cheapest direct flight price

CAD 37

Cheapest month

May

Peak season for travel

July

FAQs for Philadelphia International Airport to St. Louis Flights

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