Cheap Flights from Islip (ISP) to Tri-Cities (TRI)

Popular airlines from MacArthur Airport (ISP) to Tri-Cities, TN (TRI-Tri-Cities Regional)

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Cheap Flights from Islip to Tri-Cities (ISP-TRI)

Prices were available within the past 7 days and start at for one-way flights and $1,152 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Wed, Dec 24 - Thu, Dec 25
ISP
Islip
TRI
Tri-Cities
$1,152 Roundtrip, found 1 day ago
$1,152
Roundtrip
found 1 day ago
Select Cape Air flight, departing Wed, Dec 24 from Islip to Tri-Cities, returning Thu, Dec 25, priced at $1,152 found 1 day ago
Cape Air
Mon, Dec 22 - Thu, Dec 25
ISP
Islip
TRI
Tri-Cities
$1,245 Roundtrip, found 1 day ago
$1,245
Roundtrip
found 1 day ago
Select Cape Air flight, departing Mon, Dec 22 from Islip to Tri-Cities, returning Thu, Dec 25, priced at $1,245 found 1 day ago

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI) cost?
Secure a cheap one-way flight or cheap return flight from $1,152 from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI) 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 Tri-Cities Regional Airport (TRI)?
Flying in December is a great way to save, as it's the cheapest month for flights between ISP and TRI. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest ISP to TRI flight.
How many flights per day from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI)?
Nonstop flights from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ISP to TRI?
You'll typically 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 Tri-Cities Regional Airport (TRI)?
Select a flight from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour 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 Tri-Cities Regional Airport (TRI) last-minute?
Holding off until right before your break to book your flight from ISP to TRI often results in higher prices. While you might find some last-minute deals, there's no guarantee. Keep your travel plans flexible to boost your chances of scoring a bargain.
Is it cheaper to book an ISP to TRI flight and hotel package?
You can save money by booking an ISP to TRI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your preferred accommodations and flights, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Tri-Cities Regional Airport (TRI)?
If you booked your ISP to TRI flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type 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, go to our Customer Service portal if you'd like more information.

Travel information

Origin airport
MacArthur
Destination airport
Tri-Cities Regional
Roundtrip price
$1,151
Distance
583 mi

Book with confidence

Islip to Tri-Cities Flights

The cheapest times to fly from Islip to Tri-Cities

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 Tri-Cities are during the month of December. You can find some of the cheapest flights from Islip to Tri-Cities with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Tri-Cities

Sunday is one of the best days to book for cheap flights from Islip to Tri-Cities: 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 Tri-Cities

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 Tri-Cities in 2026. You can also book with separate airlines for your outbound and return journeys, from 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 Tri-Cities 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 Tri-Cities 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 Tri-Cities Flights

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*Available to One Key members.