$96 Cheap Flights from Islip (ISP) to Ponce (PSE)

View $96 flight on Fri, Apr 10, 2026Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Ponce (PSE-Mercedita)

Cheap Flights from Islip to Ponce (ISP-PSE)

Prices were available within the past 7 days and start at $96 for one-way flights and $386 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$386 Roundtrip, found 2 days ago
$386
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $386 found 2 days ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$401 Roundtrip, found 1 day ago
$401
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $401 found 1 day ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$435 Roundtrip, found 2 days ago
$435
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $435 found 2 days ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$450 Roundtrip, found 1 day ago
$450
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $450 found 1 day ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$465 Roundtrip, found 2 days ago
$465
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $465 found 2 days ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$480 Roundtrip, found 1 day ago
$480
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $480 found 1 day ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$533 Roundtrip, found 2 days ago
$533
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $533 found 2 days ago
Frontier Airlines
Mon, Mar 9 - Mon, Mar 16
ISP
Islip
PSE
Ponce
$548 Roundtrip, found 1 day ago
$548
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Mar 9 from Islip to Ponce, returning Mon, Mar 16, priced at $548 found 1 day ago
Cape Air
Fri, Mar 27 - Sun, Apr 5
ISP
Islip
PSE
Ponce
$855 Roundtrip, found 6 days ago
$855
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Mar 27 from Islip to Ponce, returning Sun, Apr 5, priced at $855 found 6 days ago
Cape Air
Fri, Mar 27 - Sun, Apr 5
ISP
Islip
PSE
Ponce
$867 Roundtrip, found 6 days ago
$867
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Mar 27 from Islip to Ponce, returning Sun, Apr 5, priced at $867 found 6 days ago

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Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Mercedita Airport (PSE) cost?
Secure a cheap one-way flight from $96 or cheap return flight from $386 from MacArthur Airport (ISP) to Mercedita Airport (PSE) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Mercedita Airport (PSE)?
March is the cheapest month to fly from ISP to PSE. Traveling outside of peak seasons is often the key to finding better fares.
What is the cheapest airline that flies from MacArthur Airport (ISP) to Mercedita Airport (PSE)?
To find the cheapest airline flying from ISP to PSE, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from MacArthur Airport (ISP) to Mercedita Airport (PSE)?
Nonstop flights from MacArthur Airport (ISP) to Mercedita Airport (PSE) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ISP to PSE?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Mercedita Airport (PSE)?
Opt for a flight from MacArthur Airport (ISP) to Mercedita Airport (PSE) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Mercedita Airport (PSE) last-minute?
Booking your plane ticket from ISP to PSE shortly before your journey is usually more expensive. However, if you're flexible with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book an ISP to PSE flight and hotel package?
You'll generally save money by securing an ISP to PSE flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your preferred accommodations and flights, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Mercedita Airport (PSE)?
If you reserved your ISP to PSE flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
MacArthur
Destination airport
Mercedita
Roundtrip price
$385
Distance
1620 mi

Book with confidence

Islip to Ponce Flights

The cheapest times to fly from Islip to Ponce

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Ponce are during the month of March. You can find some of the cheapest flights from Islip to Ponce with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Ponce

Sunday is one of the best days to book for cheap flights from Islip to Ponce: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Ponce

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Ponce in 2026. You can also book with separate airlines for your outbound and return journeys, from $96 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Ponce flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Ponce airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Islip to Ponce Flights

*Flight schedules are subject to change.

*Available to One Key members.