Cheap Frontier Airlines flights Islip (ISP) to Miami (MIA)

You can discover cheap round-trip Frontier Airlines flights from ISP to MIA by sorting your results from “Price (lowest to highest)” on Expedia. Or look for deals for a one-way trip.**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.

Browse for return or one-way flights to Miami in September or October. You could find an affordable fare with Frontier Airlines during these quieter months.

To find cheap Frontier Airlines fares from MacArthur Airport (ISP) to Miami Intl. Airport (MIA), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**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.

Fill in your dates, hit search and tick the “Nonstop” filter on Expedia to find any direct flights from ISP to MIA with Frontier Airlines or other carriers.

Filter your results by “Morning” and “Early Morning” to browse the earliest departures from ISP to MIA. Heading off early means you’re less likely to experience 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 MacArthur Airport (ISP) to Miami touch down at Miami Intl. Airport (MIA). This is the main entry point here.

With a rewarding loyalty program, Frontier Airlines is a top pick for many passengers journeying from ISP to MIA. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are often free within 24 hours of booking, but your airline may charge you after that time. For further information about altering your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to update your itinerary without being charged, apply the “Changes included” or “No cancel fee” filter when organizing your next break.