$33 Find Cheap Flights from Philadelphia to Key Largo

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Key Largo departing on 3/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Cheap Flight Deals from Philadelphia to Key Largo (PHL-MIA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Key Largo that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Philadelphia to Key Largo

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Philadelphia to Key Largo.
Discover the best prices and deals for you by selecting your travel dates.
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4:58 pm - 8:02 pmPHL-MIA
3h 04mnonstop
8:20 pm - 11:22 pmMIA-PHL
3h 02mnonstop
$68Spirit Airlines
Find Deal
Mon, Mar 31 - Sat, Apr 12
4:58 pm - 8:02 pmPHL-MIA
3h 04mnonstop
8:20 pm - 11:22 pmMIA-PHL
3h 02mnonstop
$70Spirit Airlines
Find Deal
Sat, Apr 5 - Wed, Apr 9
5:35 pm - 8:31 pmPHL-MIA
2h 56mnonstop
9:26 pm - 12:26 amMIA-PHL
3h 00mnonstop
$71Spirit Airlines
Find Deal
Mon, Apr 28 - Wed, Apr 30
4:58 pm - 8:02 pmPHL-MIA
3h 04mnonstop
8:57 pm - 11:59 pmMIA-PHL
3h 02mnonstop
$72Spirit Airlines
Find Deal
Thu, Apr 3 - Mon, Apr 7
6:00 am - 9:07 amPHL-MIA
3h 07mnonstop
8:57 pm - 11:59 pmMIA-PHL
3h 02mnonstop
Sun, Mar 23 - Wed, Apr 2
5:30 am - 8:25 amPHL-MIA
2h 55mnonstop
3:52 pm - 6:57 pmMIA-PHL
3h 05mnonstop
Tue, Mar 18 - Wed, Mar 19
8:11 pm - 11:15 pmPHL-MIA
3h 04mnonstop
4:08 pm - 7:06 pmMIA-PHL
2h 58mnonstop
$77Frontier
Find Deal
Sat, Apr 5 - Sat, Apr 12
12:54 pm - 3:49 pmPHL-MIA
2h 55mnonstop
3:52 pm - 6:57 pmMIA-PHL
3h 05mnonstop
$78Frontier
Find Deal
Mon, Mar 24 - Tue, Mar 25
4:43 pm - 11:37 pmPHL-MIA
6h 54m1 stop
4:47 pm - 10:20 pmMIA-PHL
5h 33m1 stop
$199Delta
Find Deal
Sat, Apr 26 - Tue, Apr 29
9:40 am - 4:30 pmPHL-MIA
6h 50m1 stop
4:47 pm - 10:20 pmMIA-PHL
5h 33m1 stop
$209Delta
Find Deal
Wed, Apr 16 - Tue, Apr 29

Good to know

Low season

September

High season

March

Cheapest flight

$33
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Philadelphia to Miami

When to book flights from Philadelphia to Key Largo

Are your dates flexible? Find out the best times to travel from Philadelphia to Key Largo based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Philadelphia to Key Largo

  • Which airports will I be using when flying from Philadelphia to Key Largo?

    When flying out of Philadelphia you’ll be using Philadelphia. Key Largo does not have its own airport so you’ll be flying into nearby Miami airport, which is 49.7 mi away.

  • How long does a flight from Philadelphia to Key Largo take?

    Direct flights cover the 1,015 miles separating Philadelphia and Key Largo in about 2h 53m.

  • How many flights are there between Philadelphia and Key Largo?

    40 direct flights run between Philadelphia and Key Largo on a daily basis. On average, there are about 285 departures each week.

  • What’s the cheapest day of the week to fly between Philadelphia and Key Largo?

    Consider leaving on a Monday and avoid Wednesdays if you are looking for the best rates. For your return to Philadelphia, you’ll find the best rates on Thursdays and the most expensive ones on Fridays.

  • How does KAYAK find such low prices on flights from Philadelphia to Key Largo?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Key Largo.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Key Largo?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Key Largo from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Key Largo?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Key Largo with an airline and back to Philadelphia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Key Largo?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Key Largo from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Philadelphia to Key Largo?

    In the last 72 hours, the cheapest one-way ticket between Philadelphia and Key Largo found on KAYAK was with Spirit Airlines for $33. Spirit Airlines offered a round-trip connection from $68 and Frontier from $77.

See more FAQs

Top tips for finding cheap flights from Philadelphia to Key Largo

  • There is no airport in Key Largo. Instead, you’ll be flying into Miami Airport when flying between Philadelphia and Key Largo.
  • The cheapest flight from Philadelphia to Key Largo was found 13 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is May.
See more tips

Top 5 airlines serving Philadelphia to Key Largo

Need help choosing which airline to fly with from Philadelphia to Key Largo? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 8036 reviews
8.0Comfort
8.5Crew
7.9Entertainment
7.3Food
8.2Boarding
Airline reviews

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

10.0 Excellentjason, Mar 2025SFO - SEA
Read more Delta reviews

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Delta is a premier airline so my expectations are most always met.

Seats are much much more comfortable than United, which is what I usually fly

Zero updates from the pilots for 30 minutes in the tarmac

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

The tv monitor in front of my seat was not responding. The flight crew reset it and it still didn’t work.

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

late again! but its my only option to not take 9 hours to get to Memphis

Almost everything was outstanding. First, we boarded on time and the flight crew did a great job getting everyone seated. Then the pilots took their time and care to make sure the plane was full de-iced three times as there was a bad ice storm a few hours earlier. The plane ride was smooth and comfortable and even the economy seats had decent room and comfort. Flight Attendant Lisa went above and beyond to make sure I was comfortable - she is outstanding. The only thing wrong with the flight, and it is something which needs to be addressed, is that the gate to gate time was over 6.5 hours and not one meal was served. The only thing offered to eat were two small cookies for a transcontinental flight - unacceptable. Charge me more but give me a meal for a long flight. Thankfully Lisa found something for me.

Very poor. Our special services attendant gave us incorrect information. I also was mishandled at landing. There was no wheelchair waiting. I fell deboarding the plane. Appalling!

I had a very unpleasant encounter with one man from customer service: he was extremely rude and miserable. And his condition was reflected on his decision to send me to the worst airport hotel and get an awful flight connection. My hotel shuttle had never arrived and I had to book another hotel. People served by other representatives got a much better treatment and deal.

The flight left a bit late, but arrived close to time expected…With the flight being close to full the crew did well serving drinks to all in a very timely fashion. The flight was a pleasure…

They didn't have any gluten-free snacks, oddly, which I require...or any flavored soda water or decaf tea options, which seems to be standard.

My flight back my reservations were list because they said I didn't pay my pet fee when I had a receipt

They could have done a better job announcing the boarding groups and asked for more drinks (water) if needed.

Very confining seats side to side. Not wide enough for any comfort.

For coast to coast travel the A321 and even the NEO, even in first class will never be excellent. That would take a B787 or 777 to accomplish.

Spirit moved the departure time by 45 minutes to an unacceptably early time. I wrote multiple times canceling the reservation and received no reply or refund.

I lijed the friendliness of the crew and that we were on time.

There should be a “Ticketing/Check In” section. A Spirit employee helped us operate the self-serve check-in kiosk, and he was very helpful. However, the ticket agent was another story. She took our (2) checked bags, but when placing them on the conveyor, dropped one of them - it fell over on the conveyor and broke the retractable handle. Two pieces of the handle broke away and landed behind the counter. She knew what had happened, but chose to ignore and moved on to the next person in line.

Our experience was not a good one. Our flight got cancelled and was not given any accommodations due to the inconvenience. We lost time on our vacation due to this inconvenience

Flight was on time It was a good flight overall

The senior flight attendant was engaging, funny and made everyone feel at ease. She is an asset to your team.

Needs legroom for tall people. Needs to offer a glass of water.

They changed our departure time 6 times before I even reached the airport. Delayed, Ontime, Delayed Back on time, Then Delayed. We finally boarded the plane and then we had to sit on the runway for over an hour only to be told they were taking us back to the gate for an additional 2 hour delay. Lack of communication and a complete waste of time! Never again!

I was traveling with my son and it was our first time with spirit so I didn’t realize our seats weren’t assigned. They scrambled and gave us seats next to each other. Also My son got sick on the plane and they really took care of him. Super family friendly crew and experience!

Great. I didn't eat or drink anything, nor did I have an option to be entertained, so i answered "okay"... but those categoriesreally don't apply. Everything else was great.

Seats were extremely uncomfortable and it was very hot on the plane.

Since they are a budget airline, I wasn’t expecting too much but they did some things well. They were on time, the plane was clean, boarding was fairly straightforward and the staff was cheerful and friendly. The only downside was comfort. The seats were fairly hard and after a 2 hour flight your rear end is not feeling so great. Maybe a little more cushion in the seats, Frontier!

Check in at Philadelphia international was absolutely terrible! I fly 2 to 3 times a month and avoid frontier at all cost and will never fly Frontier again! The night before travel, I tried checking in however, the app was giving me an error, so I went to the desktop, which instructed you that you need to use the app. The next day I presented at the check-in gate after trying at least a half dozen times prior to getting into the airport and continuing to getting the error in the app. I actually had rebooted my phone numerous times and reinstall the app just in case. My phone is only one generation older than the current model. It has no problems completing a frontier flight purchase or any other app issues. There was only three frontier employees working at check-in and a huge line while I was in line I continued to try and check in via the app. As I approach the desk, I was dreading dealing with the agent. He was extremely unprofessional, anti-semantic & very ignorant, and mean to the people in front of me, as well as the people who ended up being behind me. He literally told people “Man I don’t care bout y’all” in his native dialect! Maintaining my composure I approached and explained the situation. To which he replied, you’re gonna have to pay then! I don’t understand. It’s an issue with their app not allowing me to check in! Not my issue! He told me if I pay cash it would be $15, $25 if I pay credit card. I don’t understand a $10 difference for paying with a credit card? I am completely cashless so I continued to try using the app to avoid the $25 fee, Which I still don’t believe that I should be responsible for since it was Frontier’s technical issue!!! I continued to check in via the app a couple more times after he verified I was doing everything right he proceeded to continue to belittle the people behind me. Yelling at them saying I don’t care about you people! I cannot believe that this is the way that businesses would treat its customers! Unfortunately, the black mail with dreadlocks did not have a name tag all he had was a frontier sweater on! For the $25 fee that I ended up getting charged on my credit card. I should’ve just booked originally with Spirit or any other carrier! I have no problem paying fees that I should be responsible for, but when it’s due to a technical failure of a company, the customer should not be responsible for it! I cannot believe that it’s not frontier going out of business!

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

Our flight was suppose to leave at 9pm and we didn’t board until after 3am. We lost a whole day at our hotel and half a day at a park we paid a lot of money for.

Boarding was organized and flight was on time. Overall very satisfied with my flight.

terrible cascading delays and unhelpful customer service. uncomfortable plane. crew was great, however!

The boarding gate was in Terminal D, but the Frontier counter was in Terminal E. So I had to move back and forth between terminals to check in my luggage. This was the worst experience that I had in terms of flights.

Booked direct in July '24. Turned into a 14 hr layover (both ways) in Denver. My 5 day vaca turned into a 1 day . Not good, BUT,... Thank you for the people @ Frontier who were professionally friendly & approachable.

Airline changed the gate from Terminal A to Terminal D which is quite far and only sent a text message few minutes before boarding. Around 50 people missed their flight and as plane didn’t wait for them.

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

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