$40+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Apr 18 — Apr 251
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 84 days in advance, depart on a Friday 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 March 19, 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 March 19, 2026.
This Priceline deal was found by Cheapflights users on 3/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:05 am
PHL
- MIA
Nonstop3h 03m
Multiple Airlines
Mon 4/208:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$84
This Booking.com deal was found by Cheapflights users on 3/18. 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.
Sat 5/95:32 pm
PHL
- MIA
Nonstop2h 56m
Multiple Airlines
Sun 5/107:36 am
MIA
- PHL
Nonstop2h 45m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$85
This Super.com deal was found by Cheapflights users on 3/15. 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 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Thu 4/95:01 am
MIA
- PHL
Nonstop3h 05m
Frontier
Deal found 3/15![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 3/17. 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 5/115:32 pm
PHL
- MIA
Nonstop2h 56m
Frontier
Sat 5/169:38 pm
MIA
- PHL
Nonstop3h 07m
Frontier
Deal found 3/17![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Wed 4/810:00 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/15![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Sun 4/198:30 am
PHL
- MIA
Nonstop3h 13m
Multiple Airlines
Sat 4/252:01 pm
MIA
- PHL
Nonstop2h 45m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$89
This Frontier deal was found by Cheapflights users on 3/16. 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 4/286:50 am
PHL
- MIA
Nonstop3h 03m
Frontier
Sat 5/210:13 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/16![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 3/246:12 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Thu 4/29:07 am
MIA
- PHL
Nonstop2h 56m
Frontier
Deal found 3/14![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 3/246:12 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Thu 3/268:15 am
MIA
- PHL
Nonstop2h 56m
Frontier
Deal found 3/14![Frontier logo]()
$92
This Priceline deal was found by Cheapflights users on 3/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:01 pm
PHL
- MIA
Nonstop3h 07m
Multiple Airlines
Thu 4/168:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Frontier deal was found by Cheapflights users on 3/15. 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.
Fri 4/249:41 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Wed 4/2910:58 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/15![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 5/95:32 pm
PHL
- MIA
Nonstop2h 56m
Multiple Airlines
Mon 5/187:36 am
MIA
- PHL
Nonstop2h 45m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$95
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 March 19, 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 March 19, 2026.
This Southwest deal was found by Cheapflights users on 3/18. 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.
Thu 6/42:00 pm
PHL
- MIA
2 stops8h 05m
Southwest
Tue 6/911:25 am
MIA
- PHL
1 stop5h 35m
Southwest
Deal found 3/18![Southwest logo]()
$432
This Delta deal was found by Cheapflights users on 3/16. 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 6/135:20 pm
PHL
- MIA
1 stop7h 36m
Delta
Fri 6/196:00 am
MIA
- PHL
1 stop5h 05m
Delta
Deal found 3/16![Delta logo]()
$539
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 4/117:45 pm
PHL
- MIA
2 stops17h 34m
United Airlines
Tue 4/1412:24 pm
MIA
- PHL
1 stop9h 08m
United Airlines
Deal found 3/17![United Airlines logo]()
$586
This Southwest deal was found by Cheapflights users on 3/18. 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.
Mon 5/412:20 pm
PHL
- MIA
2 stops9h 40m
Southwest
Mon 5/116:20 am
MIA
- PHL
2 stops10h 25m
Southwest
Deal found 3/18![Southwest logo]()
$447
This Southwest deal was found by Cheapflights users on 3/16. 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 5/267:30 am
PHL
- MIA
2 stops9h 20m
Southwest
Sat 5/306:15 am
MIA
- PHL
2 stops9h 30m
Southwest
Deal found 3/16![Southwest logo]()
$486
This Southwest deal was found by Cheapflights users on 3/17. 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 4/2412:45 pm
PHL
- MIA
2 stops9h 15m
Southwest
Tue 4/287:00 am
MIA
- PHL
2 stops9h 50m
Southwest
Deal found 3/17![Southwest logo]()
$488
This Southwest deal was found by Cheapflights users on 3/16. 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 5/96:15 am
PHL
- MIA
2 stops10h 45m
Southwest
Sun 5/106:10 am
MIA
- PHL
2 stops9h 35m
Southwest
Deal found 3/16![Southwest logo]()
$492
This Southwest deal was found by Cheapflights users on 3/14. 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.
Mon 4/138:55 am
PHL
- MIA
1 stop6h 25m
Southwest
Fri 4/1711:40 am
MIA
- PHL
2 stops10h 05m
Southwest
Deal found 3/14![Southwest logo]()
$493
This Southwest deal was found by Cheapflights users on 3/17. 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 5/2912:45 pm
PHL
- MIA
2 stops9h 15m
Southwest
Mon 6/16:20 am
MIA
- PHL
2 stops10h 25m
Southwest
Deal found 3/17![Southwest logo]()
$498
This Southwest deal was found by Cheapflights users on 3/16. 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 6/62:50 pm
PHL
- MIA
2 stops8h 10m
Southwest
Sat 6/136:20 am
MIA
- PHL
2 stops10h 35m
Southwest
Deal found 3/16![Southwest logo]()
$536
This Southwest deal was found by Cheapflights users on 3/15. 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 5/155:25 pm
PHL
- MIA
1 stop4h 35m
Southwest
Sun 5/248:05 am
MIA
- PHL
2 stops9h 50m
Southwest
Deal found 3/15![Southwest logo]()
$544
This Southwest deal was found by Cheapflights users on 3/16. 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.
Thu 6/112:00 pm
PHL
- MIA
2 stops8h 05m
Southwest
Sun 6/145:35 am
MIA
- PHL
1 stop7h 55m
Southwest
Deal found 3/16![Southwest logo]()
$550
Last-minute flights from Philadelphia to Key LargoDiscover last-minute flight deals from Philadelphia to Key Largo. Data last updated March 19, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Key Largo. Data last updated March 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 3/246:12 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Thu 4/29:07 am
MIA
- PHL
Nonstop2h 56m
Frontier
Deal found 3/14![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 3/246:12 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Thu 3/268:15 am
MIA
- PHL
Nonstop2h 56m
Frontier
Deal found 3/14![Frontier logo]()
$92
This Super.com deal was found by Cheapflights users on 3/15. 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 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Thu 4/95:01 am
MIA
- PHL
Nonstop3h 05m
Frontier
Deal found 3/15![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 3/16. 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 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Thu 4/1610:27 pm
MIA
- PHL
Nonstop3h 02m
Frontier
Deal found 3/16![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Wed 4/810:00 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/15![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/118:11 pm
PHL
- MIA
Nonstop2h 55m
Multiple Airlines
Fri 4/178:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$85
This Priceline deal was found by Cheapflights users on 3/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:01 pm
PHL
- MIA
Nonstop3h 07m
Multiple Airlines
Thu 4/168:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Priceline deal was found by Cheapflights users on 3/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:05 am
PHL
- MIA
Nonstop3h 03m
Multiple Airlines
Mon 4/208:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Sun 4/198:30 am
PHL
- MIA
Nonstop3h 13m
Multiple Airlines
Sat 4/252:01 pm
MIA
- PHL
Nonstop2h 45m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$89
This Frontier deal was found by Cheapflights users on 3/15. 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.
Fri 4/249:41 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Wed 4/2910:58 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/15![Frontier logo]()
$94
This Priceline deal was found by Cheapflights users on 3/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:41 pm
PHL
- MIA
Nonstop2h 58m
Multiple Airlines
Mon 4/278:12 am
MIA
- PHL
Nonstop2h 42m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$95
This Frontier deal was found by Cheapflights users on 3/16. 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 4/286:50 am
PHL
- MIA
Nonstop3h 03m
Frontier
Sat 5/210:13 am
MIA
- PHL
Nonstop3h 04m
Frontier
Deal found 3/16![Frontier logo]()
$90
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 March 19, 2026.
Search for one-way flight options from Philadelphia to Key Largo. Find affordable one-way fares based on user searches. Data last updated March 19, 2026.
This Frontier deal was found by Cheapflights users on 3/16. 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 4/115:44 pm
PHL
- MIA
Nonstop3h 02m
Frontier
Deal found 3/16![Frontier logo]()
$40
This eDestinos deal was found by Cheapflights users on 3/15. 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.
Mon 4/67:41 pm
PHL
- MIA
Nonstop3h 10m
Frontier
Deal found 3/15![Frontier logo]()
$43
This Frontier deal was found by Cheapflights users on 3/17. 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 5/185:32 pm
PHL
- MIA
Nonstop2h 56m
Frontier
Deal found 3/17![Frontier logo]()
$44
This Frontier deal was found by Cheapflights users on 3/14. 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 4/216:50 am
PHL
- MIA
Nonstop3h 03m
Frontier
Deal found 3/14![Frontier logo]()
$45
This Frontier deal was found by Cheapflights users on 3/17. 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 5/165:32 pm
PHL
- MIA
Nonstop2h 56m
Frontier
Deal found 3/17![Frontier logo]()
$49
This CheapOair deal was found by Cheapflights users on 3/18. 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.
Sat 4/185:51 pm
PHL
- MIA
Nonstop2h 47m
Spirit Airlines
Deal found 3/18![Spirit Airlines logo]()
$50
This eDestinos deal was found by Cheapflights users on 3/15. 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.
Tue 3/246:12 pm
PHL
- MIA
Nonstop2h 58m
Frontier
Deal found 3/15![Frontier logo]()
$52
This eDestinos deal was found by Cheapflights users on 3/15. 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.
Tue 3/249:53 am
PHL
- MIA
Nonstop2h 54m
Spirit Airlines
Deal found 3/15![Spirit Airlines logo]()
$53
This CheapOair deal was found by Cheapflights users on 3/17. 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.
Wed 4/89:53 am
PHL
- MIA
Nonstop2h 54m
Spirit Airlines
Deal found 3/17![Spirit Airlines logo]()
$55
This Spirit deal was found by Cheapflights users on 3/16. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/79:53 am
PHL
- MIA
Nonstop2h 54m
Spirit Airlines
Deal found 3/16![Spirit Airlines logo]()
$58
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 March 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $84 (Priceline) |
One-way from | $40 (Frontier) |
Popular in | June |
Cheapest in | September |
Average price | $229 |
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 March 19, 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
Thu 6/4
2:00 pm-10:05 pm
2 stops8h 05m
Miami
Tue 6/9
11:25 am-5:00 pm
1 stop5h 35m
$432
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Mon 5/4
12:20 pm-10:00 pm
2 stops9h 40m
Miami
Mon 5/11
6:20 am-4:45 pm
2 stops10h 25m
$447
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Tue 5/26
7:30 am-4:50 pm
2 stops9h 20m
Miami
Sat 5/30
6:15 am-3:45 pm
2 stops9h 30m
$486
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Fri 4/24
12:45 pm-10:00 pm
2 stops9h 15m
Miami
Tue 4/28
7:00 am-4:50 pm
2 stops9h 50m
$488
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sat 5/9
6:15 am-5:00 pm
2 stops10h 45m
Miami
Sun 5/10
6:10 am-3:45 pm
2 stops9h 35m
$492
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Mon 4/13
8:55 am-3:20 pm
1 stop6h 25m
Miami
Fri 4/17
11:40 am-9:45 pm
2 stops10h 05m
$493
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Fri 5/29
12:45 pm-10:00 pm
2 stops9h 15m
Miami
Mon 6/1
6:20 am-4:45 pm
2 stops10h 25m
$498
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sat 6/6
2:50 pm-11:00 pm
2 stops8h 10m
Miami
Sat 6/13
6:20 am-4:55 pm
2 stops10h 35m
$536
Quickest round-trip
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Sat 6/13
5:20 pm-12:56 am
1 stop7h 36m
Miami
Fri 6/19
6:00 am-11:05 am
1 stop5h 05m
$539
PhiladelphiaMiami
PHL - MIA
PHLMIA
Philadelphia
Fri 5/15
5:25 pm-10:00 pm
1 stop4h 35m
Miami
Sun 5/24
8:05 am-5:55 pm
2 stops9h 50m
$544
Showing 1-10 of 21 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
How far ahead should I book a flight from Philadelphia to Key Largo?
Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Key Largo. Price data was last updated on March 13, 2026.
Booking 84 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Philadelphia to Key Largo?
Currently, March is the cheapest month in which you can book a flight from Philadelphia to Key Largo (average of $38). Flying from Philadelphia to Key Largo in June is currently the most expensive (average of $81). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from 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 March 19, 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 evening, which can drop the price by up to 49% versus a flight in the morning.
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 March 14, 2026.
Travelers seeking maximum savings on their Philadelphia to Key Largo flight should consider departing on Sunday at noon when fares are most often at their lowest. Saturday 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
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 March 19, 2026.
The most flights from PHL to KE9 are scheduled on a Monday (25 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (19 on average).
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 March 19, 2026.
Read through reviews of airlines operating flights from Philadelphia to Key Largo, such as Allegiant Air,JetBlue, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
Crew
8.1
Boarding
7.6
Overall
7.3
Food
5.9
Comfort
6.9
Entertainment
5.5
Reviews
1 / 20
4.0
OkayMichael,Feb 2026
PIE - IND
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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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 March 19, 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 March 19, 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 9 airlines flying from Philadelphia to Key Largo
Discover the top 9 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 March 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$145 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$55 | Average$229 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$65 | Average$189 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$82 | Average$148 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$115 | Average$382 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$134 | Average$272 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$141 | Average$422 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$350 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$243 | Average$341 | FlexibilityNo cancel fee | On-time75% |