Cheap flights from Philadelphia to Key West International

Compare Philadelphia to Key West International flight deals

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Flight deals from Philadelphia to Key West International

Looking for a cheap last-minute deal or the best round-trip flight from Philadelphia to Key West International Airport? If you want to travel next month, round-trip fares start from $188. Find the lowest prices on one-way and round-trip tickets right here.

Key West.$178 per passenger.Departing Sun, Aug 16, returning Thu, Aug 27.Round-trip flight with Allegiant Air and Breeze Airways.Outbound indirect flight with Allegiant Air, departing from Philadelphia International on Sun, Aug 16, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Thu, Aug 27, arriving in Philadelphia International.Price includes taxes and charges.From $178, select.

Key West.$188 per passenger.Departing Sat, Jun 6, returning Fri, Jun 12.Round-trip flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departing from Philadelphia Trenton-Mercer on Sat, Jun 6, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Fri, Jun 12, arriving in Philadelphia Trenton-Mercer.Price includes taxes and charges.From $188, select.

Key West.$234 per passenger.Departing Wed, May 27, returning Fri, Jun 12.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Wed, May 27, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Fri, Jun 12, arriving in Philadelphia International.Price includes taxes and charges.From $234, select.

Key West.$237 per passenger.Departing Sun, Jul 12, returning Fri, Jul 17.Round-trip flight with Allegiant Air and Breeze Airways.Outbound indirect flight with Allegiant Air, departing from Philadelphia International on Sun, Jul 12, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Fri, Jul 17, arriving in Philadelphia International.Price includes taxes and charges.From $237, select.

Key West.$238 per passenger.Departing Sat, Jul 25, returning Sat, Aug 8.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Jul 25, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Sat, Aug 8, arriving in Philadelphia International.Price includes taxes and charges.From $238, select.

Key West.$259 per passenger.Departing Wed, Aug 19, returning Wed, Sep 2.Round-trip flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Wed, Aug 19, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Wed, Sep 2, arriving in Philadelphia International.Price includes taxes and charges.From $259, select.

Key West.$294 per passenger.Departing Wed, May 27, returning Sun, May 31.Round-trip flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departing from Philadelphia Trenton-Mercer on Wed, May 27, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Sun, May 31, arriving in Philadelphia Trenton-Mercer.Price includes taxes and charges.From $294, select.

Key West.$297 per passenger.Departing Tue, Jun 30, returning Mon, Aug 3.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Jun 30, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Mon, Aug 3, arriving in Philadelphia International.Price includes taxes and charges.From $297, select.

Key West.$310 per passenger.Departing Thu, Oct 1, returning Sun, Oct 4.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Oct 1, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Sun, Oct 4, arriving in Philadelphia International.Price includes taxes and charges.From $310, select.

Key West.$318 per passenger.Departing Tue, Jun 30, returning Tue, Jul 7.Round-trip flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Jun 30, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Tue, Jul 7, arriving in Philadelphia International.Price includes taxes and charges.From $318, select.

Key West.$319 per passenger.Departing Thu, Sep 24, returning Sun, Sep 27.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Sep 24, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Sun, Sep 27, arriving in Philadelphia International.Price includes taxes and charges.From $319, select.

Key West.$348 per passenger.Departing Sat, Sep 19, returning Sat, Oct 3.Round-trip flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Sep 19, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Sat, Oct 3, arriving in Philadelphia International.Price includes taxes and charges.From $348, select.

Key West.$409 per passenger.Departing Thu, Nov 12, returning Mon, Nov 16.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Nov 12, arriving in Key West International.Inbound indirect flight with Allegiant Air, departing from Key West International on Mon, Nov 16, arriving in Philadelphia International.Price includes taxes and charges.From $409, select.

Key West.$428 per passenger.Departing Sat, Oct 31, returning Wed, Nov 4.Round-trip flight with Frontier Airlines and Breeze Airways.Outbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, Oct 31, arriving in Key West International.Inbound indirect flight with Breeze Airways, departing from Key West International on Wed, Nov 4, arriving in Philadelphia International.Price includes taxes and charges.From $428, select.

Key West.$439 per passenger.Departing Wed, Jun 24, returning Wed, Jul 1.Round-trip flight with American Airlines.Outbound direct flight with American Airlines departing from Philadelphia International on Wed, Jun 24, arriving in Key West International.Inbound direct flight with American Airlines departing from Key West International on Wed, Jul 1, arriving in Philadelphia International.Price includes taxes and charges.From $439, select.

Key West.$500 per passenger.Departing Fri, Dec 18, returning Tue, Dec 22.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Philadelphia International on Fri, Dec 18, arriving in Key West International.Inbound indirect flight with Delta, departing from Key West International on Tue, Dec 22, arriving in Philadelphia International.Price includes taxes and charges.From $500, select.

Find the cheapest month to fly from Philadelphia to Key West International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia to Key West International flights are currently cheapest in August.

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Direct flights from Philadelphia to Key West International

Philadelphia to Key West International: Alternative routes

Compare routes from Philadelphia to Key West below. You may find an airport to fly into that's cheaper, faster, or easier than Key West International.

Key West International

5km from central Key West

ClosestCheapest

from $178

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Philadelphia to Key West: Flight information

The things to know before you go.

Cheapest flight found	$179
Cheapest month to fly	August
Average flight time	3 hrs, 20 mins
Most popular airline	American Airlines
Average flights per week	28

Finding cheap flights from Philadelphia to Key West International: Frequently asked questions

How much are round-trip flights from Philadelphia to Key West International?

The best price we found for a round-trip flight from Philadelphia to Key West International is $179. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Philadelphia to Key West International?

3 hours and 20 minutes is the average flight time from Philadelphia to Key West International.

Which airlines fly direct from Philadelphia to Key West International?

American Airlines, Qatar Airways and Republic Airways fly direct from Philadelphia to Key West International.

How many flights are there a week from Philadelphia to Key West International?

There are 56 flights per week flying from Philadelphia to Key West International, as of May 2026.

When is the cheapest time to fly from Philadelphia to Key West International?

The cheapest month to fly from Philadelphia to Key West International is usually August.

Which upcoming date is cheapest to fly from Philadelphia to Key West International Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Key West International Airport on Sunday, August 16, 2026.

Can I get a direct flight from Philadelphia to Key West International Airport?

Yes – the average flight time is 3 hours and 20 minutes.

How can I find the best flight deal to Key West International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Key West International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

Flying from Philadelphia to Key West International Airport (EYW): What you need to know

Start planning your trip by looking up the most convenient place to catch your flight from Philadelphia to Key West International Airport (EYW). Explore the options for taking off from Philadelphia International Airport (PHL) or Trenton-Mercer Airport (TTN), two of the city's main airports.
The average duration of a direct Philadelphia to Key West International Airport flight is 3 hours 15 minutes.
Key West (where Key West International Airport is located) and Philadelphia share the UTC-4 timezone. With no time difference, coordinating plans between the cities is hassle-free.
Philadelphia International Airport (PHL) to Key West International Airport (EYW) is the most popular route. There are 11 direct departures a week to pick from. If you have things to do before leaving, hop on the last flight with American Airlines at 12:35pm. Go for the first PHL to EYW departure operated by American Airlines at 8:15am if you'd rather get going earlier.
Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Be at the airport with enough time to catch your flight from Philadelphia to EYW.
In high season, allow for longer wait times and get there earlier. Aim for at least two hours ahead for domestic flights and up to four hours for international journeys.

Airports in Philadelphia

Philadelphia International Airport (PHL)

Get there in one go from Philadelphia International Airport (PHL). Nonstop flights from Philadelphia to Key West International Airport (EYW) are available from here.
You can get away on a direct flight from Philadelphia to Key West International Airport with American Airlines. This popular carrier operates services from PHL.
The airline most travelers choose when flying between PHL and EYW is American Airlines.
With 75.65% of its services arriving as scheduled, American Airlines is the highest-rated carrier for punctuality on this route.
PHL is about 19 kilometers from central Philadelphia. If you're driving, catching a cab or ride-sharing from the center, it'll take 15 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the trip time to be around 45 minutes.
Searching for a convenient hotel close to Philadelphia International Airport? If you're catching an early flight from Philadelphia to Key West International Airport, these accommodation options will put you moments from your check-in counter:
78.93% of flights that take off from Philadelphia International Airport land at their destination on time.
You'll find PHL at 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

TTN is around 56 kilometers from central Philadelphia. It takes 40 minutes or so to get to the airport by car from the city center. Public transport takes approximately 1 hour 45 minutes.
Catching an early morning flight? Think about staying at one of these hotels near Trenton-Mercer Airport the day before your Philadelphia to EYW flight:
Trenton-Mercer Airport has earned its reputation for punctuality. 82.45% of flights out of here arrive right when they're supposed to.
You'll find TTN at Scotch Road, Terminal Building.

About Key West International Airport (EYW)

Have a late flight from Philadelphia to Key West International Airport? Don't let your travel day stretch into tomorrow. Stay at one of these hotels near EYW and give yourself a well-earned lights-out:
Pick up a Key West International Airport rental car and discover Key West and beyond with your own set of wheels. Dollar, Alamo and Budget are top outlets to choose from here.
Booking your vehicle around two weeks in advance of your Philadelphia to Key West International Airport flight can help you lock in a great deal.
The address for EYW is 3491 South Roosevelt Boulevard.

Getting from Key West International Airport (EYW) to central Key West

From Key West International Airport, central Key West is around 3 kilometers away. It takes about 5 minutes to get to the city center by car.
Traveling by public transport takes roughly 40 minutes.

How to find the cheapest flights from Philadelphia to Key West International Airport (EYW)

$87 is the lowest price for a one-way ticket from Philadelphia to Key West International Airport. A return flight starts at $179. These prices may change based on demand.
Get cheap flights from Philadelphia to EYW by booking two months ahead. According to our research, that's the ideal time frame for landing a bargain.
The best month for scoring cheap Philadelphia to Key West International Airport tickets is July. Use the 'Whole month' tool to compare flight prices, then choose the dates that offer the biggest savings.
You don't need to search every day to find out if fares have dropped when you set up a Price Alert. We'll let you know the moment there's a better deal on plane tickets from Philadelphia to EYW.
Save on your flight from Philadelphia to Key West International Airport by using filters. Choose your preferred times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Philadelphia to Key West International Airport (EYW)

July is the most popular month for flights from Philadelphia to Key West International Airport (EYW). Plan your visit to Key West in February for a more laid-back experience.
Book a Philadelphia to EYW plane ticket departing in August if you want to experience the city during its warmest month. Expect temperatures in Key West to range from 26ºC (79ºF) to 30ºC (86ºF).
Look for cheap tickets from Philadelphia to Key West International Airport in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between 18ºC (64ºF) and 23ºC (73ºF).

More about Key West

Start your Key West trip right by choosing the perfect place to stay. As soon as you've booked your flight from Philadelphia to Key West International Airport, check out our range of accommodation options including:
South Beach and Mallory Square are just a couple of the top attractions to put on your Key West travel itinerary. Keep the sightseeing going at Dry Tortugas.

Explore more of the United States

You've done Key West, now it's time to discover more of the United States. Travel around 209 kilometers north-east to Miami to check off its top sights. From Ocean Drive to Beach and La Playa De Miami, there's plenty to keep you on the go.
Hialeah is another must-experience destination in the United States and is around 209 kilometers north-east of Key West. No trip is complete without experiencing Miami Watersports Complex, Hialeah Park Racing & Casino and Hialeah Park.