$121+ Cheap flights from Islip, NY (ISP) to Pennsylvania
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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Cheapest flights from Islip to PennsylvaniaExplore the most affordable flight options available from Islip to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
Explore the most affordable flight options available from Islip to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:43 pm -
1 stop20h 04m
Thu 10/87:51 pm -
1 stop22h 09m
Deal found 9/2![Frontier logo]()
$182
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 -
1 stop5h 50m
Mon 10/56:00 pm -
1 stop5h 40m
Deal found 8/31![Southwest logo]()
$201
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/153:10 pm -
1 stop3h 55m
Fri 10/166:00 pm -
1 stop5h 40m
Deal found 9/2![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 -
1 stop3h 55m
Thu 10/85:50 am -
1 stop8h 40m
Deal found 9/3![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/154:25 pm -
1 stop8h 00m
Mon 11/1612:20 pm -
1 stop3h 55m
Deal found 8/31![Southwest logo]()
$261
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 -
1 stop3h 55m
Sat 10/310:30 am -
1 stop5h 40m
Deal found 9/4![Southwest logo]()
$275
This Lucky2Go deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lucky2Go is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:48 pm -
2 stops28h 30m
Tue 9/295:45 pm -
1 stop23h 13m
Deal found 8/31![Frontier logo]()
$292
This Frontier deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:43 pm -
1 stop6h 26m
Wed 9/237:15 am -
1 stop9h 43m
Deal found 9/1![Frontier logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/2811:52 am -
1 stop25h 43m
Wed 9/307:15 am -
1 stop9h 43m
Deal found 9/4![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/312:00 pm -
1 stop4h 27m
Sun 10/46:00 am -
1 stop12h 03m
Deal found 9/1![Multiple Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
1 stop6h 20m
Fri 10/165:35 pm -
1 stop5h 40m
Deal found 9/3![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 11/45:05 pm -
1 stop5h 50m
Sun 11/86:10 am -
2 stops9h 25m
Deal found 9/4![Southwest logo]()
$362
Best flights from Islip to PennsylvaniaDiscover carefully curated flight deals from Islip to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
Discover carefully curated flight deals from Islip to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:20 pm -
1 stop4h 10m
Sat 10/1010:30 am -
1 stop5h 40m
Deal found 9/3![Southwest logo]()
$201
This Lucky2Go deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lucky2Go is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:48 pm -
2 stops28h 30m
Tue 9/295:45 pm -
1 stop23h 13m
Deal found 8/31![Frontier logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/312:00 pm -
1 stop4h 27m
Sun 10/46:00 am -
1 stop12h 03m
Deal found 9/1![Multiple Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 -
1 stop5h 50m
Mon 10/56:00 pm -
1 stop5h 40m
Deal found 9/1![Southwest logo]()
$201
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 -
1 stop3h 55m
Thu 10/85:50 am -
1 stop8h 40m
Deal found 9/3![Southwest logo]()
$216
This Expedia deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/247:00 am -
1 stop13h 03m
Thu 10/112:00 pm -
1 stop11h 22m
Deal found 8/31![JetBlue logo]()
$584
This Frontier deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:43 pm -
1 stop6h 26m
Wed 9/237:15 am -
1 stop9h 43m
Deal found 9/1![Frontier logo]()
$304
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/154:25 pm -
1 stop8h 00m
Mon 11/1612:20 pm -
1 stop3h 55m
Deal found 9/2![Southwest logo]()
$276
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 -
2 stops9h 05m
Sat 10/310:30 am -
1 stop5h 40m
Deal found 9/4![Southwest logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/186:48 pm -
1 stop16h 14m
Tue 9/229:30 am -
1 stop25h 50m
Deal found 9/3![Multiple Airlines logo]()
$400
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Thu 9/245:43 pm -
1 stop6h 26m
Wed 9/307:15 am -
1 stop9h 43m
Deal found 9/3![Frontier logo]()
$376
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/1511:00 am -
2 stops8h 55m
Fri 10/164:20 pm -
2 stops7h 20m
Deal found 9/2![Southwest logo]()
$296
This Frontier deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:43 pm -
1 stop6h 26m
Fri 10/95:15 am -
1 stop12h 45m
Deal found 9/2![Frontier logo]()
$396
This JetBlue deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
1 stop7h 07m
Wed 10/77:30 am -
1 stop8h 06m
Deal found 8/31![JetBlue logo]()
$592
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/266:00 am -
1 stop5h 55m
Mon 9/286:00 am -
1 stop5h 55m
Deal found 9/2![Southwest logo]()
$397
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Thu 10/15:43 pm -
1 stop6h 26m
Thu 10/810:37 am -
1 stop6h 53m
Deal found 9/3![Frontier logo]()
$481
This JetBlue deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am -
1 stop7h 59m
Wed 10/73:50 pm -
1 stop7h 32m
Deal found 9/2![JetBlue logo]()
$607
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2710:30 am -
1 stop8h 20m
Wed 9/306:00 am -
1 stop8h 55m
Deal found 9/3![Southwest logo]()
$397
This JetBlue deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/17:00 am -
1 stop7h 58m
Thu 10/87:07 am -
1 stop7h 10m
Deal found 8/31![JetBlue logo]()
$610
This Frontier deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Thu 9/245:43 pm -
1 stop6h 26m
Sun 9/276:00 am -
1 stop12h 03m
Deal found 9/3![Frontier logo]()
$533
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/2210:20 am -
1 stop5h 45m
Thu 9/246:00 am -
1 stop5h 55m
Deal found 9/2![Southwest logo]()
$428
This Priceline deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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.
Thu 9/247:00 am -
1 stop7h 07m
Thu 10/112:00 pm -
1 stop11h 22m
Deal found 8/31![JetBlue logo]()
$629
This Priceline deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Fri 10/27:05 am -
1 stop5h 29m
Thu 10/86:30 am -
1 stop7h 00m
Deal found 9/3![Multiple Airlines logo]()
$796
This Priceline deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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.
Fri 10/29:05 am -
1 stop3h 29m
Fri 10/96:50 am -
1 stop5h 40m
Deal found 9/4![Multiple Airlines logo]()
$798
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/26:55 am -
1 stop9h 00m
Fri 10/95:35 pm -
1 stop5h 40m
Deal found 9/4![Southwest logo]()
$453
This FlightHub deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/164:26 pm -
1 stop16h 11m
Fri 9/188:15 am -
1 stop15h 07m
Deal found 9/2![JetBlue logo]()
$727
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/2210:20 am -
1 stop5h 45m
Wed 9/236:00 am -
1 stop8h 55m
Deal found 9/3![Southwest logo]()
$459
This United deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/185:34 pm -
2 stops20h 28m
Mon 9/218:00 pm -
2 stops21h 41m
Deal found 9/2![Multiple Airlines logo]()
$877
This FlightHub deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:00 am -
1 stop16h 09m
Fri 9/184:00 pm -
1 stop7h 22m
Deal found 9/2![JetBlue logo]()
$741
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 -
2 stops10h 40m
Fri 9/181:00 pm -
1 stop8h 35m
Deal found 8/31![Southwest logo]()
$464
Last-minute flights from Islip to PennsylvaniaDiscover last-minute flight deals from Islip to Pennsylvania. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pennsylvania. Data last updated September 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/175:43 pm -
1 stop15h 22m
Mon 9/215:45 pm -
2 stops19h 13m
Deal found 9/2![Multiple Airlines logo]()
$370
This Southwest deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 9/215:00 pm -
1 stop6h 15m
Tue 9/226:10 am -
1 stop6h 00m
Deal found 9/1![Southwest logo]()
$284
This Lucky2Go deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lucky2Go is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:48 pm -
2 stops28h 30m
Tue 9/295:45 pm -
1 stop23h 13m
Deal found 8/31![Frontier logo]()
$292
This Frontier deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:43 pm -
1 stop6h 26m
Wed 9/237:15 am -
1 stop9h 43m
Deal found 9/1![Frontier logo]()
$304
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 -
1 stop5h 50m
Mon 10/56:00 pm -
1 stop5h 40m
Deal found 8/31![Southwest logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/2811:52 am -
1 stop25h 43m
Wed 9/307:15 am -
1 stop9h 43m
Deal found 9/4![Multiple Airlines logo]()
$327
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:43 pm -
1 stop20h 04m
Thu 10/87:51 pm -
1 stop22h 09m
Deal found 9/2![Frontier logo]()
$182
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 -
1 stop3h 55m
Thu 10/85:50 am -
1 stop8h 40m
Deal found 9/3![Southwest logo]()
$216
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 -
1 stop3h 55m
Sat 10/310:30 am -
1 stop5h 40m
Deal found 9/4![Southwest logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/312:00 pm -
1 stop4h 27m
Sun 10/46:00 am -
1 stop12h 03m
Deal found 9/1![Multiple Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
1 stop6h 20m
Fri 10/165:35 pm -
1 stop5h 40m
Deal found 9/3![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/153:10 pm -
1 stop3h 55m
Fri 10/166:00 pm -
1 stop5h 40m
Deal found 9/2![Southwest logo]()
$211
One-way flights from Islip to PennsylvaniaSearch for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
Search for one-way flight options from Islip to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This CheapOair deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:43 pm -
1 stop20h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$121
This CheapOair deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:55 pm -
1 stop24h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/55:43 pm -
2 stops23h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$176
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:25 am -
1 stop5h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/1612:55 pm -
2 stops7h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Southwest logo]()
$181
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/83:10 pm -
1 stop3h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Southwest logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:00 pm -
3 stops24h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 9/2210:20 am -
1 stop5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Southwest logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/2312:00 pm -
3 stops33h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$201
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/281:15 pm -
2 stops10h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:10 pm -
2 stops9h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Southwest logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/2811:52 am -
3 stops29h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Multiple Airlines logo]()
$222
Find flight deals from Islip to Pennsylvania
Keep the following information in mind while searching for Islip to Pennsylvania flight deals. Data was last updated September 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $182 (CheapOair) |
One-way from | $121 (CheapOair) |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Pennsylvania that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 5, 2026.
Use the filters below to find and compare flights from Islip to Pennsylvania that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Wed 9/16
5:43 pm-1:47 pm
1 stop20h 04m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$121
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Wed 9/16
12:55 pm-8:50 pm
2 stops7h 55m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$181
Quickest round-trip
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Thu 10/8
3:10 pm-7:05 pm
1 stop3h 55m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$184
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Mon 9/28
5:00 pm-11:55 pm
1 stop6h 55m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Tue 9/22
10:20 am-4:05 pm
1 stop5h 45m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Sat 10/3
12:20 pm-4:30 pm
1 stop4h 10m
Pittsburgh
Sat 10/10
10:30 am-4:10 pm
1 stop5h 40m
$201
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Mon 9/28
4:05 pm-9:55 pm
1 stop5h 50m
Pittsburgh
Mon 10/5
6:00 pm-11:40 pm
1 stop5h 40m
$201
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Fri 10/9
3:10 pm-12:20 am
2 stops9h 10m
Pittsburgh
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$209
IslipPittsburgh
ISP Islip Long Island - PIT Pittsburgh
ISPPIT
Islip Long Island
Fri 10/2
3:10 pm-7:05 pm
1 stop3h 55m
Pittsburgh
Thu 10/8
5:50 am-2:30 pm
1 stop8h 40m
$216
IslipWashington, D.C.
ISP Islip Long Island - DCA Washington, D.C. Reagan-National
ISPDCA
Islip Long Island
Sat 10/10
6:25 pm-12:04 pm
2 stops41h 39m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$228
Showing 1-10 of 53 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-LGA
ISP-DCA
ISP-PHL
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-LGA
ISP-DCA
ISP-PHL
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Pennsylvania
Get insights into the airlines that provide service to Pennsylvania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pennsylvania. Reviews last updated September 5, 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
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
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.
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Alternative routes for Islip to Pennsylvania
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Islip and Pennsylvania flights
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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 7,457,451 searches. Data last updated September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$240 | Average$325 | FlexibilityNo cancel fee | On-time63% |