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Key Largo

$43+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Key Largo are usually found in September or October, booked 21 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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$84
(CheapOair)

One-way from

$43
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$207
Provider with most accurate pricing for Philadelphia-Miami flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Miami flights.
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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. 6% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 30, 2025.

This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:18 pmPHL - MIA
1 stop5h 40mFrontier
Fri 11/148:25 pmMIA - PHL
Nonstop2h 58mFrontier
Deal found 10/28$84
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/1510:22 amPHL - MIA
Nonstop3h 04mMultiple Airlines
Mon 1/126:45 amMIA - PHL
Nonstop2h 52mMultiple Airlines
Deal found 10/28$85
This CheapOair deal was found by Cheapflights users on 10/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:42 pmPHL - MIA
Nonstop3h 00mFrontier
Sun 12/143:17 pmMIA - PHL
Nonstop2h 51mFrontier
Deal found 10/30$86
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/151:26 pmPHL - MIA
Nonstop2h 53mMultiple Airlines
Mon 11/177:38 pmMIA - PHL
1 stop5h 01mMultiple Airlines
Deal found 10/29$87
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/214:54 pmPHL - MIA
Nonstop3h 00mMultiple Airlines
Wed 11/269:59 pmMIA - PHL
Nonstop2h 55mMultiple Airlines
Deal found 10/29$88
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 11/255:50 pmPHL - MIA
Nonstop2h 59mMultiple Airlines
Fri 11/286:00 amMIA - PHL
Nonstop2h 53mMultiple Airlines
Deal found 10/28$89
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:24 pmPHL - MIA
Nonstop2h 58mFrontier
Mon 11/249:56 pmMIA - PHL
Nonstop2h 55mFrontier
Deal found 10/30$90
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 11/166:24 pmPHL - MIA
Nonstop2h 58mMultiple Airlines
Sun 11/236:00 amMIA - PHL
Nonstop2h 53mMultiple Airlines
Deal found 10/30$92
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:22 amPHL - MIA
Nonstop3h 04mSpirit Airlines
Sat 12/208:40 pmMIA - PHL
Nonstop2h 54mSpirit Airlines
Deal found 10/28$93
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:50 amPHL - MIA
1 stop11h 35mFrontier
Sat 11/229:59 pmMIA - PHL
Nonstop2h 55mFrontier
Deal found 10/30$94
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 11/284:54 pmPHL - MIA
Nonstop3h 00mMultiple Airlines
Thu 12/43:17 pmMIA - PHL
Nonstop2h 51mMultiple Airlines
Deal found 10/28$95
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:25 amPHL - MIA
Nonstop2h 52mFrontier
Sat 11/156:35 pmMIA - PHL
1 stop5h 38mFrontier
Deal found 10/28$96

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 October 30, 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

Wed 12/31

5:17 am-8:15 am

Nonstop2h 58m

Miami

Mon 1/5

8:40 pm-11:34 pm

Nonstop2h 54m

$173

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Tue 12/30

6:00 am-12:46 pm

1 stop6h 46m

Miami

Wed 1/7

1:41 pm-7:09 pm

1 stop5h 28m

$177

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sun 2/8

12:15 pm-9:30 pm

1 stop9h 15m

Miami

Thu 2/12

7:05 am-2:45 pm

1 stop7h 40m

$188

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 1/1

6:00 am-11:36 am

1 stop5h 36m

Miami

Wed 1/7

10:29 am-3:52 pm

1 stop5h 23m

$198

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 2/21

3:55 pm-9:02 pm

1 stop5h 07m

Miami

Fri 2/27

7:35 pm-12:22 am

1 stop4h 47m

$199

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Fri 1/30

2:30 pm-8:44 pm

1 stop6h 14m

Miami

Sat 2/7

6:00 am-10:58 am

1 stop4h 58m

$203

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 2/5

9:40 am-5:48 pm

1 stop8h 08m

Miami

Thu 2/12

7:35 pm-12:22 am

1 stop4h 47m

$222

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Fri 12/12

7:17 pm-12:46 am

1 stop5h 29m

Miami

Wed 12/17

12:36 pm-6:12 pm

1 stop5h 36m

$228

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 1/31

12:40 pm-9:35 pm

2 stops8h 55m

Miami

Thu 2/5

6:45 am-4:30 pm

2 stops9h 45m

$248

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Thu 1/29

12:15 pm-8:05 pm

2 stops7h 50m

Miami

Sun 2/1

7:35 am-1:00 pm

1 stop5h 25m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 22 results
1
2
3

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 October 24, 2025.

Booking 21 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, December is the cheapest month in which you can book a flight from Philadelphia to Key Largo (average of $26). Flying from Philadelphia to Key Largo in June is currently the most expensive (average of $75). 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 October 30, 2025.

When flying from Philadelphia to Key Largo, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 46% versus a flight in the morning.

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 Friday mornings when fares are most often at their lowest. Saturday 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 October 30, 2025.
Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,993 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,030 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,115 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,123 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 8 flights from Philadelphia to Key Largo per day from 9 different airlines.

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

    Flights from Philadelphia to Key Largo have been viewed 232 times in the past calendar month.

  • How long is the flight from Philadelphia to Key Largo?

    Departing from Philadelphia to Key Largo will take you 2h 58m. The distance between Philadelphia and Key Largo is about 1015 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $54. Users have also found prices from $65 and $82 on Spirit Airlines 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: Aer Lingus (95%), Frontier (88%), American Airlines (76%).

  • 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 $683, our data indicates the cheapest price to be $39. The most popular route (Philadelphia - Miami), is priced around $70.

  • 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, December is the cheapest month in which you can book a flight from Philadelphia to Key Largo (average of $26). Flying from Philadelphia to Key Largo in June is currently the most expensive (average of $75). 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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Alternative routes for Philadelphia to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Philadelphia to Key Largo

Discover the top 9 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$66Average$176FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$78Average$166FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$88Average$229FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$102Average$235FlexibilityNo cancel feeOn-time88%
SouthwestCheapest$134Average$304FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$170Average$434FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$395FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$243Average$315FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$316Average$433FlexibilityNo cancel feeOn-time69%

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