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$86+ Cheap flights from Islip, NY to Pittsburgh (ISP - PIT)

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PIT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Islip to Pittsburgh

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Pittsburgh (PIT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$143
(Southwest)

One-way from

$86
(Southwest)

Popular in

January

Cheapest in

September

Average price

$376
From Islip Long Island to Pittsburgh
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One-way flight from Islip Long Island to Pittsburgh
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Highest demand for flights based on searches. 29% potential increase in price ($149 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Islip to Pittsburgh

Cheapest flights from Islip to Pittsburgh
Explore the most affordable flight options available from Islip to Pittsburgh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

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.
Tue 9/95:30 amISP - PIT
1 stop5h 50mSouthwest
Tue 9/1612:05 pmPIT - ISP
1 stop3h 05mSouthwest
Deal found 8/12$143
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 10/35:35 pmISP - PIT
1 stop6h 00mSouthwest
Mon 10/66:00 pmPIT - ISP
1 stop5h 45mSouthwest
Deal found 8/12$171
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.
Wed 8/278:00 amISP - PIT
1 stop25h 15mMultiple Airlines
Sun 8/317:08 amPIT - ISP
1 stop16h 51mMultiple Airlines
Deal found 8/12$281
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 8/286:05 amISP - PIT
1 stop11h 00mMultiple Airlines
Mon 9/16:29 pmPIT - ISP
1 stop29h 30mMultiple Airlines
Deal found 8/13$302
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 10/95:30 amISP - PIT
1 stop6h 20mSouthwest
Fri 10/106:00 pmPIT - ISP
1 stop5h 45mSouthwest
Deal found 8/12$307
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 8/266:05 amISP - PIT
1 stop27h 10mMultiple Airlines
Tue 9/27:08 amPIT - ISP
1 stop16h 51mMultiple Airlines
Deal found 8/13$315
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/229:58 amISP - PIT
1 stop10h 03mFrontier
Sun 8/244:49 pmPIT - ISP
2 stops15h 19mFrontier
Deal found 8/14$347

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Pittsburgh 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, 2025.
Use the filters below to find and compare flights from Islip to Pittsburgh that are best for you.

Fly from

Islip

Fly to

Pittsburgh

Route

Depart

Return

Price

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Tue 9/9

5:30 am-11:20 am

1 stop5h 50m

Pittsburgh

Tue 9/16

12:05 pm-3:10 pm

1 stop3h 05m

$143

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Fri 10/3

5:35 pm-11:35 pm

1 stop6h 00m

Pittsburgh

Mon 10/6

6:00 pm-11:45 pm

1 stop5h 45m

$171

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 8/27

8:00 am-9:15 am

1 stop25h 15m

Pittsburgh

Sun 8/31

7:08 am-11:59 pm

1 stop16h 51m

$281

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Thu 8/28

6:05 am-5:05 pm

1 stop11h 00m

Pittsburgh

Mon 9/1

6:29 pm-11:59 pm

1 stop29h 30m

$302

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Thu 10/9

5:30 am-11:50 am

1 stop6h 20m

Pittsburgh

Fri 10/10

6:00 pm-11:45 pm

1 stop5h 45m

$307

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Tue 8/26

6:05 am-9:15 am

1 stop27h 10m

Pittsburgh

Tue 9/2

7:08 am-11:59 pm

1 stop16h 51m

$315

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Sat 10/11

6:05 am-4:00 pm

1 stop9h 55m

$86

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Thu 8/21

6:05 am-6:17 pm

1 stop12h 12m

$138

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Fri 8/22

9:58 am-8:01 pm

1 stop10h 03m

$155

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Thu 10/16

11:40 am-7:11 pm

2 stops7h 31m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 12 results
1
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Best time to book a flight from Islip to Pittsburgh

Have a flexible travel schedule? Discover the best time to fly to Pittsburgh from Islip with our price prediction graph.
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 Pittsburgh

What is the cheapest month to book a flight from Islip, New York to Pittsburgh?

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Pittsburgh (average of $262). Flying from Islip, New York to Pittsburgh in November is currently the most expensive (average of $333). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ISP to PIT?

Find hourly flight availability from Islip to Pittsburgh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

When flying from Islip, New York to Pittsburgh, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Pittsburgh

Get insights into the airlines that provide service to Pittsburgh. 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 Pittsburgh. Reviews last updated August 14, 2025.
Read through reviews of airlines operating flights from Islip to Pittsburgh, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Islip to Pittsburgh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Islip, New York to Pittsburgh round-trip?

    Southwest, at $229, was found to be the cheapest airline from Islip, New York to Pittsburgh.. Users have found that Southwest is 37% cheaper than the other options available to this destination.

  • Can I find deals for flights from Islip to Pittsburgh that include hotel bookings?

    Yes. In addition to deals on Islip to Pittsburgh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Pittsburgh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Pittsburgh.

  • Can I find deals for business class flights from Islip to Pittsburgh?

    Yes. Cheapflights offers flight deals from Islip to Pittsburgh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Pittsburgh?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Pittsburgh (average of $262). Flying from Islip, New York to Pittsburgh in November is currently the most expensive (average of $333). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Pittsburgh?

Book flights to Pittsburgh if you plan to visit one of these locations
Mars
Steubenville
Monroeville
Washington
Wexford
Belle Vernon

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Alternative routes for Islip to Pittsburgh

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Islip to Pittsburgh

Discover the top airline that operate flights from Islip to Pittsburgh. 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, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$229Average$326FlexibilityNo cancel feeOn-time63%

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