But Latest Figures Indicate Fewer On-Time Operations Than Were
Reported The Previous Month
The nation’s largest airlines’ on-time arrival
performance in June 2011 was an improvement from June 2010, but
down from May 2011, according to the Air Travel Consumer Report
released Tuesday by the U.S. DOT. Information filed with the Bureau
of Transportation Statistics (BTS), a part of DOT’s Research
and Innovative Technology Administration, shows that the 16
carriers reporting on-time performance recorded an overall on-time
arrival rate of 76.9 percent in June, up from the 76.4 percent
on-time rate of June 2010 but down from May 2011’s 77.1
The monthly report also includes data on lengthy tarmac delays,
on-time performance, chronically delayed flights, flight
cancellations, and the causes of flight delays filed with the
Department by the reporting carriers. In addition, the report
contains information on airline bumping, reports of mishandled
baggage filed by consumers with the carriers, and consumer service,
disability and discrimination complaints received by DOT’s
Aviation Consumer Protection Division. This report also includes
reports of incidents involving pets traveling by air, as required
to be filed by U.S. carriers.
The carriers filing on-time performance with the Department
reported 14 total tarmac delays of more than three hours in June,
compared to three in June 2010 and 16 in May 2011. Five of the
tarmac delays occurred at Chicago’s O’Hare Airport on
June 21 and three at Washington Dulles Airport on June 16, all
taking place on days the areas experienced storms. All of the
reported tarmac delays are under investigation by the Department.
During June, the carriers canceled 1.8 percent of their scheduled
domestic flights, compared to 1.5 percent in June 2010 and 2.1
percent in May 2011.
At the end of June, there were four 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 six 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.
Carriers filing on-time performance data reported that 6.06
percent of their June flights were delayed by aviation system
delays, compared to 6.67 percent in May; 8.15 percent by
late-arriving aircraft, compared to 7.71 percent in May; 6.10
percent by factors within the airline’s control, such as
maintenance or crew problems, compared to 5.47 percent in May; 0.67
percent by extreme weather, compared to 0.68 percent in May; and
0.04 percent for security reasons, compared to 0.05 percent in May.
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 the FAA 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 June, 36.70 percent of late flights were delayed by weather,
down 9.23 percent from June 2010, when 40.43 percent of late
flights were delayed by weather, and down 13.55 percent from May
when 42.45 percent of late flights were delayed by weather.
The U.S. carriers reporting flight delays and mishandled baggage
data posted a mishandled baggage rate of 3.57 reports per 1,000
passengers in June, down from June 2010’s rate of 3.65, but
up from May 2011’s rate of 3.52. For the first six months of
the year, the carriers posted a mishandled baggage rate of 3.57 per
1,000 passengers, down from the 3.61 rate for the first half of