How popular is this Philadelphia to Key Largo flight route?

Flights from Philadelphia to Key Largo have been viewed 416 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 $36. Users have also found prices from $39 and $63 on Allegiant Air and JetBlue, respectively.

Weekly flight availability from Philadelphia to Key Largo

The most flights from PHL to KE9 are scheduled on a Sunday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).

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.

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).

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 $652, our data indicates the cheapest price to be $57. The most popular route (Philadelphia - Miami), is priced around $117.

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: Alaska Airlines (70%), British Airways (67%), Volaris (63%).

What are the most popular airlines that fly from Philadelphia to Key Largo?

Before booking your flight from Philadelphia to Key Largo check out the most popular airlines for this route: Frontier, American Airlines or JetBlue.

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 26 flights from Philadelphia to Key Largo per day from 7 different airlines.

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.

Find Cheap Flights from Philadelphia to Key Largo

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Cheapflights Tip: The best prices from Philadelphia to Key Largo are usually found in January or April, booked 72 days in advance, depart on a Monday or Sunday and return on a Friday

Find flight deals from Philadelphia to Key Largo

Most accurate provider	FlightHub 3 stars
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Popular in	August
Cheapest in	January
Average price	$251

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Highest demand for flights based on searches. 12% potential increase in price ($35 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 September 2026

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

Prices

Airlines

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

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 afternoon, which can drop the price by up to 50% versus a flight in the morning.

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

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

Reviews of airlines servicing Key Largo

Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Delta,Allegiant Air, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

Delta

7.8

Good

8,612 reviews

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

Allegiant Air

7.3

Good

678 reviews

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

JetBlue

7.1

Good

3,041 reviews

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

American Airlines

7.0

Good

12,097 reviews

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

Frontier

5.6

Fair

2,568 reviews

Delta

7.8

Good

8,612 reviews

Reviews

1 / 20

10.0

Excellent

Salvador,Aug 2026

PHL - DTW

No food and entertainment. Also de aircraft is old and noisy.

Related info for your journey

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 26 flights from Philadelphia to Key Largo per day from 7 different airlines.
How popular is this Philadelphia to Key Largo flight route?
Flights from Philadelphia to Key Largo have been viewed 416 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 $36. Users have also found prices from $39 and $63 on Allegiant Air and JetBlue, 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: Alaska Airlines (70%), British Airways (67%), Volaris (63%).
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 $652, our data indicates the cheapest price to be $57. The most popular route (Philadelphia - Miami), is priced around $117.
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.

See more FAQs

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Top 7 airlines flying from Philadelphia to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$40	Average$200	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$55	Average$303	FlexibilityNo cancel fee	On-time62%
Allegiant Air	Cheapest$78	Average$146	FlexibilityNo cancel fee	On-time88%
Delta	Cheapest$133	Average$445	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$141	Average$350	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$161	Average$476	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$236	Average$316	FlexibilityNo cancel fee	On-time69%

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

Find cheap flights from Philadelphia to Key Largo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Philadelphia to Key Largo

Most accurate provider

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Popular in

Cheapest in

Average price

Cheapflights Insights

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

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 afternoon, which can drop the price by up to 50% versus a flight in the morning.

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

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

Weekly flight availability from Philadelphia to Key Largo

The most flights from PHL to KE9 are scheduled on a Sunday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).

Reviews of airlines servicing Key Largo

Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Delta,Allegiant Air, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How popular is this Philadelphia to Key Largo flight route?

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

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

What are the cheapest flights from Philadelphia to Key Largo?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Philadelphia to Key Largo by cabin class

Find flights from Philadelphia to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Philadelphia and Key Largo flights

Browse other Philadelphia and Key Largo flight options. Last updated on September 29, 2026.

Other flights from Philadelphia

Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on September 29, 2026.

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Top 7 airlines flying from Philadelphia to Key Largo

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