$59+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MIA
Sep 13 — Sep 201
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 73 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 August 14, 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 August 14, 2026.
This Super.com deal was found by Cheapflights users on 8/13. 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 9/134:42 pm -
Nonstop3h 03m
Fri 9/188:50 pm -
Nonstop3h 05m
Deal found 8/13![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 8/13. 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 10/184:47 pm -
Nonstop2h 58m
Mon 10/198:50 pm -
Nonstop2h 57m
Deal found 8/13![Frontier logo]()
$156
This Super.com deal was found by Cheapflights users on 8/11. 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 10/119:34 pm -
Nonstop2h 58m
Fri 10/165:39 pm -
Nonstop3h 00m
Deal found 8/11![Frontier logo]()
$157
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 9/114:42 pm -
Nonstop3h 03m
Wed 9/168:50 pm -
Nonstop3h 05m
Deal found 8/12![Frontier logo]()
$158
This Frontier deal was found by Cheapflights users on 8/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/314:35 pm -
Nonstop3h 10m
Tue 9/158:50 pm -
Nonstop3h 05m
Deal found 8/9![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/24:45 pm -
1 stop6h 20m
Wed 9/98:50 pm -
Nonstop3h 05m
Deal found 8/11![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Thu 9/107:30 am -
Nonstop2h 56m
Mon 9/145:32 am -
1 stop17h 46m
Deal found 8/14![Frontier logo]()
$161
This Super.com deal was found by Cheapflights users on 8/11. 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.
Tue 9/224:42 pm -
Nonstop3h 03m
Mon 10/125:39 pm -
Nonstop3h 00m
Deal found 8/11![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 11/84:47 pm -
Nonstop2h 58m
Fri 11/137:17 pm -
1 stop12h 19m
Deal found 8/11![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/86:30 am -
1 stop9h 51m
Tue 9/159:43 pm -
1 stop9h 33m
Deal found 8/11![Frontier logo]()
$164
This Cheapflightsfares deal was found by Cheapflights users on 8/11. 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 9/207:30 am -
Nonstop2h 56m
Thu 9/246:54 pm -
1 stop20h 52m
Deal found 8/11![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/106:00 pm -
2 stops22h 29m
Sun 9/138:50 pm -
Nonstop3h 05m
Deal found 8/10![Frontier logo]()
$166
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 August 14, 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 August 14, 2026.
This Delta deal was found by Cheapflights users on 8/13. 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.
Fri 8/283:58 pm -
1 stop6h 53m
Sun 8/306:00 am -
1 stop5h 05m
Deal found 8/13![Delta logo]()
$207
This Southwest deal was found by Cheapflights users on 8/13. 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 9/166:25 am -
2 stops9h 05m
Wed 9/3012:50 pm -
2 stops9h 00m
Deal found 8/13![Southwest logo]()
$220
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 8/206:25 am -
1 stop8h 29m
Sun 8/233:57 pm -
1 stop9h 02m
Deal found 8/13![United Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 8/13. 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.
Wed 9/210:00 am -
1 stop6h 57m
Tue 9/84:35 pm -
1 stop8h 05m
Deal found 8/13![Delta logo]()
$207
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:54 pm -
1 stop5h 16m
Wed 9/308:25 am -
1 stop4h 50m
Deal found 8/9![Delta logo]()
$249
This Southwest deal was found by Cheapflights users on 8/9. 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.
Wed 9/26:25 am -
2 stops9h 05m
Wed 9/912:50 pm -
2 stops8h 10m
Deal found 8/9![Southwest logo]()
$279
This United Airlines deal was found by Cheapflights users on 8/13. 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 8/2610:30 am -
2 stops8h 22m
Mon 8/3112:17 pm -
1 stop9h 26m
Deal found 8/13![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 8/12. 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 8/202:31 pm -
1 stop6h 33m
Mon 8/247:45 pm -
1 stop5h 34m
Deal found 8/12![Delta logo]()
$307
This Southwest deal was found by Cheapflights users on 8/13. 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 9/68:25 am -
2 stops11h 40m
Fri 9/117:00 am -
2 stops10h 25m
Deal found 8/13![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 8/10. 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 -
1 stop6h 45m
Tue 11/1011:35 am -
2 stops10h 30m
Deal found 8/10![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 8/13. 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 8/2712:45 pm -
2 stops8h 00m
Mon 8/317:15 am -
1 stop10h 40m
Deal found 8/13![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 8/9. 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.
Sat 8/228:55 am -
2 stops10h 20m
Sat 8/297:00 am -
2 stops9h 10m
Deal found 8/9![Southwest logo]()
$409
Last-minute flights from Philadelphia to Key LargoDiscover last-minute flight deals from Philadelphia to Key Largo. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Key Largo. Data last updated August 14, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/11. 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 8/224:35 pm -
Nonstop3h 10m
Sat 8/298:50 pm -
Nonstop3h 05m
Deal found 8/11![Frontier logo]()
$167
This Frontier deal was found by Cheapflights users on 8/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/314:35 pm -
Nonstop3h 10m
Tue 9/158:50 pm -
Nonstop3h 05m
Deal found 8/9![Frontier logo]()
$159
This Trip.com deal was found by Cheapflights users on 8/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:30 am -
1 stop7h 02m
Thu 9/38:50 pm -
Nonstop3h 05m
Deal found 8/14![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/24:45 pm -
1 stop6h 20m
Wed 9/98:50 pm -
Nonstop3h 05m
Deal found 8/11![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/88:30 am -
1 stop7h 51m
Fri 9/119:30 pm -
1 stop9h 46m
Deal found 8/11![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/86:30 am -
1 stop9h 51m
Tue 9/159:43 pm -
1 stop9h 33m
Deal found 8/11![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Thu 9/107:30 am -
Nonstop2h 56m
Mon 9/145:32 am -
1 stop17h 46m
Deal found 8/14![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/106:00 pm -
2 stops22h 29m
Sun 9/138:50 pm -
Nonstop3h 05m
Deal found 8/10![Frontier logo]()
$166
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 9/114:42 pm -
Nonstop3h 03m
Wed 9/168:50 pm -
Nonstop3h 05m
Deal found 8/12![Frontier logo]()
$158
This Super.com deal was found by Cheapflights users on 8/13. 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 9/134:42 pm -
Nonstop3h 03m
Fri 9/188:50 pm -
Nonstop3h 05m
Deal found 8/13![Frontier logo]()
$155
This Cheapflightsfares deal was found by Cheapflights users on 8/11. 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 9/207:30 am -
Nonstop2h 56m
Thu 9/246:54 pm -
1 stop20h 52m
Deal found 8/11![Frontier logo]()
$165
This Super.com deal was found by Cheapflights users on 8/11. 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.
Tue 9/224:42 pm -
Nonstop3h 03m
Mon 10/125:39 pm -
Nonstop3h 00m
Deal found 8/11![Frontier logo]()
$162
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 August 14, 2026.
Search for one-way flight options from Philadelphia to Key Largo. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Super.com deal was found by Cheapflights users on 8/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/184:35 pm -
Nonstop3h 10m
Deal found 8/14![Frontier logo]()
$59
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 8/194:35 pm -
Nonstop3h 10m
Deal found 8/13![Frontier logo]()
$60
This Super.com deal was found by Cheapflights users on 8/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/134:42 pm -
Nonstop3h 03m
Deal found 8/14![Frontier logo]()
$61
This Super.com deal was found by Cheapflights users on 8/11. 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 8/224:35 pm -
Nonstop3h 10m
Deal found 8/11![Frontier logo]()
$64
This Super.com deal was found by Cheapflights users on 8/10. 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 10/229:34 pm -
Nonstop2h 58m
Deal found 8/10![Frontier logo]()
$65
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 9/124:42 pm -
Nonstop3h 03m
Deal found 8/12![Frontier logo]()
$70
This CheapOair deal was found by Cheapflights users on 8/12. 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.
Thu 8/274:35 pm -
Nonstop3h 10m
Deal found 8/12![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/114:47 pm -
Nonstop2h 58m
Deal found 8/13![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Thu 9/107:30 am -
Nonstop2h 56m
Deal found 8/14![Frontier logo]()
$73
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 8/254:35 pm -
Nonstop3h 10m
Deal found 8/13![Frontier logo]()
$75
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 August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $155 (Super.com) |
One-way from | $59 (Super.com) |
Popular in | July |
Cheapest in | September |
Average price | $247 |
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 August 14, 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 Philadelphia - MIA Miami
PHLMIA
Philadelphia
Fri 8/28
3:58 pm-10:51 pm
1 stop6h 53m
Miami
Sun 8/30
6:00 am-11:05 am
1 stop5h 05m
$207
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 9/2
10:00 am-4:57 pm
1 stop6h 57m
Miami
Tue 9/8
4:35 pm-12:40 am
1 stop8h 05m
$207
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 9/16
6:25 am-3:30 pm
2 stops9h 05m
Miami
Wed 9/30
12:50 pm-9:50 pm
2 stops9h 00m
$220
Quickest round-trip
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 9/23
3:54 pm-9:10 pm
1 stop5h 16m
Miami
Wed 9/30
8:25 am-1:15 pm
1 stop4h 50m
$249
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 9/2
6:25 am-3:30 pm
2 stops9h 05m
Miami
Wed 9/9
12:50 pm-9:00 pm
2 stops8h 10m
$279
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Thu 8/20
6:25 am-2:54 pm
1 stop8h 29m
Miami
Sun 8/23
3:57 pm-12:59 am
1 stop9h 02m
$297
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Thu 8/20
2:31 pm-9:04 pm
1 stop6h 33m
Miami
Mon 8/24
7:45 pm-1:19 am
1 stop5h 34m
$307
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Wed 8/26
10:30 am-6:52 pm
2 stops8h 22m
Miami
Mon 8/31
12:17 pm-9:43 pm
1 stop9h 26m
$343
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Sun 9/6
8:25 am-8:05 pm
2 stops11h 40m
Miami
Fri 9/11
7:00 am-5:25 pm
2 stops10h 25m
$353
PhiladelphiaMiami
PHL Philadelphia - MIA Miami
PHLMIA
Philadelphia
Sat 11/7
11:30 am-6:15 pm
1 stop6h 45m
Miami
Tue 11/10
11:35 am-10:05 pm
2 stops10h 30m
$395
Showing 1-10 of 23 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 August 14, 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 August 14, 2026.
The most flights from PHL to KE9 are scheduled on a Wednesday (28 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (20 on average).
How much does it cost to fly round-trip from Philadelphia to Key Largo?
Airfare is below average for this route at the moment.
Philadelphia to Key Largo flights typically cost between $184 and $401 in September.The cheapest round-trip price found within the last 5 days was $155 on Frontier (Sep 13-Sep 18).
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 August 8, 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 August 14, 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.
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
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 August 14, 2026.
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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 August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$55 | Average$291 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$139 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$128 | Average$452 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$143 | Average$457 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$145 | Average$304 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$350 | FlexibilityNo cancel fee | On-time69% |