$100+ Cheap flights from Pennsylvania to Islip, NY (ISP)
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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Sep 13 — Sep 201
Round-trip
1 adult, Economy
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Find cheap flights from Pennsylvania to Islip 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 Pennsylvania to IslipExplore the most affordable flight options available from Pennsylvania to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
Explore the most affordable flight options available from Pennsylvania to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/14:20 pm -
2 stops7h 15m
Mon 10/55:40 pm -
1 stop5h 50m
Deal found 8/10![Southwest logo]()
$177
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:35 am -
1 stop4h 05m
Thu 9/174:05 pm -
1 stop5h 50m
Deal found 8/13![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 am -
1 stop4h 05m
Mon 9/286:10 am -
1 stop6h 00m
Deal found 8/10![Southwest logo]()
$192
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 am -
1 stop4h 05m
Tue 9/296:05 am -
2 stops9h 05m
Deal found 8/10![Southwest logo]()
$198
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:10 pm -
1 stop6h 00m
Mon 9/216:10 am -
1 stop6h 00m
Deal found 8/12![Southwest logo]()
$213
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:30 pm -
1 stop5h 20m
Wed 9/93:20 pm -
1 stop5h 35m
Deal found 8/13![Southwest logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:16 pm -
1 stop12h 37m
Tue 9/85:27 pm -
1 stop20h 08m
Deal found 8/11![Multiple Airlines logo]()
$231
This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:12 am -
1 stop5h 46m
Thu 9/245:43 pm -
1 stop16h 34m
Deal found 8/12![Frontier logo]()
$231
This Trip.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:12 am -
1 stop5h 46m
Mon 9/145:43 pm -
1 stop16h 34m
Deal found 8/9![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:15 am -
1 stop9h 43m
Wed 9/165:43 pm -
1 stop15h 22m
Deal found 8/10![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:45 pm -
1 stop23h 13m
Wed 9/1612:00 pm -
2 stops20h 41m
Deal found 8/11![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:12 am -
1 stop29h 46m
Mon 9/285:43 pm -
1 stop16h 34m
Deal found 8/11![Frontier logo]()
$238
Best flights from Pennsylvania to IslipDiscover carefully curated flight deals from Pennsylvania to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
Discover carefully curated flight deals from Pennsylvania to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:35 am -
1 stop4h 05m
Thu 9/174:05 pm -
1 stop5h 50m
Deal found 8/13![Southwest logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:15 am -
1 stop9h 43m
Wed 9/1612:00 pm -
2 stops20h 41m
Deal found 8/10![Multiple Airlines logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:15 am -
1 stop9h 43m
Wed 9/165:43 pm -
1 stop15h 22m
Deal found 8/10![Frontier logo]()
$235
This JetBlue deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:29 pm -
1 stop9h 53m
Wed 9/237:00 am -
1 stop7h 59m
Deal found 8/11![JetBlue logo]()
$353
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/14:20 pm -
2 stops7h 15m
Mon 10/53:10 pm -
2 stops9h 05m
Deal found 8/10![Southwest logo]()
$183
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 am -
1 stop4h 05m
Mon 9/286:10 am -
1 stop6h 00m
Deal found 8/10![Southwest logo]()
$192
This Trip.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:12 am -
1 stop5h 46m
Sun 10/45:43 pm -
1 stop16h 34m
Deal found 8/9![Frontier logo]()
$252
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:30 pm -
1 stop5h 20m
Wed 9/93:20 pm -
1 stop5h 35m
Deal found 8/13![Southwest logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:30 am -
1 stop29h 28m
Tue 9/1512:00 pm -
2 stops13h 01m
Deal found 8/9![Multiple Airlines logo]()
$275
This Trip.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:12 am -
1 stop5h 46m
Sun 10/45:43 pm -
1 stop16h 34m
Deal found 8/9![Frontier logo]()
$252
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:30 pm -
1 stop5h 20m
Mon 9/286:10 am -
1 stop6h 00m
Deal found 8/11![Southwest logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:45 pm -
1 stop23h 13m
Fri 9/188:39 pm -
2 stops19h 48m
Deal found 8/12![Multiple Airlines logo]()
$320
This JetBlue deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/194:30 pm -
1 stop6h 52m
Wed 9/237:00 am -
1 stop7h 07m
Deal found 8/10![JetBlue logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:16 pm -
1 stop12h 37m
Tue 9/110:57 am -
2 stops20h 18m
Deal found 8/9![Frontier logo]()
$305
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:30 pm -
1 stop4h 35m
Sun 11/154:25 pm -
1 stop8h 00m
Deal found 8/9![Southwest logo]()
$264
This Expedia deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/244:30 pm -
1 stop6h 52m
Mon 9/287:00 am -
1 stop7h 07m
Deal found 8/9![JetBlue logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:55 am -
1 stop11h 03m
Wed 9/1612:00 pm -
2 stops13h 01m
Deal found 8/10![Multiple Airlines logo]()
$326
This Booking.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:53 pm -
1 stop18h 52m
Sun 10/47:45 pm -
3 stops22h 11m
Deal found 8/9![Breeze Airways logo]()
$789
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:27 am -
1 stop6h 31m
Sun 9/206:48 pm -
1 stop18h 05m
Deal found 8/14![Frontier logo]()
$308
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:10 am -
1 stop4h 05m
Wed 9/26:05 am -
1 stop6h 00m
Deal found 8/12![Southwest logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:55 am -
1 stop11h 03m
Mon 9/2811:52 am -
2 stops33h 32m
Deal found 8/9![Multiple Airlines logo]()
$343
This JetBlue deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:35 pm -
1 stop6h 47m
Fri 9/117:00 am -
1 stop7h 58m
Deal found 8/14![JetBlue logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1910:29 pm -
2 stops18h 29m
Wed 9/235:43 pm -
1 stop7h 18m
Deal found 8/11![Frontier logo]()
$334
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:50 am -
1 stop5h 55m
Sun 10/255:40 am -
1 stop5h 50m
Deal found 8/13![Southwest logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:32 pm -
1 stop17h 45m
Sat 8/297:09 pm -
2 stops27h 24m
Deal found 8/9![Multiple Airlines logo]()
$352
This Orbitz deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:30 pm -
1 stop8h 52m
Wed 9/167:00 am -
1 stop7h 07m
Deal found 8/10![JetBlue logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:55 am -
2 stops13h 10m
Sun 11/14:13 pm -
1 stop18h 14m
Deal found 8/13![Multiple Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:35 pm -
1 stop5h 35m
Wed 10/74:20 pm -
1 stop6h 15m
Deal found 8/13![Southwest logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:55 am -
1 stop11h 03m
Mon 9/285:43 pm -
1 stop7h 18m
Deal found 8/9![Frontier logo]()
$373
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/184:10 pm -
2 stops7h 40m
Mon 10/195:40 pm -
1 stop5h 50m
Deal found 8/9![Southwest logo]()
$301
Last-minute flights from Pennsylvania to IslipDiscover last-minute flight deals from Pennsylvania to Islip. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Islip. Data last updated August 14, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:16 pm -
1 stop12h 37m
Tue 9/85:27 pm -
1 stop20h 08m
Deal found 8/11![Multiple Airlines logo]()
$231
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:30 pm -
1 stop5h 20m
Wed 9/93:20 pm -
1 stop5h 35m
Deal found 8/13![Southwest logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:15 am -
1 stop9h 43m
Wed 9/165:43 pm -
1 stop15h 22m
Deal found 8/10![Frontier logo]()
$235
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:35 am -
1 stop4h 05m
Thu 9/174:05 pm -
1 stop5h 50m
Deal found 8/13![Southwest logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:45 pm -
1 stop23h 13m
Wed 9/1612:00 pm -
2 stops20h 41m
Deal found 8/11![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:45 pm -
1 stop23h 13m
Wed 9/165:43 pm -
1 stop15h 22m
Deal found 8/11![Frontier logo]()
$241
This Trip.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:12 am -
1 stop5h 46m
Mon 9/145:43 pm -
1 stop16h 34m
Deal found 8/9![Frontier logo]()
$232
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:10 pm -
1 stop6h 00m
Mon 9/216:10 am -
1 stop6h 00m
Deal found 8/12![Southwest logo]()
$213
This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:12 am -
1 stop5h 46m
Thu 9/245:43 pm -
1 stop16h 34m
Deal found 8/12![Frontier logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:12 am -
1 stop29h 46m
Mon 9/285:43 pm -
1 stop16h 34m
Deal found 8/11![Frontier logo]()
$238
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 am -
1 stop4h 05m
Tue 9/296:05 am -
1 stop6h 00m
Deal found 8/10![Southwest logo]()
$192
This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:12 am -
1 stop5h 46m
Wed 9/305:43 pm -
1 stop16h 44m
Deal found 8/12![Frontier logo]()
$241
One-way flights from Pennsylvania to IslipSearch for one-way flight options from Pennsylvania to Islip. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
Search for one-way flight options from Pennsylvania to Islip. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Frontier deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1611:12 am -
1 stop5h 46m
Deal found 8/12![Frontier logo]()
$100
This Expedia deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:52 pm -
1 stop17h 01m
Deal found 8/10![Frontier logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1110:10 am -
1 stop30h 48m
Deal found 8/12![Frontier logo]()
$108
This Expedia deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:12 am -
1 stop5h 46m
Deal found 8/11![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:28 pm -
1 stop6h 33m
Deal found 8/10![Frontier logo]()
$120
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
2 stops9h 30m
Deal found 8/13![Southwest logo]()
$123
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:20 pm -
2 stops8h 15m
Deal found 8/12![Southwest logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:39 pm -
2 stops37h 14m
Deal found 8/9![Frontier logo]()
$125
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:30 pm -
1 stop5h 20m
Deal found 8/10![Southwest logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:55 am -
1 stop11h 03m
Deal found 8/13![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:46 pm -
2 stops22h 12m
Deal found 8/12![Multiple Airlines logo]()
$127
This Expedia deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:12 am -
1 stop5h 46m
Deal found 8/13![Frontier logo]()
$129
Find flight deals from Pennsylvania to Islip
Keep the following information in mind while searching for Pennsylvania to Islip flight deals. Data was last updated August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Southwest) |
One-way from | $100 (Frontier) |
Popular in | February |
Cheapest in | March |
Average price | $247 |
Cheapflights Fare Finder
Customize your flight search to find flights from Pennsylvania to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
Use the filters below to find and compare flights from Pennsylvania to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Thu 9/10
5:35 am-9:40 am
1 stop4h 05m
Islip Long Island
Thu 9/17
4:05 pm-9:55 pm
1 stop5h 50m
$179
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Thu 10/1
4:20 pm-11:35 pm
2 stops7h 15m
Islip Long Island
Mon 10/5
3:10 pm-12:15 am
2 stops9h 05m
$183
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Fri 9/25
5:35 am-9:40 am
1 stop4h 05m
Islip Long Island
Mon 9/28
6:10 am-12:10 pm
1 stop6h 00m
$192
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Sat 9/5
3:30 pm-8:50 pm
1 stop5h 20m
Islip Long Island
Wed 9/9
3:20 pm-8:55 pm
1 stop5h 35m
$225
PhiladelphiaIslip
PHL Philadelphia - ISP Islip Long Island
PHLISP
Philadelphia
Wed 9/9
7:15 am-4:58 pm
1 stop9h 43m
Islip Long Island
Wed 9/16
12:00 pm-8:41 am
2 stops20h 41m
$231
PhiladelphiaIslip
PHL Philadelphia - ISP Islip Long Island
PHLISP
Philadelphia
Wed 9/9
7:15 am-4:58 pm
1 stop9h 43m
Islip Long Island
Wed 9/16
5:43 pm-9:05 am
1 stop15h 22m
$235
Washington, D.C.Islip
IAD Washington, D.C. Dulles Intl - ISP Islip Long Island
IADISP
Washington, D.C. Dulles Intl
Fri 10/2
11:12 am-4:58 pm
1 stop5h 46m
Islip Long Island
Sun 10/4
5:43 pm-10:17 am
1 stop16h 34m
$252
Washington, D.C.Islip
IAD Washington, D.C. Dulles Intl - ISP Islip Long Island
IADISP
Washington, D.C. Dulles Intl
Thu 10/1
11:12 am-4:58 pm
1 stop5h 46m
Islip Long Island
Sun 10/4
5:43 pm-10:17 am
1 stop16h 34m
$252
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Sat 9/26
3:30 pm-8:50 pm
1 stop5h 20m
Islip Long Island
Mon 9/28
6:10 am-12:10 pm
1 stop6h 00m
$261
PittsburghIslip
PIT Pittsburgh - ISP Islip Long Island
PITISP
Pittsburgh
Thu 11/12
12:30 pm-5:05 pm
1 stop4h 35m
Islip Long Island
Sun 11/15
4:25 pm-12:25 am
1 stop8h 00m
$264
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Pennsylvania to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Pennsylvania with our price prediction graph.
PIT-ISP
PHL-ISP
IAD-ISP
DCA-ISP
EWR-ISP
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 Pennsylvania to Islip
USPA-ISP
PIT-ISP
PHL-ISP
IAD-ISP
DCA-ISP
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Pennsylvania to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Pennsylvania and Islip flights
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Pennsylvania to Islip flights
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Top airline flying from Pennsylvania to Islip
Discover the top airline that operate flights from Pennsylvania to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$505 | FlexibilityNo cancel fee | On-time63% |