$112+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Jul 11 — Jul 181
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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.Cheap flight deals from Islip to Pennsylvania
Cheapest
Best
Last-minute
One-way
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 June 11, 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 June 11, 2026.
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:05 pm
ISP
- PIT
1 stop5h 45m
Southwest
Mon 9/145:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 6/8![Southwest logo]()
$209
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:35 pm
ISP
- PIT
1 stop5h 05m
Southwest
Sun 9/276:35 am
PIT
- ISP
1 stop3h 20m
Southwest
Deal found 6/8![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:50 pm
ISP
- PIT
1 stop5h 45m
Southwest
Mon 7/274:45 pm
PIT
- ISP
1 stop7h 00m
Southwest
Deal found 6/6![Southwest logo]()
$243
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:30 pm
ISP
- PIT
1 stop5h 35m
Southwest
Tue 7/712:45 pm
PIT
- ISP
1 stop3h 15m
Southwest
Deal found 6/7![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 9/36:45 am
ISP
- DCA
1 stop8h 45m
Southwest
Sat 9/511:55 am
DCA
- ISP
1 stop7h 35m
Southwest
Deal found 6/9![Southwest logo]()
$273
This Gotogate deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:52 pm
ISP
- PIT
1 stop20h 22m
Frontier
Sun 6/287:09 pm
PIT
- ISP
1 stop25h 48m
Frontier
Deal found 6/7![Frontier logo]()
$300
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:43 am
ISP
- PIT
1 stop7h 32m
Frontier
Sun 7/197:13 pm
PIT
- ISP
1 stop14h 40m
Frontier
Deal found 6/6![Frontier logo]()
$302
This Southwest deal was found by Cheapflights users on 6/9. 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 9/2611:55 am
ISP
- PIT
2 stops8h 45m
Southwest
Sun 9/276:00 am
PIT
- ISP
1 stop6h 05m
Southwest
Deal found 6/9![Southwest logo]()
$305
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 10/125:00 pm
ISP
- DCA
1 stop5h 55m
Southwest
Thu 10/156:10 am
DCA
- ISP
1 stop5h 45m
Southwest
Deal found 6/9![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 8/106:45 am
ISP
- DCA
1 stop8h 45m
Southwest
Fri 8/216:00 am
DCA
- ISP
1 stop5h 55m
Southwest
Deal found 6/9![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 7/235:20 am
ISP
- DCA
1 stop6h 40m
Southwest
Fri 7/245:25 pm
DCA
- ISP
1 stop6h 20m
Southwest
Deal found 6/9![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 6/10. 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 7/76:25 am
ISP
- DCA
1 stop5h 35m
Southwest
Wed 7/154:40 pm
DCA
- ISP
1 stop6h 00m
Southwest
Deal found 6/10![Southwest logo]()
$367
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 June 11, 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 June 11, 2026.
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:35 pm
ISP
- PIT
2 stops9h 15m
Southwest
Mon 9/145:35 am
PIT
- ISP
1 stop4h 05m
Southwest
Deal found 6/8![Southwest logo]()
$215
This JetBlue deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:58 pm
ISP
- DCA
1 stop6h 35m
JetBlue
Tue 7/143:10 pm
DCA
- ISP
1 stop6h 34m
JetBlue
Deal found 6/8![JetBlue logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:57 am
ISP
- PHL
2 stops24h 25m
Multiple Airlines
Wed 8/197:20 am
PHL
- ISP
1 stop3h 57m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:35 pm
ISP
- PIT
1 stop5h 05m
Southwest
Sun 9/276:35 am
PIT
- ISP
1 stop3h 20m
Southwest
Deal found 6/8![Southwest logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/710:48 am
ISP
- LGA
2 stops12h 39m
Frontier
Fri 9/118:29 pm
LGA
- ISP
1 stop13h 04m
Frontier
Deal found 6/7![Frontier logo]()
$459
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:50 pm
ISP
- PIT
1 stop5h 45m
Southwest
Mon 7/274:45 pm
PIT
- ISP
1 stop7h 00m
Southwest
Deal found 6/6![Southwest logo]()
$243
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:05 am
ISP
- PIT
2 stops9h 00m
Southwest
Tue 7/712:45 pm
PIT
- ISP
1 stop3h 15m
Southwest
Deal found 6/7![Southwest logo]()
$259
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 9/36:45 am
ISP
- DCA
1 stop8h 45m
Southwest
Sat 9/511:55 am
DCA
- ISP
1 stop7h 35m
Southwest
Deal found 6/9![Southwest logo]()
$273
This JetBlue deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:58 pm
ISP
- DCA
1 stop6h 35m
JetBlue
Wed 7/153:10 pm
DCA
- ISP
1 stop6h 34m
JetBlue
Deal found 6/8![JetBlue logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:27 pm
ISP
- PHL
2 stops18h 55m
Multiple Airlines
Tue 7/147:20 am
PHL
- ISP
1 stop9h 27m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$405
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:00 am
ISP
- LGA
1 stop8h 45m
JetBlue
Wed 7/1512:00 pm
LGA
- ISP
1 stop9h 44m
JetBlue
Deal found 6/9![JetBlue logo]()
$398
This Southwest deal was found by Cheapflights users on 6/9. 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 9/2611:55 am
ISP
- PIT
2 stops8h 45m
Southwest
Sun 9/276:00 am
PIT
- ISP
1 stop6h 05m
Southwest
Deal found 6/9![Southwest logo]()
$305
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:00 am
ISP
- JFK
1 stop8h 54m
JetBlue
Wed 7/1512:00 pm
JFK
- ISP
1 stop9h 44m
JetBlue
Deal found 6/9![JetBlue logo]()
$403
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 10/125:00 pm
ISP
- DCA
1 stop5h 55m
Southwest
Thu 10/156:10 am
DCA
- ISP
1 stop5h 45m
Southwest
Deal found 6/9![Southwest logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/145:27 pm
ISP
- PHL
2 stops18h 55m
Multiple Airlines
Tue 7/216:33 pm
PHL
- ISP
1 stop24h 28m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$457
This Priceline deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:07 pm
ISP
- DCA
1 stop7h 30m
JetBlue
Mon 7/133:10 pm
DCA
- ISP
1 stop6h 34m
JetBlue
Deal found 6/8![JetBlue logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:27 pm
ISP
- PHL
1 stop17h 44m
Multiple Airlines
Sat 6/2710:01 am
PHL
- ISP
1 stop7h 28m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$469
This Southwest deal was found by Cheapflights users on 6/10. 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 7/35:50 pm
ISP
- PIT
1 stop5h 40m
Southwest
Mon 7/65:50 pm
PIT
- ISP
1 stop5h 50m
Southwest
Deal found 6/10![Southwest logo]()
$331
This JetBlue deal was found by Cheapflights users on 6/9. 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.
Tue 6/305:00 pm
ISP
- PHL
1 stop6h 51m
JetBlue
Tue 7/77:00 am
PHL
- ISP
1 stop7h 12m
JetBlue
Deal found 6/9![JetBlue logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/127:49 pm
ISP
- LGA
2 stops26h 54m
Multiple Airlines
Sun 7/198:29 pm
LGA
- ISP
1 stop13h 24m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 6/10. 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 10/910:20 am
ISP
- PIT
1 stop9h 00m
Southwest
Sun 10/115:10 pm
PIT
- ISP
1 stop6h 25m
Southwest
Deal found 6/10![Southwest logo]()
$349
This Expedia deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:07 pm
ISP
- LGA
1 stop7h 55m
JetBlue
Wed 7/86:30 am
LGA
- ISP
1 stop7h 42m
JetBlue
Deal found 6/6![JetBlue logo]()
$462
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 8/106:45 am
ISP
- DCA
2 stops7h 55m
Southwest
Fri 8/216:00 am
DCA
- ISP
1 stop5h 55m
Southwest
Deal found 6/9![Southwest logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:49 pm
ISP
- PHL
2 stops35h 26m
Multiple Airlines
Sat 7/119:57 am
PHL
- ISP
1 stop7h 32m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$533
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:30 am
ISP
- PIT
1 stop7h 40m
Southwest
Fri 9/41:45 pm
PIT
- ISP
2 stops8h 20m
Southwest
Deal found 6/6![Southwest logo]()
$356
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:07 pm
ISP
- LGA
1 stop7h 57m
JetBlue
Tue 7/147:30 am
LGA
- ISP
1 stop12h 52m
JetBlue
Deal found 6/9![JetBlue logo]()
$477
This Expedia deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:07 pm
ISP
- JFK
1 stop8h 57m
JetBlue
Wed 7/86:50 am
JFK
- ISP
1 stop7h 22m
JetBlue
Deal found 6/6![JetBlue logo]()
$483
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:20 am
ISP
- DCA
1 stop6h 40m
Southwest
Sun 7/126:55 am
DCA
- ISP
1 stop9h 45m
Southwest
Deal found 6/9![Southwest logo]()
$372
This JetBlue deal was found by Cheapflights users on 6/9. 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.
Thu 7/96:00 am
ISP
- DCA
1 stop8h 15m
JetBlue
Sun 7/123:10 pm
DCA
- ISP
1 stop6h 34m
JetBlue
Deal found 6/9![JetBlue logo]()
$493
This JetBlue deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 pm
ISP
- JFK
1 stop7h 41m
JetBlue
Sat 9/512:30 pm
JFK
- ISP
1 stop9h 04m
JetBlue
Deal found 6/6![JetBlue logo]()
$508
Last-minute flights from Islip to PennsylvaniaDiscover last-minute flight deals from Islip to Pennsylvania. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pennsylvania. Data last updated June 11, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:52 pm
ISP
- PIT
1 stop20h 22m
Frontier
Sun 6/287:09 pm
PIT
- ISP
1 stop25h 48m
Frontier
Deal found 6/7![Frontier logo]()
$300
This Southwest deal was found by Cheapflights users on 6/10. 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 7/35:50 pm
ISP
- PIT
1 stop5h 40m
Southwest
Mon 7/65:50 pm
PIT
- ISP
1 stop5h 50m
Southwest
Deal found 6/10![Southwest logo]()
$331
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:30 pm
ISP
- PIT
1 stop5h 35m
Southwest
Tue 7/712:45 pm
PIT
- ISP
1 stop3h 15m
Southwest
Deal found 6/7![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 6/10. 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 7/56:45 am
ISP
- PIT
1 stop6h 45m
Southwest
Sat 7/115:25 pm
PIT
- ISP
1 stop5h 50m
Southwest
Deal found 6/10![Southwest logo]()
$360
This Southwest deal was found by Cheapflights users on 6/10. 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 7/76:25 am
ISP
- DCA
1 stop5h 35m
Southwest
Wed 7/154:40 pm
DCA
- ISP
1 stop6h 00m
Southwest
Deal found 6/10![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:25 am
ISP
- DCA
1 stop5h 35m
Southwest
Wed 7/154:40 pm
DCA
- ISP
1 stop6h 00m
Southwest
Deal found 6/8![Southwest logo]()
$382
This JetBlue deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:58 pm
ISP
- DCA
1 stop6h 35m
JetBlue
Tue 7/143:10 pm
DCA
- ISP
1 stop6h 34m
JetBlue
Deal found 6/8![JetBlue logo]()
$383
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:20 am
ISP
- DCA
1 stop6h 40m
Southwest
Sun 7/126:55 am
DCA
- ISP
1 stop9h 45m
Southwest
Deal found 6/9![Southwest logo]()
$372
This Booking.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:43 am
ISP
- PIT
1 stop7h 32m
Frontier
Sun 7/197:13 pm
PIT
- ISP
1 stop14h 40m
Frontier
Deal found 6/6![Frontier logo]()
$302
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:50 pm
ISP
- PIT
1 stop5h 45m
Southwest
Mon 7/274:45 pm
PIT
- ISP
1 stop7h 00m
Southwest
Deal found 6/6![Southwest logo]()
$243
This Southwest deal was found by Cheapflights users on 6/9. 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.
Thu 7/235:20 am
ISP
- DCA
1 stop6h 40m
Southwest
Fri 7/245:25 pm
DCA
- ISP
1 stop6h 20m
Southwest
Deal found 6/9![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/275:20 am
ISP
- DCA
1 stop10h 35m
Southwest
Tue 7/284:40 pm
DCA
- ISP
1 stop6h 00m
Southwest
Deal found 6/8![Southwest logo]()
$387
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 June 11, 2026.
Search for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:10 am
ISP
- PIT
1 stop6h 00m
Southwest
Deal found 6/9![Southwest logo]()
$112
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:50 pm
ISP
- PIT
1 stop5h 45m
Southwest
Deal found 6/9![Southwest logo]()
$122
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/173:05 pm
ISP
- PIT
2 stops9h 50m
Southwest
Deal found 6/9![Southwest logo]()
$127
This Trip.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/249:52 pm
ISP
- PIT
1 stop20h 22m
Frontier
Deal found 6/8![Frontier logo]()
$145
This Southwest deal was found by Cheapflights users on 6/10. 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 10/910:20 am
ISP
- PIT
1 stop9h 00m
Southwest
Deal found 6/10![Southwest logo]()
$161
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:45 am
ISP
- DCA
1 stop8h 45m
Southwest
Deal found 6/6![Southwest logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:57 am
ISP
- PHL
2 stops31h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$178
This Frontier deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1810:43 am
ISP
- PIT
1 stop7h 32m
Frontier
Deal found 6/6![Frontier logo]()
$179
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/95:20 am
ISP
- DCA
1 stop6h 40m
Southwest
Deal found 6/7![Southwest logo]()
$184
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 7/205:20 am
ISP
- DCA
1 stop10h 35m
Southwest
Deal found 6/9![Southwest logo]()
$189
This Priceline deal was found by Cheapflights users on 6/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:07 pm
ISP
- DCA
1 stop7h 30m
JetBlue
Deal found 6/10![JetBlue logo]()
$192
This Travelocity deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/43:39 pm
ISP
- JFK
1 stop8h 25m
JetBlue
Deal found 6/8![JetBlue logo]()
$202
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 June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $209 (Southwest) |
One-way from | $112 (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 June 11, 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
Fri 9/11
12:35 pm-9:50 pm
2 stops9h 15m
Pittsburgh
Mon 9/14
5:35 am-9:40 am
1 stop4h 05m
$215
Quickest round-trip
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Thu 9/24
12:35 pm-5:40 pm
1 stop5h 05m
Pittsburgh
Sun 9/27
6:35 am-9:55 am
1 stop3h 20m
$219
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Thu 7/23
5:50 pm-11:35 pm
1 stop5h 45m
Pittsburgh
Mon 7/27
4:45 pm-11:45 pm
1 stop7h 00m
$243
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Sat 7/4
9:05 am-6:05 pm
2 stops9h 00m
Pittsburgh
Tue 7/7
12:45 pm-4:00 pm
1 stop3h 15m
$259
IslipWashington, D.C.
ISP - DCA
ISPDCA
Islip Long Island
Thu 9/3
6:45 am-3:30 pm
1 stop8h 45m
Washington, D.C. Reagan-National
Sat 9/5
11:55 am-7:30 pm
1 stop7h 35m
$273
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Sat 9/26
11:55 am-8:40 pm
2 stops8h 45m
Pittsburgh
Sun 9/27
6:00 am-12:05 pm
1 stop6h 05m
$305
IslipWashington, D.C.
ISP - DCA
ISPDCA
Islip Long Island
Mon 10/12
5:00 pm-10:55 pm
1 stop5h 55m
Washington, D.C. Reagan-National
Thu 10/15
6:10 am-11:55 am
1 stop5h 45m
$310
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Fri 7/3
5:50 pm-11:30 pm
1 stop5h 40m
Pittsburgh
Mon 7/6
5:50 pm-11:40 pm
1 stop5h 50m
$331
IslipPittsburgh
ISP - PIT
ISPPIT
Islip Long Island
Fri 10/9
10:20 am-7:20 pm
1 stop9h 00m
Pittsburgh
Sun 10/11
5:10 pm-11:35 pm
1 stop6h 25m
$349
IslipWashington, D.C.
ISP - DCA
ISPDCA
Islip Long Island
Mon 8/10
6:45 am-2:40 pm
2 stops7h 55m
Washington, D.C. Reagan-National
Fri 8/21
6:00 am-11:55 am
1 stop5h 55m
$352
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-AVP
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-AVP
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 June 11, 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.
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Islip to Pennsylvania. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Islip to Pennsylvania
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Pennsylvania by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Islip to Pennsylvania by cabin class
Find flights from Islip to Pennsylvania, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Islip and Pennsylvania flights
Browse other Islip and Pennsylvania flight options. Last updated on June 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Islip to Pennsylvania flights
Consider these flights traveling from Islip to Pennsylvania.
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 June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$183 | Average$325 | FlexibilityNo cancel fee | On-time63% |