$55+ Cheap flights from Philadelphia (PHL) to Key Largo, FL
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Oct 10 — Oct 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 January or April, booked 55 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 September 10, 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 September 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/6. 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 10/47:30 am -
Nonstop2h 56m
Sun 10/411:30 pm -
1 stop29h 17m
Deal found 9/6![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 9/7. 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.
Thu 12/37:00 am -
Nonstop3h 11m
Sun 12/69:40 pm -
Nonstop2h 57m
Deal found 9/7![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/18:41 am -
1 stop6h 43m
Wed 10/79:43 pm -
1 stop9h 28m
Deal found 9/9![Frontier logo]()
$156
This Cheapflightsfares deal was found by Cheapflights users on 9/4. 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 9/84:35 pm -
Nonstop3h 10m
Thu 9/102:50 pm -
Nonstop2h 55m
Deal found 9/4![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/318:39 am -
1 stop8h 25m
Thu 11/58:46 pm -
Nonstop2h 57m
Deal found 9/5![Frontier logo]()
$158
This Frontier deal was found by Cheapflights users on 9/5. 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.
Sat 10/318:39 am -
1 stop8h 25m
Wed 11/410:36 pm -
1 stop8h 35m
Deal found 9/5![Frontier logo]()
$159
This Gotogate deal was found by Cheapflights users on 9/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:25 pm -
1 stop17h 24m
Mon 10/59:30 pm -
1 stop9h 46m
Deal found 9/5![Frontier logo]()
$160
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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.
Wed 9/3012:40 pm -
1 stop7h 58m
Mon 10/58:50 pm -
Nonstop3h 05m
Deal found 9/5![Frontier logo]()
$161
This Cheapflightsfares deal was found by Cheapflights users on 9/6. 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.
Sat 11/148:39 am -
1 stop8h 25m
Tue 11/1710:36 pm -
1 stop8h 45m
Deal found 9/6![Frontier logo]()
$162
This Frontier deal was found by Cheapflights users on 9/7. 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.
Sat 10/34:42 pm -
Nonstop3h 03m
Wed 10/711:34 am -
1 stop8h 01m
Deal found 9/7![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/128:30 am -
1 stop25h 45m
Thu 10/158:45 pm -
Nonstop2h 57m
Deal found 9/8![Frontier logo]()
$165
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 September 10, 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 September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/39:00 pm -
2 stops18h 24m
Tue 10/69:43 pm -
1 stop9h 33m
Deal found 9/4![Frontier logo]()
$225
This Southwest deal was found by Cheapflights users on 9/8. 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 11/711:30 am -
2 stops9h 25m
Mon 11/97:05 am -
2 stops10h 50m
Deal found 9/8![Southwest logo]()
$420
This Delta deal was found by Cheapflights users on 9/8. 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.
Sat 9/1212:09 pm -
1 stop6h 56m
Sun 9/136:26 pm -
1 stop6h 14m
Deal found 9/8![Delta logo]()
$547
This Southwest deal was found by Cheapflights users on 9/9. 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 9/2210:45 am -
2 stops9h 30m
Thu 9/247:00 am -
2 stops10h 25m
Deal found 9/9![Southwest logo]()
$439
This Southwest deal was found by Cheapflights users on 9/6. 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 9/128:55 am -
2 stops10h 25m
Mon 9/147:15 am -
1 stop10h 40m
Deal found 9/6![Southwest logo]()
$440
This Southwest deal was found by Cheapflights users on 9/9. 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 11/152:30 pm -
2 stops7h 30m
Wed 11/1811:35 am -
2 stops11h 35m
Deal found 9/9![Southwest logo]()
$449
This Southwest deal was found by Cheapflights users on 9/7. 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 10/312:05 pm -
2 stops10h 00m
Mon 10/57:10 am -
2 stops9h 15m
Deal found 9/7![Southwest logo]()
$479
This Southwest deal was found by Cheapflights users on 9/6. 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 10/1712:05 pm -
2 stops10h 05m
Sat 10/247:00 am -
2 stops9h 25m
Deal found 9/6![Southwest logo]()
$505
This Southwest deal was found by Cheapflights users on 9/4. 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 9/296:25 am -
2 stops9h 05m
Tue 10/68:40 am -
2 stops9h 15m
Deal found 9/4![Southwest logo]()
$523
This Southwest deal was found by Cheapflights users on 9/9. 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.
Fri 11/1311:40 am -
2 stops10h 20m
Sun 11/155:35 pm -
1 stop5h 30m
Deal found 9/9![Southwest logo]()
$534
This Southwest deal was found by Cheapflights users on 9/6. 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.
Fri 10/21:55 pm -
2 stops9h 10m
Thu 10/87:10 am -
2 stops9h 15m
Deal found 9/6![Southwest logo]()
$541
This Southwest deal was found by Cheapflights users on 9/5. 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 10/271:20 pm -
2 stops8h 55m
Sun 11/13:10 pm -
2 stops8h 05m
Deal found 9/5![Southwest logo]()
$552
Last-minute flights from Philadelphia to Key LargoDiscover last-minute flight deals from Philadelphia to Key Largo. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Key Largo. Data last updated September 10, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 9/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:42 pm -
Nonstop3h 03m
Sat 9/128:50 pm -
Nonstop3h 05m
Deal found 9/5![Frontier logo]()
$156
This Super.com deal was found by Cheapflights users on 9/4. 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 9/94:42 pm -
Nonstop3h 03m
Thu 9/108:50 pm -
Nonstop3h 05m
Deal found 9/4![Frontier logo]()
$157
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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.
Wed 9/3012:40 pm -
1 stop7h 58m
Mon 10/58:50 pm -
Nonstop3h 05m
Deal found 9/5![Frontier logo]()
$161
This Gotogate deal was found by Cheapflights users on 9/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:25 pm -
1 stop17h 24m
Mon 10/59:30 pm -
1 stop9h 46m
Deal found 9/5![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 9/7. 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.
Sat 10/34:42 pm -
Nonstop3h 03m
Thu 10/84:05 pm -
1 stop7h 22m
Deal found 9/7![Frontier logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 9/6. 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 10/47:30 am -
Nonstop2h 56m
Sun 10/411:30 pm -
1 stop29h 17m
Deal found 9/6![Frontier logo]()
$154
This Cheapflightsfares deal was found by Cheapflights users on 9/5. 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.
Mon 10/58:41 am -
1 stop11h 52m
Fri 10/910:55 pm -
1 stop8h 26m
Deal found 9/5![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/712:40 pm -
1 stop7h 58m
Wed 10/1410:36 pm -
1 stop8h 35m
Deal found 9/9![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/128:30 am -
1 stop25h 45m
Thu 10/158:45 pm -
Nonstop2h 57m
Deal found 9/8![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/318:39 am -
1 stop8h 25m
Thu 11/58:46 pm -
Nonstop2h 57m
Deal found 9/5![Frontier logo]()
$158
This Frontier deal was found by Cheapflights users on 9/5. 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.
Sat 10/318:39 am -
1 stop8h 25m
Wed 11/410:36 pm -
1 stop8h 35m
Deal found 9/5![Frontier logo]()
$159
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 September 10, 2026.
Search for one-way flight options from Philadelphia to Key Largo. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Super.com deal was found by Cheapflights users on 9/7. 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.
Sun 10/47:30 am -
Nonstop2h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$55
This Cheapflightsfares deal was found by Cheapflights users on 9/6. 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.
Wed 11/412:36 pm -
1 stop8h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Tue 11/312:36 pm -
1 stop21h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Tue 10/68:41 am -
1 stop11h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 9/7. 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.
Wed 10/288:30 am -
1 stop13h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 11/75:20 pm -
1 stop28h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Tue 9/295:32 pm -
1 stop27h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 12/56:48 pm -
1 stop23h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 9/5. 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 12/147:00 am -
Nonstop3h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$68
This Super.com deal was found by Cheapflights users on 9/4. 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.
Thu 9/174:42 pm -
Nonstop3h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$69
This WAYA deal was found by Cheapflights users on 9/5. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:40 pm -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$71
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $154 (Cheapflightsfares) |
One-way from | $55 (Super.com) |
Popular in | August |
Cheapest in | January |
Average price | $211 |
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 7,457,451 searches. Data last updated September 10, 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
Quickest round-trip
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Thu 9/17
4:42 pm-7:45 pm
Nonstop3h 03m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Tue 9/15
7:59 pm-3:24 pm
2 stops43h 25m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$214
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Sat 10/3
9:00 pm-3:24 pm
2 stops18h 24m
Miami
Tue 10/6
9:43 pm-7:16 am
1 stop9h 33m
$225
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Fri 2/26
1:40 pm-10:30 pm
1 stop8h 50m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$240
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Thu 12/17
7:30 am-6:00 pm
2 stops10h 30m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$271
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Sun 11/8
11:40 am-10:00 pm
2 stops10h 20m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$300
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Thu 2/11
11:15 am-10:30 pm
2 stops11h 15m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$318
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Fri 2/12
11:15 am-11:05 pm
1 stop11h 50m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$330
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Sat 1/23
6:00 pm-11:46 pm
1 stop5h 46m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$389
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 1/6
11:17 am-6:56 pm
1 stop7h 39m
Miami
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$399
Showing 1-10 of 24 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 September 10, 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.
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 September 10, 2026.
The most flights from PHL to KE9 are scheduled on a Tuesday (31 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Philadelphia to Key Largo?
Airfare is typical for this route at the moment.
Philadelphia to Key Largo flights typically cost between $150 and $330 in October.The cheapest round-trip price found within the last 5 days was $154 on Frontier (Oct 4-Oct 4).
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 September 5, 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 September 10, 2026.
Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Delta,Allegiant Air, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
Overall
7.8
Food
7.2
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSalvador,Aug 2026
PHL - DTW
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.
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from Philadelphia
Popular flights
Top destinations
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 10, 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 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Philadelphia to Key Largo flights
Consider these flights traveling from Philadelphia to Key Largo.
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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$177 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$55 | Average$298 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$140 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$133 | Average$453 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$145 | Average$312 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$157 | Average$467 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$350 | FlexibilityNo cancel fee | On-time69% |