$173 Cheap Flights from Islip (ISP) to Ponce (PSE)

View $173 flight on Sun, Nov 2, 2025Opens in a new window

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

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Islip to Ponce (ISP-PSE)

Prices were available within the past 7 days and start at $173 for one-way flights and $296 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Dec 5 - Sun, Dec 7
ISP
Islip
PSE
Ponce
$296 Roundtrip, just found
$296
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Dec 5 from Islip to Ponce, returning Sun, Dec 7, priced at $296 just found
Frontier Airlines
Thu, Oct 30 - Fri, Nov 7
ISP
Islip
PSE
Ponce
$336 Roundtrip, found 4 days ago
$336
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Ponce, returning Fri, Nov 7, priced at $336 found 4 days ago
Frontier Airlines
Fri, Oct 31 - Fri, Nov 7
ISP
Islip
PSE
Ponce
$345 Roundtrip, found 4 days ago
$345
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Oct 31 from Islip to Ponce, returning Fri, Nov 7, priced at $345 found 4 days ago
Frontier Airlines
Sun, Nov 2 - Mon, Nov 10
ISP
Islip
PSE
Ponce
$346 Roundtrip, found 1 day ago
$346
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 2 from Islip to Ponce, returning Mon, Nov 10, priced at $346 found 1 day ago
Frontier Airlines
Fri, Dec 5 - Sun, Dec 7
ISP
Islip
PSE
Ponce
$354 Roundtrip, just found
$354
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Dec 5 from Islip to Ponce, returning Sun, Dec 7, priced at $354 just found
Frontier Airlines
Sun, Nov 2 - Fri, Nov 7
ISP
Islip
PSE
Ponce
$356 Roundtrip, found 1 day ago
$356
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 2 from Islip to Ponce, returning Fri, Nov 7, priced at $356 found 1 day ago
Frontier Airlines
Thu, Oct 30 - Mon, Nov 10
ISP
Islip
PSE
Ponce
$376 Roundtrip, found 1 day ago
$376
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Ponce, returning Mon, Nov 10, priced at $376 found 1 day ago
Frontier Airlines
Thu, Oct 30 - Fri, Nov 7
ISP
Islip
PSE
Ponce
$386 Roundtrip, found 1 day ago
$386
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Ponce, returning Fri, Nov 7, priced at $386 found 1 day ago
Frontier Airlines
Fri, Oct 31 - Mon, Nov 10
ISP
Islip
PSE
Ponce
$387 Roundtrip, found 1 day ago
$387
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 31 from Islip to Ponce, returning Mon, Nov 10, priced at $387 found 1 day ago
JetBlue Airways
Fri, Oct 31 - Tue, Nov 11
ISP
Islip
PSE
Ponce
$572 Roundtrip, found 6 days ago
$572
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Fri, Oct 31 from Islip to Ponce, returning Tue, Nov 11, priced at $572 found 6 days ago

Alternative airports near Ponce

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Mercedita PSE. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $786
PSE
Mercedita
CheapestClosest
Average driving time to city center8 min
Flights from $786

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Mercedita Airport (PSE) cost?
Secure a cheap one-way flight from $173 or cheap return flight from $296 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)?
December 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
Airlines serving
Frontier Airlines, JetBlue Airways
Roundtrip price
$296
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 December. 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 2025. You can also book with separate airlines for your outbound and return journeys, from $173 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

Explore a world of travel with Expedia

*Available to One Key members.