$62+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Jul 29 — Aug 51
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Key Largo with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Philadelphia to Key Largo are usually found in September or January, booked 29 days in advance, depart on a Monday or Sunday and return on a Friday
Cheap flight deals from Philadelphia to Key Largo
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to Key LargoExplore 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 June 29, 2026.
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 June 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Thu 9/244:47 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Sun 9/278:50 pm
MIA
- PHL
Nonstop2h 57m
Frontier
Deal found 6/24![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 6/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/264:35 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Thu 9/38:50 pm
MIA
- PHL
Nonstop3h 05m
Frontier
Deal found 6/24![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 6/26. 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 10/14:47 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Thu 10/298:50 pm
MIA
- PHL
Nonstop2h 57m
Frontier
Deal found 6/26![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 6/25. 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.
Wed 8/194:35 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Thu 8/279:35 am
MIA
- PHL
Nonstop2h 54m
Frontier
Deal found 6/25![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 6/25. 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.
Mon 8/105:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 8/209:35 am
MIA
- PHL
Nonstop2h 54m
Frontier
Deal found 6/25![Frontier logo]()
$123
This Cheapflightsfares deal was found by Cheapflights users on 6/28. 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.
Thu 8/65:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 8/139:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/28![Frontier logo]()
$125
This Orbitz deal was found by Cheapflights users on 6/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/25![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 6/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 9/39:35 am
MIA
- PHL
Nonstop2h 54m
Frontier
Deal found 6/28![Frontier logo]()
$128
This Super.com deal was found by Cheapflights users on 6/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/27![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 6/26. 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.
Mon 7/135:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/169:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/26![Frontier logo]()
$132
Best flights from Philadelphia to Key LargoDiscover carefully curated flight deals from Philadelphia to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 29, 2026.
Discover carefully curated flight deals from Philadelphia to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 29, 2026.
This Southwest deal was found by Cheapflights users on 6/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:25 am
PHL
- MIA
2 stops9h 00m
Southwest
Tue 8/49:15 am
MIA
- PHL
2 stops8h 45m
Southwest
Deal found 6/28![Southwest logo]()
$379
This Delta deal was found by Cheapflights users on 6/25. 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.
Thu 12/246:35 am
PHL
- MIA
1 stop5h 02m
Delta
Tue 12/2912:45 pm
MIA
- PHL
1 stop5h 34m
Delta
Deal found 6/25![Delta logo]()
$502
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:10 am
PHL
- MIA
2 stops16h 17m
United Airlines
Wed 7/295:32 pm
MIA
- PHL
1 stop7h 25m
United Airlines
Deal found 6/26![United Airlines logo]()
$559
This Southwest deal was found by Cheapflights users on 6/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:45 am
PHL
- MIA
2 stops10h 05m
Southwest
Fri 11/204:15 pm
MIA
- PHL
1 stop7h 00m
Southwest
Deal found 6/28![Southwest logo]()
$469
This Southwest deal was found by Cheapflights users on 6/25. 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 8/1210:45 am
PHL
- MIA
2 stops9h 25m
Southwest
Sun 8/166:45 am
MIA
- PHL
2 stops9h 10m
Southwest
Deal found 6/25![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 6/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:45 am
PHL
- MIA
2 stops9h 25m
Southwest
Sun 8/96:45 am
MIA
- PHL
2 stops9h 10m
Southwest
Deal found 6/28![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 6/26. 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.
Sat 8/228:55 am
PHL
- MIA
2 stops10h 20m
Southwest
Sun 8/306:45 am
MIA
- PHL
2 stops8h 45m
Southwest
Deal found 6/26![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 6/26. 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.
Sun 10/112:40 pm
PHL
- MIA
2 stops8h 30m
Southwest
Thu 10/157:00 am
MIA
- PHL
2 stops10h 35m
Southwest
Deal found 6/26![Southwest logo]()
$478
This Southwest deal was found by Cheapflights users on 6/27. 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 7/151:50 pm
PHL
- MIA
2 stops8h 25m
Southwest
Sat 7/186:10 am
MIA
- PHL
1 stop4h 40m
Southwest
Deal found 6/27![Southwest logo]()
$480
This Southwest deal was found by Cheapflights users on 6/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/195:30 pm
PHL
- MIA
1 stop4h 45m
Southwest
Wed 7/226:00 am
MIA
- PHL
2 stops7h 10m
Southwest
Deal found 6/28![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 6/27. 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.
Sat 7/1111:25 am
PHL
- MIA
2 stops11h 05m
Southwest
Tue 7/147:40 am
MIA
- PHL
2 stops9h 20m
Southwest
Deal found 6/27![Southwest logo]()
$485
This Southwest deal was found by Cheapflights users on 6/24. 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.
Sat 7/112:50 pm
PHL
- MIA
2 stops8h 15m
Southwest
Mon 7/135:25 am
MIA
- PHL
2 stops7h 55m
Southwest
Deal found 6/24![Southwest logo]()
$558
Last-minute flights from Philadelphia to Key LargoDiscover last-minute flight deals from Philadelphia to Key Largo. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Key Largo. Data last updated June 29, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Tue 7/75:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/99:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/24![Frontier logo]()
$141
This Cheapflightsfares deal was found by Cheapflights users on 6/26. 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 7/105:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/169:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/26![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 6/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/115:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/25![Frontier logo]()
$146
This Frontier deal was found by Cheapflights users on 6/26. 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.
Mon 7/135:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/169:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/26![Frontier logo]()
$132
This Super.com deal was found by Cheapflights users on 6/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/27![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 6/26. 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.
Tue 7/215:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/26![Frontier logo]()
$138
This Orbitz deal was found by Cheapflights users on 6/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Thu 7/239:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/25![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 6/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Fri 7/319:21 pm
MIA
- PHL
Nonstop3h 06m
Frontier
Deal found 6/28![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Thu 7/235:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Tue 7/288:30 am
MIA
- PHL
1 stop13h 58m
Frontier
Deal found 6/28![Frontier logo]()
$140
One-way flights from Philadelphia to Key LargoSearch for one-way flight options from Philadelphia to Key Largo. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
Search for one-way flight options from Philadelphia to Key Largo. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Thu 9/35:25 am
PHL
- MIA
Nonstop3h 04m
Frontier
Deal found 6/24![Frontier logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 6/27. 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.
Thu 8/135:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/27![Frontier logo]()
$70
This eDestinos deal was found by Cheapflights users on 6/25. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/25![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 6/24. 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.
Sun 8/234:35 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Deal found 6/24![Frontier logo]()
$72
This iWofly deal was found by Cheapflights users on 6/26. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/26![Frontier logo]()
$75
This Super.com deal was found by Cheapflights users on 6/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/24![Frontier logo]()
$77
This CheapOair deal was found by Cheapflights users on 6/24. 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 7/215:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/24![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 6/24. 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.
Sun 8/95:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/24![Frontier logo]()
$79
This iWofly deal was found by Cheapflights users on 6/26. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:25 pm
PHL
- MIA
Nonstop3h 01m
Frontier
Deal found 6/26![Frontier logo]()
$82
This Trip.com deal was found by Cheapflights users on 6/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:30 am
PHL
- MIA
1 stop10h 03m
Frontier
Deal found 6/24![Frontier logo]()
$85
Find 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 June 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $119 (Cheapflightsfares) |
One-way from | $62 (Cheapflightsfares) |
Popular in | June |
Cheapest in | September |
Average price | $281 |
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 June 29, 2026.
Use the filters below to find and compare flights from Philadelphia to Key Largo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Tue 7/28
7:25 am-4:25 pm
2 stops9h 00m
Miami
Tue 8/4
9:15 am-6:00 pm
2 stops8h 45m
$379
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Tue 11/17
11:45 am-9:50 pm
2 stops10h 05m
Miami
Fri 11/20
4:15 pm-11:15 pm
1 stop7h 00m
$469
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Wed 8/12
10:45 am-8:10 pm
2 stops9h 25m
Miami
Sun 8/16
6:45 am-3:55 pm
2 stops9h 10m
$474
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Wed 8/5
10:45 am-8:10 pm
2 stops9h 25m
Miami
Sun 8/9
6:45 am-3:55 pm
2 stops9h 10m
$474
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sat 8/22
8:55 am-7:15 pm
2 stops10h 20m
Miami
Sun 8/30
6:45 am-3:30 pm
2 stops8h 45m
$474
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sun 10/11
2:40 pm-11:10 pm
2 stops8h 30m
Miami
Thu 10/15
7:00 am-5:35 pm
2 stops10h 35m
$478
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Wed 7/15
1:50 pm-10:15 pm
2 stops8h 25m
Miami
Sat 7/18
6:10 am-10:50 am
1 stop4h 40m
$480
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sun 7/19
5:30 pm-10:15 pm
1 stop4h 45m
Miami
Wed 7/22
6:00 am-1:10 pm
2 stops7h 10m
$481
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sat 7/11
11:25 am-10:30 pm
2 stops11h 05m
Miami
Tue 7/14
7:40 am-5:00 pm
2 stops9h 20m
$485
Quickest round-trip
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Thu 12/24
6:35 am-11:37 am
1 stop5h 02m
Miami
Tue 12/29
12:45 pm-6:19 pm
1 stop5h 34m
$502
Showing 1-10 of 22 resultsSorted by cheapest first
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.
PHL-MIA
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
PHL-KE9
PHL-MIA
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 June 29, 2026.
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.
How much does it cost to fly round-trip from Philadelphia to Key Largo?
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 June 27, 2026.
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
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 June 29, 2026.
Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Southwest,Allegiant Air, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
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.
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Philadelphia and Key Largo flights
Browse other Philadelphia and Key Largo flight options. Last updated on June 29, 2026.
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Philadelphia to Key Largo flights
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Top 7 airlines flying from Philadelphia to Key Largo
Discover the top 7 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 June 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$150 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$55 | Average$275 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$136 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$115 | Average$414 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$143 | Average$444 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$145 | Average$281 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$350 | FlexibilityNo cancel fee | On-time69% |