Denver-based Frontier Airlines, dogged by consumer complaints in the past few months, improved its on-time performance slightly in May, according to FlightStats reports released Tuesday.
About 25.4 percent of Frontier’s mainline flights were delayed in May by an average of 60.8 minutes, compared with 26.3 percent delayed in April for an average of 57.5 minutes.
Frontier had 8,445 scheduled flights in May, according to , which, compares the on-time arrival performance of major, regional and low-cost airlines around the world.
On time is defined within 15 minutes of scheduled arrival time.
The improvement moved Frontier, the third largest carrier at Denver International Airport, to up one place to No. 11 in the ranking of major North American airlines.
Southwest Airlines, the second-largest carrier at DIA, ranked No. 8 in May, down from No. 5 the month before, as 20.6 percent of its 109,362 scheduled flights were delayed for an average of 54.5 minutes. In April, 16.5 percent of its flights did not arrive on time, delayed for an average of 47.1 minutes.
United Airlines was steady at No. 9, with 22 percent of its 58,628 scheduled flights delayed for an average of 63.2 minutes in May. The month before, DIA’s largest carrier had delays on 19.6 percent of its flights for an average of 61.5 minutes.
Among the 12 largest North American airlines, WestJet had the best on-time performance record, with 7.1 percent of its 13,843 scheduled flights delayed, compared bottom ranked Spirit which had 36.1 percent of 11,156 scheduled flights delayed in May.
