Frontier and JetBlue Lead List of Most Delayed Airlines in the U.S. in 2025

Flighty, a flight tracking app, released its 2025 Global Passport Report revealing which airlines are the most delayed. In 2025, Flighty travelers took over 22 million flights for a cumulative 78 million hours in the air. Of those, 3.9 million hours account for the time lost between when passengers arrived late to their destinations versus when the airlines said they would arrive.

Globally, Ryanair is the most delayed airline among Flighty users, but in the U.S. the top spot goes to Frontier Airlines, followed by JetBlue Airways and Southwest Airlines. Legacy carriers American Airlines and Alaska Airlines took the number four and number five spots, respectively.

A new Flighty metric in this year’s report also measures the gap between a flight’s scheduled arrival and when passengers actually got off the plane. Things like runway congestion, taxiing, unavailable gates, and holding patterns typically account for this “lost” time.

In 2025, three out of 10 flights tracked by Flighty were extended, accounting for about six million flights. The total extra time spent sitting and waiting to get to the gate added up to 1.4 million hours, or about 14 extra minutes per flight.