$116+ Cheap flights from Islip, NY (ISP) to Pennsylvania
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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Oct 15 — Oct 221
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Pennsylvania 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
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Cheapest flights from Islip to PennsylvaniaExplore the most affordable flight options available from Islip to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.
Explore the most affordable flight options available from Islip to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Tue 11/312:00 pm -
1 stop25h 29m
Sat 11/77:25 pm -
1 stop14h 52m
Deal found 9/10![Multiple Airlines logo]()
$244
This Southwest deal was found by Cheapflights users on 9/14. 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 10/126:00 am -
1 stop5h 45m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/14![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 9/13. 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.
Sat 10/176:15 am -
1 stop5h 50m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/13![Southwest logo]()
$307
This Southwest deal was found by Cheapflights users on 9/14. 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.
Wed 10/144:20 pm -
1 stop6h 20m
Wed 10/216:00 am -
2 stops9h 30m
Deal found 9/14![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 9/10. 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 10/312:20 pm -
1 stop4h 10m
Sun 10/46:00 am -
1 stop4h 20m
Deal found 9/10![Southwest logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Wed 11/412:00 pm -
2 stops11h 16m
Thu 11/57:25 pm -
1 stop18h 57m
Deal found 9/14![Multiple Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:10 pm -
1 stop8h 25m
Fri 10/166:00 pm -
1 stop5h 40m
Deal found 9/11![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/10. 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.
Sun 11/14:25 pm -
1 stop6h 15m
Tue 11/311:40 am -
1 stop9h 25m
Deal found 9/10![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 9/10. 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.
Fri 12/111:35 pm -
2 stops9h 05m
Sun 12/136:10 am -
2 stops9h 25m
Deal found 9/10![Southwest logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sat 9/2612:00 pm -
1 stop4h 27m
Wed 9/309:30 am -
1 stop24h 47m
Deal found 9/11![Multiple Airlines logo]()
$372
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/262:00 pm -
1 stop6h 45m
Wed 9/306:10 am -
1 stop4h 05m
Deal found 9/11![Southwest logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/2912:00 pm -
1 stop25h 35m
Sat 10/38:00 am -
1 stop26h 17m
Deal found 9/14![Multiple Airlines logo]()
$391
Best flights from Islip to PennsylvaniaDiscover carefully curated flight deals from Islip to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
Discover carefully curated flight deals from Islip to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Tue 11/312:00 pm -
1 stop25h 29m
Sat 11/77:25 pm -
1 stop14h 52m
Deal found 9/10![Multiple Airlines logo]()
$244
This Southwest deal was found by Cheapflights users on 9/14. 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 10/126:00 am -
1 stop5h 45m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/14![Southwest logo]()
$289
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:33 pm -
1 stop20h 20m
Sat 11/75:15 am -
1 stop12h 16m
Deal found 9/9![Frontier logo]()
$393
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:45 pm -
2 stops18h 32m
Fri 10/168:54 pm -
1 stop14h 26m
Deal found 9/11![Breeze Airways logo]()
$560
This Southwest deal was found by Cheapflights users on 9/13. 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.
Sat 10/176:15 am -
1 stop5h 50m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/13![Southwest logo]()
$307
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
1 stop7h 07m
Wed 10/77:30 am -
1 stop8h 06m
Deal found 9/9![JetBlue logo]()
$625
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sat 9/2612:00 pm -
1 stop4h 27m
Wed 9/309:30 am -
1 stop24h 47m
Deal found 9/11![Multiple Airlines logo]()
$372
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:10 pm -
1 stop8h 25m
Fri 10/166:00 pm -
1 stop5h 40m
Deal found 9/11![Southwest logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/2912:00 pm -
1 stop25h 35m
Sat 10/38:00 am -
1 stop26h 17m
Deal found 9/14![Multiple Airlines logo]()
$391
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:43 pm -
1 stop6h 26m
Wed 9/3010:37 am -
1 stop6h 21m
Deal found 9/9![Frontier logo]()
$444
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/262:00 pm -
1 stop6h 45m
Wed 9/306:10 am -
1 stop4h 05m
Deal found 9/11![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 9/10. 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 10/312:20 pm -
2 stops8h 05m
Sun 10/44:10 pm -
2 stops7h 45m
Deal found 9/10![Southwest logo]()
$381
This Frontier deal was found by Cheapflights users on 9/14. 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.
Sat 10/316:33 pm -
1 stop15h 57m
Fri 11/65:45 pm -
1 stop23h 46m
Deal found 9/14![Frontier logo]()
$473
This Southwest deal was found by Cheapflights users on 9/14. 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.
Sat 10/175:25 am -
1 stop5h 40m
Mon 10/195:35 pm -
1 stop5h 40m
Deal found 9/14![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 9/14. 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.
Wed 10/144:20 pm -
1 stop6h 20m
Wed 10/216:00 am -
1 stop7h 10m
Deal found 9/14![Southwest logo]()
$387
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
1 stop7h 59m
Wed 10/73:50 pm -
1 stop7h 32m
Deal found 9/9![JetBlue logo]()
$668
This Southwest deal was found by Cheapflights users on 9/13. 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.
Tue 10/134:20 pm -
1 stop6h 20m
Wed 10/146:00 am -
1 stop7h 10m
Deal found 9/13![Southwest logo]()
$397
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:43 pm -
1 stop6h 26m
Tue 9/297:15 am -
1 stop9h 43m
Deal found 9/10![Frontier logo]()
$594
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 am -
1 stop15h 28m
Tue 10/2712:29 pm -
1 stop9h 08m
Deal found 9/13![JetBlue logo]()
$721
This Southwest deal was found by Cheapflights users on 9/13. 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.
Mon 9/281:15 pm -
2 stops10h 00m
Fri 10/22:15 pm -
2 stops9h 20m
Deal found 9/13![Southwest logo]()
$419
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:25 am -
1 stop10h 04m
Thu 10/2911:29 am -
1 stop10h 08m
Deal found 9/10![Multiple Airlines logo]()
$741
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/1410:00 am -
1 stop11h 30m
Mon 1/257:30 am -
1 stop14h 10m
Deal found 9/10![JetBlue logo]()
$749
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:25 am -
1 stop5h 40m
Sat 10/176:00 am -
1 stop5h 40m
Deal found 9/12![Southwest logo]()
$437
This Priceline deal was found by Cheapflights users on 9/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/109:05 am -
1 stop5h 11m
Sat 10/1712:00 pm -
1 stop9h 37m
Deal found 9/12![Multiple Airlines logo]()
$801
This Southwest deal was found by Cheapflights users on 9/10. 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.
Fri 12/114:25 pm -
1 stop6h 15m
Sun 12/136:10 am -
1 stop6h 35m
Deal found 9/10![Southwest logo]()
$457
This Priceline deal was found by Cheapflights users on 9/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 am -
1 stop7h 07m
Fri 10/212:00 pm -
1 stop11h 22m
Deal found 9/13![JetBlue logo]()
$848
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/281:15 pm -
2 stops10h 40m
Fri 10/25:35 pm -
1 stop5h 35m
Deal found 9/12![Southwest logo]()
$484
This United deal was found by Cheapflights users on 9/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:25 am -
2 stops26h 22m
Mon 10/198:00 pm -
2 stops15h 05m
Deal found 9/13![Multiple Airlines logo]()
$867
This Expedia deal was found by Cheapflights users on 9/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:00 am -
1 stop13h 03m
Thu 10/17:29 am -
1 stop8h 07m
Deal found 9/12![JetBlue logo]()
$923
This Southwest deal was found by Cheapflights users on 9/10. 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.
Tue 11/245:35 am -
1 stop9h 25m
Mon 11/307:15 am -
1 stop10h 05m
Deal found 9/10![Southwest logo]()
$489
Last-minute flights from Islip to PennsylvaniaDiscover last-minute flight deals from Islip to Pennsylvania. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pennsylvania. Data last updated September 15, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/1512:00 pm -
1 stop25h 35m
Thu 9/176:39 pm -
1 stop15h 49m
Deal found 9/11![Multiple Airlines logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sat 9/2612:00 pm -
1 stop4h 27m
Wed 9/309:30 am -
1 stop24h 47m
Deal found 9/11![Multiple Airlines logo]()
$372
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/262:00 pm -
1 stop6h 45m
Wed 9/306:10 am -
1 stop4h 05m
Deal found 9/11![Southwest logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/2912:00 pm -
1 stop25h 35m
Sat 10/38:00 am -
1 stop26h 17m
Deal found 9/14![Multiple Airlines logo]()
$391
This Southwest deal was found by Cheapflights users on 9/10. 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 10/312:20 pm -
1 stop4h 10m
Sun 10/46:00 am -
1 stop4h 20m
Deal found 9/10![Southwest logo]()
$334
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:10 pm -
1 stop8h 25m
Fri 10/166:00 pm -
1 stop5h 40m
Deal found 9/11![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:25 am -
1 stop5h 40m
Sat 10/176:00 am -
1 stop5h 40m
Deal found 9/12![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 9/14. 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 10/126:00 am -
1 stop5h 45m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/14![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 9/13. 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.
Tue 10/134:20 pm -
1 stop6h 20m
Wed 10/146:00 am -
1 stop7h 10m
Deal found 9/13![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 9/14. 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.
Wed 10/144:20 pm -
1 stop6h 20m
Wed 10/216:00 am -
2 stops9h 30m
Deal found 9/14![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 9/13. 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.
Sat 10/176:15 am -
1 stop5h 50m
Mon 10/196:00 pm -
1 stop5h 40m
Deal found 9/13![Southwest logo]()
$307
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:33 pm -
1 stop20h 20m
Sat 11/75:15 am -
1 stop12h 16m
Deal found 9/9![Frontier logo]()
$393
One-way flights from Islip to PennsylvaniaSearch for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
Search for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
This CheapOair deal was found by Cheapflights users on 9/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:43 pm -
1 stop20h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 12/183:02 pm -
1 stop5h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Breeze Airways logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:55 pm -
2 stops23h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$172
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:40 am -
2 stops8h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Southwest logo]()
$176
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:20 pm -
1 stop6h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Southwest logo]()
$189
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/74:20 pm -
1 stop6h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Southwest logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/201:38 pm -
3 stops32h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$210
This Southwest deal was found by Cheapflights users on 9/14. 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.
Sat 10/105:25 am -
1 stop5h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Southwest logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/712:00 pm -
3 stops28h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/75:43 pm -
2 stops28h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$248
This Southwest deal was found by Cheapflights users on 9/10. 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.
Fri 12/1812:10 pm -
2 stops9h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Southwest logo]()
$249
This Southwest deal was found by Cheapflights users on 9/14. 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 9/285:00 pm -
1 stop6h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Southwest logo]()
$262
Find flight deals from Islip to Pennsylvania
Keep the following information in mind while searching for Islip to Pennsylvania flight deals. Data was last updated September 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Kiwi.com) |
One-way from | $116 (CheapOair) |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Pennsylvania 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 15, 2026.
Use the filters below to find and compare flights from Islip to Pennsylvania that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Tue 10/6
9:40 am-6:35 pm
2 stops8h 55m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$176
Quickest round-trip
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Tue 10/20
4:20 pm-10:40 pm
1 stop6h 20m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$189
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Wed 10/7
4:20 pm-10:40 pm
1 stop6h 20m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$209
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Tue 10/20
1:38 pm-9:59 pm
3 stops32h 21m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$210
IslipPhiladelphia
ISP Islip Long Island - PHL Philadelphia
ISPPHL
Islip Long Island
Tue 11/3
12:00 pm-1:29 pm
1 stop25h 29m
Philadelphia
Sat 11/7
7:25 pm-10:17 am
1 stop14h 52m
$244
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Wed 10/7
12:00 pm-4:56 pm
3 stops28h 56m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$246
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Wed 10/7
5:43 pm-9:59 pm
2 stops28h 16m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$248
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Fri 12/18
12:10 pm-9:40 pm
2 stops9h 30m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$249
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Mon 9/28
5:00 pm-11:55 pm
1 stop6h 55m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$262
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Sat 10/10
6:25 pm-12:04 pm
2 stops41h 39m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$275
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Islip to Pennsylvania
Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Islip with our price prediction graph.
ISP-PHL
ISP-PIT
ISP-DCA
ISP-JFK
ISP-LGA
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 Islip to Pennsylvania
ISP-USPA
ISP-PHL
ISP-PIT
ISP-DCA
ISP-JFK
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Pennsylvania
Get insights into the airlines that provide service to Pennsylvania. 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 Pennsylvania. Reviews last updated September 15, 2026.
Get a feel of what it's like to fly with Southwest from Islip to Pennsylvania by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Food
7.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Related info for your journey
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Islip and Pennsylvania flights
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Islip to Pennsylvania flights
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Top airline flying from Islip to Pennsylvania
Discover the top airline that operate flights from Islip to Pennsylvania. 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 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$240 | Average$325 | FlexibilityNo cancel fee | On-time63% |