$101+ Cheap flights from Islip, NY (ISP) to Pennsylvania
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Aug 29 — Sep 51
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Pennsylvania with Cheapflights
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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 July 30, 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 July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:20 pm
ISP
- PIT
1 stop5h 30m
Southwest
Wed 8/266:10 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$201
This Southwest deal was found by Cheapflights users on 7/29. 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 9/141:15 pm
ISP
- PIT
2 stops10h 00m
Southwest
Wed 9/166:30 am
PIT
- ISP
2 stops8h 25m
Southwest
Deal found 7/29![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:10 pm
ISP
- PIT
1 stop3h 55m
Southwest
Mon 10/2612:10 pm
PIT
- ISP
1 stop4h 50m
Southwest
Deal found 7/27![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/223:15 pm
ISP
- PIT
1 stop5h 30m
Southwest
Mon 8/245:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/171:15 pm
ISP
- PIT
2 stops8h 20m
Southwest
Sat 9/1910:05 am
PIT
- ISP
2 stops10h 45m
Southwest
Deal found 7/28![Southwest logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/105:28 pm
ISP
- PHL
2 stops19h 08m
Multiple Airlines
Thu 9/173:30 pm
PHL
- ISP
1 stop25h 28m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2610:57 am
ISP
- PHL
1 stop13h 02m
Frontier
Wed 9/25:16 pm
PHL
- ISP
1 stop24h 58m
Frontier
Deal found 7/29![Frontier logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2611:57 am
ISP
- PHL
2 stops43h 18m
Multiple Airlines
Wed 9/25:16 pm
PHL
- ISP
1 stop24h 58m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$300
This JetBlue deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:44 pm
ISP
- DCA
1 stop6h 15m
JetBlue
Wed 9/94:35 pm
DCA
- ISP
1 stop6h 47m
JetBlue
Deal found 7/26![JetBlue logo]()
$311
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:00 pm
ISP
- PIT
1 stop6h 15m
Southwest
Sun 9/276:35 am
PIT
- ISP
1 stop3h 20m
Southwest
Deal found 7/27![Southwest logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm
ISP
- PHL
1 stop15h 22m
Frontier
Thu 9/173:30 pm
PHL
- ISP
1 stop25h 28m
Frontier
Deal found 7/26![Frontier logo]()
$312
This JetBlue deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:06 am
ISP
- DCA
1 stop9h 53m
JetBlue
Tue 9/13:20 pm
DCA
- ISP
1 stop6h 29m
JetBlue
Deal found 7/28![JetBlue logo]()
$313
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 July 30, 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 July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:20 pm
ISP
- PIT
1 stop5h 30m
Southwest
Wed 8/266:10 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$201
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:06 am
ISP
- DCA
1 stop9h 53m
JetBlue
Tue 9/13:20 pm
DCA
- ISP
1 stop6h 29m
JetBlue
Deal found 7/27![JetBlue logo]()
$311
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:05 pm
ISP
- PIT
1 stop5h 50m
Southwest
Sat 9/193:30 pm
PIT
- ISP
1 stop5h 20m
Southwest
Deal found 7/28![Southwest logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/2710:57 am
ISP
- LGA
2 stops12h 17m
Frontier
Thu 9/38:29 pm
LGA
- ISP
1 stop13h 24m
Frontier
Deal found 7/30![Frontier logo]()
$451
This Southwest deal was found by Cheapflights users on 7/29. 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 9/141:15 pm
ISP
- PIT
2 stops10h 00m
Southwest
Wed 9/166:10 am
PIT
- ISP
1 stop6h 00m
Southwest
Deal found 7/29![Southwest logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:28 pm
ISP
- PHL
1 stop20h 47m
Multiple Airlines
Sun 8/168:37 pm
PHL
- ISP
2 stops13h 16m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$477
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:10 pm
ISP
- PIT
1 stop3h 55m
Southwest
Mon 10/2612:10 pm
PIT
- ISP
1 stop4h 50m
Southwest
Deal found 7/27![Southwest logo]()
$219
This JetBlue deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
ISP
- LGA
1 stop7h 32m
JetBlue
Sat 9/512:00 pm
LGA
- ISP
1 stop9h 44m
JetBlue
Deal found 7/25![JetBlue logo]()
$341
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:30 am
ISP
- PIT
2 stops8h 25m
Southwest
Mon 8/245:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$259
This KAYAK deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:08 am
ISP
- AVP
2 stops21h 57m
Breeze Airways
Sun 9/278:59 pm
AVP
- ISP
2 stops14h 13m
Breeze Airways
Deal found 7/25![Breeze Airways logo]()
$749
This Expedia deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:58 pm
ISP
- JFK
1 stop8h 20m
JetBlue
Tue 9/111:30 am
JFK
- ISP
1 stop10h 19m
JetBlue
Deal found 7/28![JetBlue logo]()
$341
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:00 am
ISP
- JFK
1 stop7h 07m
JetBlue
Fri 9/113:45 pm
JFK
- ISP
1 stop7h 37m
JetBlue
Deal found 7/27![JetBlue logo]()
$341
This JetBlue deal was found by Cheapflights users on 7/29. 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.
Fri 10/27:00 am
ISP
- JFK
1 stop6h 57m
JetBlue
Tue 10/67:30 am
JFK
- ISP
1 stop8h 06m
JetBlue
Deal found 7/29![JetBlue logo]()
$343
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:00 pm
ISP
- PIT
1 stop6h 15m
Southwest
Sun 9/276:35 am
PIT
- ISP
1 stop3h 20m
Southwest
Deal found 7/27![Southwest logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:57 am
ISP
- LGA
2 stops10h 02m
Frontier
Mon 9/78:29 pm
LGA
- ISP
1 stop13h 24m
Frontier
Deal found 7/26![Frontier logo]()
$497
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:10 am
ISP
- PIT
1 stop6h 00m
Southwest
Sun 9/206:00 am
PIT
- ISP
2 stops9h 55m
Southwest
Deal found 7/28![Southwest logo]()
$336
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:55 pm
ISP
- JFK
1 stop7h 48m
JetBlue
Sun 11/811:29 am
JFK
- ISP
1 stop10h 08m
JetBlue
Deal found 7/27![JetBlue logo]()
$404
This Southwest deal was found by Cheapflights users on 7/30. 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 9/52:00 pm
ISP
- DCA
1 stop7h 55m
Southwest
Sun 9/67:55 am
DCA
- ISP
1 stop7h 50m
Southwest
Deal found 7/30![Southwest logo]()
$357
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:30 pm
ISP
- LGA
1 stop6h 34m
JetBlue
Fri 9/114:00 pm
LGA
- ISP
1 stop7h 22m
JetBlue
Deal found 7/27![JetBlue logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:13 pm
ISP
- AVP
2 stops19h 09m
Multiple Airlines
Sun 9/278:59 pm
AVP
- ISP
1 stop12h 34m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$659
This Southwest deal was found by Cheapflights users on 7/29. 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 11/54:25 pm
ISP
- DCA
1 stop6h 15m
Southwest
Mon 11/96:10 am
DCA
- ISP
1 stop6h 35m
Southwest
Deal found 7/29![Southwest logo]()
$357
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:58 pm
ISP
- JFK
1 stop8h 20m
JetBlue
Fri 9/117:30 am
JFK
- ISP
1 stop8h 06m
JetBlue
Deal found 7/27![JetBlue logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:28 pm
ISP
- PHL
1 stop20h 47m
Multiple Airlines
Wed 8/128:35 am
PHL
- ISP
1 stop10h 26m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$668
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:05 am
ISP
- PIT
1 stop6h 00m
Southwest
Sat 8/159:40 am
PIT
- ISP
1 stop9h 50m
Southwest
Deal found 7/27![Southwest logo]()
$364
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 am
ISP
- JFK
1 stop8h 05m
JetBlue
Tue 11/1011:29 am
JFK
- ISP
1 stop10h 08m
JetBlue
Deal found 7/27![JetBlue logo]()
$405
This Priceline deal was found by Cheapflights users on 7/29. 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 8/266:00 am
ISP
- LGA
1 stop7h 32m
JetBlue
Wed 9/212:00 pm
LGA
- ISP
1 stop9h 44m
JetBlue
Deal found 7/29![JetBlue logo]()
$413
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:35 pm
ISP
- PHL
2 stops9h 10m
Southwest
Thu 9/172:05 pm
PHL
- ISP
2 stops8h 05m
Southwest
Deal found 7/26![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 7/29. 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 8/206:45 am
ISP
- DCA
1 stop8h 45m
Southwest
Mon 8/2412:55 pm
DCA
- ISP
1 stop8h 35m
Southwest
Deal found 7/29![Southwest logo]()
$397
This JetBlue deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:16 am
ISP
- JFK
1 stop8h 43m
JetBlue
Wed 9/97:30 am
JFK
- ISP
1 stop8h 06m
JetBlue
Deal found 7/25![JetBlue logo]()
$444
This United deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:34 pm
ISP
- SCE
2 stops20h 28m
Multiple Airlines
Sun 8/308:00 pm
SCE
- ISP
2 stops24h 15m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$907
Last-minute flights from Islip to PennsylvaniaDiscover last-minute flight deals from Islip to Pennsylvania. Data last updated July 30, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pennsylvania. Data last updated July 30, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:05 am
ISP
- PIT
1 stop6h 00m
Southwest
Sat 8/159:40 am
PIT
- ISP
1 stop9h 50m
Southwest
Deal found 7/27![Southwest logo]()
$364
This Southwest deal was found by Cheapflights users on 7/29. 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 8/131:15 pm
ISP
- PIT
2 stops9h 55m
Southwest
Mon 8/175:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/29![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 7/29. 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 8/144:05 pm
ISP
- PIT
1 stop5h 45m
Southwest
Mon 8/175:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/29![Southwest logo]()
$351
This JetBlue deal was found by Cheapflights users on 7/30. 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.
Thu 8/2011:35 am
ISP
- DCA
1 stop8h 24m
JetBlue
Mon 8/243:20 pm
DCA
- ISP
1 stop6h 24m
JetBlue
Deal found 7/30![JetBlue logo]()
$385
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/223:15 pm
ISP
- PIT
1 stop5h 30m
Southwest
Mon 8/245:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:20 pm
ISP
- PIT
1 stop5h 30m
Southwest
Wed 8/266:10 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 7/25![Southwest logo]()
$201
This Expedia deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:58 pm
ISP
- JFK
1 stop8h 20m
JetBlue
Tue 9/111:30 am
JFK
- ISP
1 stop10h 19m
JetBlue
Deal found 7/28![JetBlue logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:57 am
ISP
- LGA
2 stops12h 17m
Frontier
Tue 9/18:29 pm
LGA
- ISP
1 stop13h 24m
Frontier
Deal found 7/28![Frontier logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2610:57 am
ISP
- PHL
1 stop13h 02m
Frontier
Wed 9/25:16 pm
PHL
- ISP
1 stop24h 58m
Frontier
Deal found 7/29![Frontier logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2611:57 am
ISP
- PHL
2 stops43h 18m
Multiple Airlines
Wed 9/25:16 pm
PHL
- ISP
1 stop24h 58m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2611:57 am
ISP
- LGA
2 stops11h 17m
Multiple Airlines
Wed 9/28:29 pm
LGA
- ISP
1 stop13h 24m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$343
This JetBlue deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:06 am
ISP
- DCA
1 stop9h 53m
JetBlue
Tue 9/13:20 pm
DCA
- ISP
1 stop6h 29m
JetBlue
Deal found 7/27![JetBlue logo]()
$311
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 July 30, 2026.
Search for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:05 pm
ISP
- PIT
1 stop5h 50m
Southwest
Deal found 7/28![Southwest logo]()
$101
This Southwest deal was found by Cheapflights users on 7/29. 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 9/96:05 am
ISP
- PIT
2 stops9h 05m
Southwest
Deal found 7/29![Southwest logo]()
$106
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:10 pm
ISP
- PIT
1 stop3h 55m
Southwest
Deal found 7/27![Southwest logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/105:43 pm
ISP
- PHL
1 stop15h 22m
Frontier
Deal found 7/29![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/105:28 pm
ISP
- PHL
2 stops25h 57m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$152
This Priceline deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:35 pm
ISP
- DCA
1 stop6h 24m
JetBlue
Deal found 7/27![JetBlue logo]()
$156
This Priceline deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:55 am
ISP
- DCA
1 stop6h 04m
JetBlue
Deal found 7/28![JetBlue logo]()
$157
This Expedia deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:00 am
ISP
- JFK
1 stop8h 54m
JetBlue
Deal found 7/28![JetBlue logo]()
$171
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:57 am
ISP
- PIT
1 stop7h 18m
Frontier
Deal found 7/25![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:57 am
ISP
- LGA
2 stops11h 17m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:15 pm
ISP
- DCA
2 stops10h 40m
Southwest
Deal found 7/27![Southwest logo]()
$184
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:30 am
ISP
- DCA
1 stop8h 20m
Southwest
Deal found 7/25![Southwest logo]()
$199
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 July 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $201 (Southwest) |
One-way from | $101 (Southwest) |
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 2,558,603 searches. Data last updated July 30, 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 - PIT
ISPPIT
Islip Long Island
Tue 8/25
3:20 pm-8:50 pm
1 stop5h 30m
Pittsburgh
Wed 8/26
6:10 am-10:15 am
1 stop4h 05m
$201
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Thu 9/17
4:05 pm-9:55 pm
1 stop5h 50m
Pittsburgh
Sat 9/19
3:30 pm-8:50 pm
1 stop5h 20m
$201
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Mon 9/14
1:15 pm-11:15 pm
2 stops10h 00m
Pittsburgh
Wed 9/16
6:10 am-12:10 pm
1 stop6h 00m
$206
Quickest round-trip
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Fri 10/23
3:10 pm-7:05 pm
1 stop3h 55m
Pittsburgh
Mon 10/26
12:10 pm-5:00 pm
1 stop4h 50m
$219
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Sat 8/22
5:30 am-1:55 pm
2 stops8h 25m
Pittsburgh
Mon 8/24
5:35 am-9:40 am
1 stop4h 05m
$259
IslipWashington, D.C.
ISP - DCA
ISPDCA
Islip Long Island
Sat 8/29
10:06 am-7:59 pm
1 stop9h 53m
Washington, D.C. Reagan-National
Tue 9/1
3:20 pm-9:49 pm
1 stop6h 29m
$311
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Fri 9/25
5:00 pm-11:15 pm
1 stop6h 15m
Pittsburgh
Sun 9/27
6:35 am-9:55 am
1 stop3h 20m
$312
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Fri 9/18
6:10 am-12:10 pm
1 stop6h 00m
Pittsburgh
Sun 9/20
6:00 am-3:55 pm
2 stops9h 55m
$336
IslipNew York
ISP - LGA
ISPLGA
Islip Long Island
Tue 9/1
6:00 am-1:32 pm
1 stop7h 32m
New York LaGuardia
Sat 9/5
12:00 pm-9:44 pm
1 stop9h 44m
$341
IslipNew York
ISP - JFK
ISPJFK
Islip Long Island
Tue 8/25
4:58 pm-1:18 am
1 stop8h 20m
New York John F Kennedy Intl
Tue 9/1
11:30 am-9:49 pm
1 stop10h 19m
$341
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-PIT
ISP-PHL
ISP-DCA
ISP-LGA
ISP-JFK
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-PIT
ISP-PHL
ISP-DCA
ISP-LGA
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 July 30, 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.
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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 2,558,603 searches. Data last updated July 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$240 | Average$325 | FlexibilityNo cancel fee | On-time63% |