On-time performance (OTP) fell for 8 of the 10 reporting North American airlines for the second consecutive month in July an awas down 3.9 percentage points from June to 71.6%
WestJet led the rankings for the third consecutive month with an OTP of 83.9%, representing a 2.5 percentage-point decline month over month. Alaska Airlines was second at 76.2%, down 4.4 percentage points, while United Airlines finished third at 75.4%, falling just 0.8 percentage points
The two carriers with month-over-month increases were Southwest Airlines, up 3.2 percentage points to 67.2%; and Allegiant, up 0.3 percentage points to 70%

WestJet was the only North American carrier to make Cirium’s list of global on-time airlines at sixth. Saudia topped that list for a third consecutive month at 87.2%
WestJet also had a July completion factor of 99.5%, followed by Alaska at 99%. They were the only two North American carriers with a completion factor above 99% for the month
The number of North American flight cancellations in July was 22,921, compared with 14,128 in June
A flight is considered on time if the aircraft arrives at the gate within 15 minutes of its scheduled arrival time

