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Key Largo

$40+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Key Largo are usually found in September or May, 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 April 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$88
(Cheapflightsfares)

One-way from

$40
(eDestinos)

Popular in

December

Cheapest in

September

Average price

$257
Provider with most accurate pricing for Philadelphia-Miami flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Miami flights.
Search Deals
From Philadelphia to Key Largo
Search Deals
One-way flight from Philadelphia to Key Largo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Sun 5/182:18 pmPHL - MIA
Nonstop2h 55mFrontier
Thu 5/229:42 pmMIA - PHL
Nonstop3h 11mFrontier
Deal found 4/14$88
This FlightHub deal was found by Cheapflights users on 4/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:35 pmPHL - MIA
Nonstop2h 56mSpirit Airlines
Tue 4/299:26 pmMIA - PHL
Nonstop3h 00mSpirit Airlines
Deal found 4/14$94
This Priceline deal was found by Cheapflights users on 4/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/173:42 pmPHL - MIA
Nonstop2h 48mMultiple Airlines
Thu 5/229:42 pmMIA - PHL
Nonstop3h 11mMultiple Airlines
Deal found 4/14$95
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/146:15 pmPHL - MIA
1 stop6h 22mDelta
Wed 5/217:30 pmMIA - PHL
1 stop5h 27mDelta
Deal found 4/14$199

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 April 15, 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

Sun 5/18

10:05 am-1:05 pm

Nonstop3h 00m

Miami

Tue 5/20

11:35 am-2:35 pm

Nonstop3h 00m

$88

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Mon 4/28

5:35 pm-8:31 pm

Nonstop2h 56m

Miami

Tue 4/29

9:26 pm-12:26 am

Nonstop3h 00m

$94

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 5/17

3:42 pm-6:30 pm

Nonstop2h 48m

Miami

Thu 5/22

9:42 pm-12:53 am

Nonstop3h 11m

$95

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Wed 5/14

6:15 pm-12:37 am

1 stop6h 22m

Miami

Wed 5/21

7:30 pm-12:57 am

1 stop5h 27m

$199

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Mon 5/19

11:31 am-2:28 pm

Nonstop2h 57m

$40

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 5/17

3:42 pm-6:30 pm

Nonstop2h 48m

$44

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Sat 5/17

2:15 pm-10:20 pm

1 stop8h 05m

$140

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Wed 5/14

3:00 pm-7:50 pm

1 stop4h 50m

$156

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Tue 6/17

12:09 pm-6:17 pm

1 stop6h 08m

$203

PhiladelphiaMiami

PHL - MIA

PHLMIA

Philadelphia

Wed 6/25

6:25 am-3:14 pm

1 stop8h 49m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 11 results
1
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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 April 11, 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 $229). 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 April 15, 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 Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Philadelphia to Key Largo

Explore weekly flight availability from Philadelphia to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 15, 2025.

The most flights from PHL to KE9 are scheduled on a Tuesday (32 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (25 on average).

Rainfall in Key Largo by month

Plan your trip to Key Largo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

Temperature in Key Largo by month

Plan your trip to Key Largo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

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 April 15, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Philadelphia to Key Largo to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,279 reviews
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,918 reviews
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,658 reviews
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,927 reviews
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,279 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 28 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 290 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 Frontier. According to our data, you can fly for as low as $40. Users have also found prices from $49 and $140 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 (79%), Iberia (79%), British Airways (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 $907, our data indicates the cheapest price to be $46. The most popular route (Philadelphia - Miami), is priced around $86.

  • 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 $229). 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.

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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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$61Average$152FlexibilityNo cancel feeOn-time65%
FrontierCheapest$63Average$167FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$117Average$346FlexibilityNo cancel feeOn-time88%
Avelo AirlinesCheapest$136Average$233FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$172Average$415FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$189Average$189FlexibilityNo cancel feeOn-time62%
DeltaCheapest$196Average$379FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$206Average$416FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$218Average$455FlexibilityNo cancel feeOn-time69%

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