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Key Largo

$57+ Cheap flights from Philadelphia (PHL) to Key Largo, FL

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Key Largo are usually found in September or August, booked 15 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Philadelphia to Key Largo

Keep the following information in mind while searching for Philadelphia to Key Largo flight deals. Data was last updated July 3, 2025.

Round-trip from

$123
(Orbitz)

One-way from

$57
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$215
From Philadelphia to Key Largo
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One-way flight from Philadelphia to Key Largo
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Highest demand for flights based on searches. 11% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Philadelphia to Key Largo

Cheapest flights from Philadelphia to Key Largo
Explore the most affordable flight options available from Philadelphia to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Orbitz deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/25:36 pmPHL - MIA
Nonstop3h 02mMultiple Airlines
Mon 8/113:29 pmMIA - PHL
Nonstop2h 50mMultiple Airlines
Deal found 7/2$123
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/25:36 pmPHL - MIA
Nonstop3h 02mFrontier
Fri 8/87:25 amMIA - PHL
Nonstop2h 55mFrontier
Deal found 7/3$124
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/273:51 pmPHL - MIA
Nonstop3h 01mSpirit Airlines
Thu 9/46:00 amMIA - PHL
Nonstop2h 50mSpirit Airlines
Deal found 6/30$126

Cheapflights Fare Finder

Customize your flight search to find flights from Philadelphia to Key Largo that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from Philadelphia to Key Largo that are best for you.

Fly from

Philadelphia

Fly to

Key Largo

Route

Depart

Return

Price

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 8/2

5:36 pm-8:38 pm

Nonstop3h 02m

Miami

Mon 8/11

3:29 pm-6:19 pm

Nonstop2h 50m

$123

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 8/2

5:36 pm-8:38 pm

Nonstop3h 02m

Miami

Fri 8/8

7:25 am-10:20 am

Nonstop2h 55m

$124

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Wed 8/27

3:51 pm-6:52 pm

Nonstop3h 01m

Miami

Sun 8/31

6:00 am-8:52 am

Nonstop2h 52m

$126

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 8/21

3:51 pm-6:52 pm

Nonstop3h 01m

$57

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sun 7/13

5:36 pm-8:38 pm

Nonstop3h 02m

$58

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 8/7

7:50 am-3:45 pm

1 stop7h 55m

$103

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 7/17

7:33 pm-12:55 am

1 stop5h 22m

$104

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Philadelphia to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Key Largo

How far ahead should I book a flight from Philadelphia to Key Largo?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Key Largo. Price data was last updated on June 27, 2025.

Booking 15 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to Key Largo?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to Key Largo (average of $231). Flying from Philadelphia to Key Largo in March is currently the most expensive (average of $289). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to KE9?

Find hourly flight availability from Philadelphia to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to Key Largo as you normally would.

What is the cheapest day to fly from Philadelphia to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Key Largo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to Key Largo flight should consider departing on Sunday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key Largo. Reviews last updated July 3, 2025.
Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Southwest, Delta, and Spirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,286 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to Key Largo?

    If you book a flight to Key Largo from Philadelphia, you will be flying from Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 7 flights from Philadelphia to Key Largo per day from 10 different airlines.

  • How popular is this Philadelphia to Key Largo flight route?

    Flights from Philadelphia to Key Largo have been viewed 238 times in the past calendar month.

  • What are the cheapest airlines to fly from Philadelphia to Key Largo one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $57. Users have also found prices from $58 and $103 on Frontier and Southwest, respectively.

  • What are the most reliable airlines from Philadelphia to Key Largo?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Philadelphia to Key Largo on time: United Airlines (100%), Aer Lingus (90%), Iberia (78%).

  • What are the cheapest flights from Philadelphia to Key Largo?

    Looking for the cheapest flight from Philadelphia to Key Largo? While on average our users pay $814, our data indicates the cheapest price to be $59. The most popular route (Philadelphia - Miami), is priced around $97.

  • Can I find deals for flights from Philadelphia to Key Largo that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Key Largo.

  • Can I find deals for business class flights from Philadelphia to Key Largo?

    Yes. Cheapflights offers flight deals from Philadelphia to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Key Largo?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to Key Largo (average of $231). Flying from Philadelphia to Key Largo in March is currently the most expensive (average of $289). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Philadelphia to Key Largo

Discover the top 10 airlines that operate flights from Philadelphia to Key Largo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$66Average$174FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$77Average$165FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$102Average$318FlexibilityNo cancel feeOn-time88%
JetBlueCheapest$107Average$187FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$134Average$399FlexibilityNo cancel feeOn-time63%
Avelo AirlinesCheapest$136Average$233FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$177Average$420FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$386FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$218Average$463FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$243Average$315FlexibilityNo cancel feeOn-time75%

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