$111 Cheap Frontier Airlines flights New Orleans (MSY) to Islip (ISP)

Scoring cheap one-way Frontier Airlines flights from MSY to ISP from $111 on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $225 for your next getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the least expensive months to travel to Islip with Frontier Airlines. You could also find fantastic deals on one-way and round-trip fares in February.

Search for affordable Frontier Airlines flights from Louis Armstrong New Orleans Intl. Airport (MSY) to MacArthur Airport (ISP) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the ideal day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Enter your dates, hit search and select “Nonstop” on Expedia to find any direct flights from MSY to ISP with Frontier Airlines or another carrier.

To find the earliest departure from MSY to ISP with Frontier Airlines, filter your search by “Morning” and “Early Morning.” Choosing an early flight generally means you’ll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Frontier Airlines flights from Louis Armstrong New Orleans Intl. Airport (MSY) to Islip arrive at MacArthur Airport (ISP). This is the main entry point to this city.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to travel from MSY to ISP with Frontier Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* on top of Frontier Airlines’s loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee may apply if you change or cancel your booking more than 24 hours after it’s been confirmed. To secure plane tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes when you look for flights. To learn more about changing or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”