On-Time Performance: The reporting carriers posted an on-time arrival rate of 78.7 percent in March, up from both the 77.6 percent on-time rate in March 2014 and the 72.8 percent mark in February 2015. 

Cancellations: The reporting carriers canceled 2.2 percent of their scheduled domestic flights in March, up from the 1.9 percent cancellation rate posted in March 2014, but an improvement over the 4.8 percent rate in February 2015. 

Chronically Delayed Flights: At the end of March, there were 10 flights that were chronically delayed – more than 30 minutes late more than 50 percent of the time – for three consecutive months.  There were an additional 26 regularly scheduled flights that were chronically delayed for two consecutive months.  There were no chronically delayed flights for four consecutive months or more. A list of flights that were chronically delayed for a single month is available from BTS. 

Causes of Flight Delays: In March, the carriers filing on-time performance data reported a total of 19.6 percent delay – 5.61 percent of their flights were delayed by aviation system delays, compared to 6.88 percent in February; 6.86 percent by late-arriving aircraft, compared to 7.76 percent in February; 5.97 percent by factors within the airline’s control, such as maintenance or crew problems, compared to 6.44 percent in February; 0.47 percent by extreme weather, compared to 1.07 percent in February; and 0.03 percent for security reasons, equal to 0.03 percent in February. 

Weather: Weather is a factor in both the extreme-weather category and the aviation-system category. This includes delays due to the re-routing of flights by DOT’s Federal Aviation Administration in consultation with the carriers involved.  Weather is also a factor in delays attributed to late-arriving aircraft, although airlines do not report specific causes in that category. Data collected by BTS also shows the percentage of late flights delayed by weather, including those reported in either the category of extreme weather or included in National Aviation System delays. In March, 26.57 percent of late flights were delayed by weather, up from 24.72 percent in March 2014 and down from 34.77 percent in February. 

Mishandled Baggage: The U.S. carriers reporting flight delays and mishandled baggage data posted a mishandled baggage rate of 3.42 reports per 1,000 passengers in March, down from both March 2014’s rate of 3.66 and February 2015’s rate of 3.92.  For the first quarter of this year, the carriers posted a mishandled baggage rate of 3.86 reports per 1,000 passengers, down from the 4.42 rate for the first quarter of 2014. 

Bumping: The report also includes airline reports of involuntary denied boarding, or bumping, for the first quarter of this year.  The 14 U.S. carriers who report on-time performance and mishandled baggage data posted a bumping rate of 0.85 per 10,000 passengers for the quarter, down from the 1.37 rate reported for the first quarter of 2014. 

Incidents Involving Animals: In March, carriers reported three incidents involving the loss, injury, or death of animals while traveling by air, down from the five reports filed in in February 2015.  March’s incidents involved the deaths of three animals. 

Complaints About Treatment of Disabled Passengers: The report also contains a tabulation of complaints filed with DOT in March against airlines regarding the treatment of passengers with disabilities.  The Department received a total of 52 disability-related complaints in March, down from both the 66 complaints received in March 2014 and the 56 complaints received in February 2015.  For the first quarter of this year, the Department received 163 disability-related complaints, down from the total of 176 filed during the first quarter of 2014. 

Complaints About Discrimination: In March, the Department received three complaints alleging discrimination by airlines due to factors other than disability – such as race, religion, national origin, or sex – down from both the total of four recorded in March 2014 and the five recorded in February 2015.  For the first quarter of this year, the Department received 14 discrimination complaints, down from the total of 17 filed during the first quarter of 2014. 

Carriers and Tarmac Data Filed by All Carriers

Overall 78.7 percent on-time arrivals 

Highest On-Time Arrival Rates - 

Hawaiian Airlines – 87.3 percent
Alaska Airlines – 85.6 percent
Delta Air Lines – 84.0 percent 

Lowest On-Time Arrival Rates  

Frontier Airlines – 65.2 percent
Envoy Air – 67.8 percent
JetBlue Airways – 71.5 percent 
Domestic Flights with Longest Tarmac Delays Exceeding Three Hours 
Allegiant Air flight 2986 from Punta Gorda, Fla. to Niagara Falls, N.Y., 3/1/15 – delayed on tarmac 184 minutes in Cleveland 
International Flights with Longest Tarmac Delays Exceeding Four Hours 

Highest Rates of Canceled Flights

Envoy Air – 7.2 percent
ExpressJet Airlines – 3.9 percent
American Airlines – 3.1 percent 

Lowest Rates of Canceled Flights