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$49+ Cheap flights from Key Largo, FL to Philadelphia (PHL)

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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — PHL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Philadelphia are usually found in February or January, booked 89 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Key Largo to Philadelphia

Keep the following information in mind while searching for Key Largo to Philadelphia flight deals. Data was last updated June 12, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$49
(American Airlines)

Popular in

November

Cheapest in

February

Average price

$235
From Key Largo to Philadelphia
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One-way flight from Key Largo to Philadelphia
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Highest demand for flights based on searches. 12% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Key Largo to Philadelphia

Cheapest flights from Key Largo to Philadelphia
Explore the most affordable flight options available from Key Largo to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/84:45 pmMIA - PHL
Nonstop2h 44mAmerican Airlines
Tue 7/153:50 pmPHL - MIA
Nonstop2h 52mAmerican Airlines
Deal found 6/10$97
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 7/183:29 pmMIA - PHL
Nonstop2h 50mSpirit Airlines
Mon 7/2111:16 amPHL - MIA
Nonstop3h 08mSpirit Airlines
Deal found 6/11$106
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 7/117:25 amMIA - PHL
Nonstop2h 55mFrontier
Sun 7/135:36 pmPHL - MIA
Nonstop3h 02mFrontier
Deal found 6/11$127
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sat 7/2611:03 amMIA - PHL
Nonstop2h 56mMultiple Airlines
Sun 8/35:36 pmPHL - MIA
Nonstop3h 02mMultiple Airlines
Deal found 6/10$144
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:55 amMIA - PHL
1 stop7h 35mSouthwest
Mon 8/115:30 amPHL - MIA
1 stop5h 20mSouthwest
Deal found 6/10$186
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 7/2912:46 pmMIA - PHL
1 stop6h 43mDelta
Tue 8/56:00 amPHL - MIA
1 stop5h 40mDelta
Deal found 6/10$197

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo to Philadelphia 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 June 12, 2025.
Use the filters below to find and compare flights from Key Largo to Philadelphia that are best for you.

Fly from

Key Largo

Fly to

Philadelphia

Route

Depart

Return

Price

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Tue 7/8

4:45 pm-7:29 pm

Nonstop2h 44m

Philadelphia

Tue 7/15

3:50 pm-6:42 pm

Nonstop2h 52m

$97

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Fri 7/18

3:29 pm-6:19 pm

Nonstop2h 50m

Philadelphia

Mon 7/21

11:16 am-2:24 pm

Nonstop3h 08m

$106

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Fri 7/11

7:25 am-10:20 am

Nonstop2h 55m

Philadelphia

Sun 7/13

5:36 pm-8:38 pm

Nonstop3h 02m

$127

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Sat 7/26

11:03 am-1:59 pm

Nonstop2h 56m

Philadelphia

Sun 8/3

5:36 pm-8:38 pm

Nonstop3h 02m

$144

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Wed 8/6

6:55 am-2:30 pm

1 stop7h 35m

Philadelphia

Mon 8/11

5:30 am-10:50 am

1 stop5h 20m

$186

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Tue 7/29

12:46 pm-7:29 pm

1 stop6h 43m

Philadelphia

Wed 8/6

6:27 pm-12:47 am

1 stop6h 20m

$197

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Tue 7/15

8:43 am-11:26 am

Nonstop2h 43m

$49

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Fri 7/18

3:29 pm-6:19 pm

Nonstop2h 50m

$57

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Mon 7/14

9:42 pm-12:46 am

Nonstop3h 04m

$77

MiamiPhiladelphia

MIA - PHL

MIAPHL

Miami

Wed 9/10

6:55 am-2:30 pm

1 stop7h 35m

$92

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 12 results
1
2

Best time to book a flight from Key Largo to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Key Largo 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 Key Largo to Philadelphia

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Philadelphia. Price data was last updated on June 9, 2025.

The best time to book flights from Key Largo to Philadelphia is 89 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Key Largo to Philadelphia (average of $236). Flying from Key Largo to Philadelphia in March is currently the most expensive (average of $295). 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 KE9 to PHL?

Find hourly flight availability from Key Largo to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Key Largo to Philadelphia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Philadelphia. Price data was last updated on June 8, 2025.

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

Weekly flight availability from Key Largo to Philadelphia

Explore weekly flight availability from Key Largo to Philadelphia. 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 June 12, 2025.

The most flights from KE9 to PHL are scheduled on a Sunday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

Rainfall in Philadelphia by month

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

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

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

If weather is an important factor for your trip to Philadelphia, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated June 12, 2025.
Get a feel of what it's like to fly with Southwest, Delta and United Airlines from Key Largo to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
8,052 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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 Key Largo to Philadelphia. 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 into for flights to Philadelphia from Key Largo?

    If you book a flight to Philadelphia from Key Largo, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 24 flights from Key Largo to Philadelphia per day from 6 different airlines.

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

    Flights from Key Largo to Philadelphia have been viewed 72 times in the past calendar month.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Spirit Airlines and Frontier, as they are both options that can get you from Key Largo to Philadelphia for a low price.

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

    Before booking your flight to Philadelphia from Key Largo, check out the most reliable airlines to get you to your destination on time: Royal Air Maroc (85%), Aer Lingus (85%), GOL( 80%).

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

    The cheapest flight price from Key Largo to Philadelphia is $56. On average you can expect to pay $1,679. The most popular route, (Miami - Philadelphia), can usually be booked for $102.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to Philadelphia 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 Key Largo to Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Philadelphia (average of $236). Flying from Key Largo to Philadelphia in March is currently the most expensive (average of $295). 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

Traveling to a place near Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
Vineland
Wildwood
Pottstown
King of Prussia
Cherry Hill
Exton
Ocean City
Chester
Essington
Reading
Newark
Middletown
Millville
Ephrata
Camden
Dover
Elkton
Willow Grove
Glen Mills
Springfield

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Key Largo to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Key Largo to Philadelphia

Discover the top 6 airlines that operate flights from Key Largo to Philadelphia. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$126FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$72Average$139FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$83Average$117FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$142Average$383FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$333FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$199Average$377FlexibilityNo cancel feeOn-time63%

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