Cheap Flights from Philadelphia, PA to Key West, FL from $121

Page navigation
Price Calendar Cheap Flights Flights Schedule

On Cheapflightsplus.com you will find 164 connecting flights from Philadelphia to Key West. You can compare airfare deals from 3 airlines and multiple travel sites from $121, book and save on cheap plane tickets and last minute offers. Also check out PHL-EYW flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Philadelphia to Key West Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $121 (one-way), $208 (round-trip).
Direct flights
  • Check to choose departure date Check to choose departure date
Check prices for return flight
Find flights

Best Flights from Philadelphia to Key West Today

Take a look at the list of non stop flights and flights with layovers from Philadelphia to Key West with the lowest price of $121. Take a look at the list of flights with layovers from Philadelphia to Key West from $121. There’re no direct flights. The fastest connecting flight – 6h 52m.
Price Departure Arrival Flight Duration Airline Flight
from $121
Find flight
20:15
Philadelphia
Philadelphia Int.
 09:42+1 день
Key West
Key West Int.
 13h 27m
layover
9h 35m - Sanford
 Spirit Airlines
NK2276
G42861
from $173
Find flight
15:03
Philadelphia
Philadelphia Int.
 09:42+1 день
Key West
Key West Int.
 18h 39m
layover
14h 45m - Sanford
 Spirit Airlines
NK2842
G42861
from $137
Find flight
17:11
Philadelphia
Philadelphia Int.
 14:44+1 день
Key West
Key West Int.
 21h 33m
layover
0h 47m - Charlotte
16h 10m - Clearwater
 Spirit Airlines
NK1128
NK1295
G41048
from $158
Find flight
18:18
Philadelphia
Philadelphia Int.
 14:10+1 день
Key West
Key West Int.
 19h 52m
layover
0h 33m - Miami
14h 0m - Sanford
 Spirit Airlines
NK877
NK676
G41340
Show all tickets
*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on September 15, 2025
Full flight schedule will help you in detecting at what time planes fly from Philadelphia to Key West. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
06:10 — 09:12
+1 day
06:10 — 09:03 NK1005 Spirit Airlines
Philadelphia — Miami
6h 2m stop
15:05 — 16:10 NK322 Spirit Airlines
Miami — Clearwater
16h stop
08:10 — 09:12 G4973 Allegiant Air
Clearwater — Key West
27h 2m
including layover
Find flight
from$161
06:15 — 09:43
+1 day
06:15 — 08:51 NK3996 Spirit Airlines
Philadelphia — Sanford
23h 41m stop
08:32 — 09:43 G42877 Allegiant Air
Sanford — Key West
27h 28m
including layover
Find flight
from$178
15:03 — 09:42
+1 day
15:03 — 17:45 NK2842 Spirit Airlines
Philadelphia — Sanford
14h 45m stop
08:30 — 09:42 G42861 Allegiant Air
Sanford — Key West
18h 39m
including layover
Find flight
from$173
17:11 — 14:44
+1 day
17:11 — 19:00 NK1128 Spirit Airlines
Philadelphia — Charlotte
47m stop
19:47 — 21:30 NK1295 Spirit Airlines
Charlotte — Clearwater
16h 10m stop
13:40 — 14:44 G41048 Allegiant Air
Clearwater — Key West
21h 33m
including layover
Find flight
from$137
17:32 — 08:04
+1 day
17:32 — 19:26 NK2268 Spirit Airlines
Philadelphia — Detroit
2h 30m stop
21:56 — 00:39 NK2676 Spirit Airlines
Detroit — Clearwater
6h 21m stop
07:00 — 08:04 G4971 Allegiant Air
Clearwater — Key West
14h 32m
including layover
Find flight
from$169
18:18 — 14:10
+1 day
18:18 — 21:15 NK877 Spirit Airlines
Philadelphia — Miami
33m stop
21:48 — 23:00 NK676 Spirit Airlines
Miami — Sanford
14h stop
13:00 — 14:10 G41340 Allegiant Air
Sanford — Key West
19h 52m
including layover
Find flight
from$158
18:18 — 09:12
+1 day
18:18 — 21:15 NK877 Spirit Airlines
Philadelphia — Miami
44m stop
21:59 — 23:06 NK1954 Spirit Airlines
Miami — Clearwater
9h 4m stop
08:10 — 09:12 G4973 Allegiant Air
Clearwater — Key West
14h 54m
including layover
Find flight
from$161
18:18 — 17:01
+1 day
18:18 — 21:15 NK877 Spirit Airlines
Philadelphia — Miami
33m stop
21:48 — 23:00 NK676 Spirit Airlines
Miami — Sanford
16h 51m stop
15:51 — 17:01 G41349 Allegiant Air
Sanford — Key West
22h 43m
including layover
Find flight
from$166
18:47 — 14:10
+1 day
18:47 — 21:31 NK3161 Spirit Airlines
Philadelphia — Sanford
15h 29m stop
13:00 — 14:10 G41340 Allegiant Air
Sanford — Key West
19h 23m
including layover
Find flight
from$123
18:47 — 13:07
+1 day
18:47 — 21:31 NK3161 Spirit Airlines
Philadelphia — Orlando
14h 21m stop
11:52 — 13:07 MX162 Mexicana
Orlando — Key West
18h 20m
including layover
Find flight
from$185
19:05 — 13:07
+1 day
19:05 — 21:48 NK1566 Spirit Airlines
Philadelphia — Orlando
14h 4m stop
11:52 — 13:07 MX162 Mexicana
Orlando — Key West
18h 2m
including layover
Find flight
from$184
19:12 — 09:40
+1 day
19:12 — 21:54 NK2276 Spirit Airlines
Philadelphia — Sanford
10h 36m stop
08:30 — 09:40 G42859 Allegiant Air
Sanford — Key West
14h 28m
including layover
Find flight
from$124
19:12 — 16:45
+1 day
19:12 — 21:54 NK2276 Spirit Airlines
Philadelphia — Orlando
11h 57m stop
09:51 — 12:20 NK2480 Spirit Airlines
Orlando — Indianapolis
1h 46m stop
14:06 — 16:45 G41335 Allegiant Air
Indianapolis — Key West
21h 33m
including layover
Find flight
from$185
20:15 — 09:42
+1 day
20:15 — 22:55 NK2276 Spirit Airlines
Philadelphia — Sanford
9h 35m stop
08:30 — 09:42 G42861 Allegiant Air
Sanford — Key West
13h 27m
including layover
Find flight
from$121
20:15 — 09:43
+1 day
20:15 — 22:55 NK2276 Spirit Airlines
Philadelphia — Sanford
9h 37m stop
08:32 — 09:43 G42877 Allegiant Air
Sanford — Key West
13h 28m
including layover
Find flight
from$126
*Departure and arrival times - local. Updated on September 15, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Philadelphia to Key West depends on and how to choose the most interesting flight option for you.

Distance between Philadelphia and Key West is 1809 miles. Time difference between the cities is 0h. Airplanes depart 05:45 to 20:15 from 4 Philadelphia airports and arrive 05:45 to 20:15 to 2 Key West airports. Average flight time is 23h 20m.

  • The fastest flight 6h 52m
  • Average flight time 23h 20m
  • The earliest flight 05:45
  • The latest flight 20:15
  • Distance 1125 ml

The cheapest months to travel to Key West are june (from 121 $), august (from 123 $), may (from 124 $).

The most expensive months are september (from 304 $), october (from 161 $), july (from 126 $).

What is the lowest airfare Philadelphia to Key West?

The cheapest plane ticket found by our users is $121. This airfare is for economy class on one-way NK2276 flight by Spirit Airlines for June 28, 2025 which leaves Philadelphia Int. in Philadelphia at 20:15 am and arrives at Key West Key West Int. at 09:42.

Economy class
$121
Find
Business class
?
Find
First class
?
Find

Popular Airlines on the Route

The flight Philadelphia — Key West is served by 3 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Sun Country Airlines - 7 departures per week at the price of from $ 236 . And the most expensive tickets are offered by United Airlines airline - from $ 1317.

Direct flights

There’re no direct flights on this route. Try flights with stops.

Connecting Flights

There are 164 flights with layovers on the route. The fastest connecting flight is NK3996 by Spirit Airlines takes 6h 52m and the cheapest is NK2276 by Spirit Airlines for $121.

  • SY - Sun Country Airlines
    from $236
    Find
  • UA - United Airlines
    from $213
    Find
  • NK - Spirit Airlines
    from $121
    Find
See more connecting flights

Airports

You can fly from Philadelphia to Key West from 4 airports (Philadelphia Int., North Philadelphia, Mustin Alf, Philadelphia Sea Plane Base).

Philadelphia airports

  • Philadelphia Int.-PHL
    from $121
    Find
  • North Philadelphia-PNE
    Find
  • Mustin Alf-MUV
    Find
  • Philadelphia Sea Plane Base-PSQ
    Find

Key West airports

  • NAS-NQX
    Find
  • Key West Int.-EYW
    Find

Airplanes

There are flights to Key West from Philadelphia by 3 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Philadelphia

You may also consider searching for discounted plane tickets to some other popular places from Philadelphia within United States.

Top International Destinations from Philadelphia

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

Back