Flights operated by American Airlines, but not using the Bombardier CRJ, were not affected by the heat. Airline officials said both larger Boeing and Airbus aircrafts had higher maximum operating temperatures – 126 degrees and 127 degrees, respectively.
The cancelled flights were scheduled to leave or land in Phoenix between 3 p.m. and 6 p.m. local time, during the hottest part of the day, according to the Republic.
It's not the first time temperatures have led to cancelled flights at Sky Harbor. Airline officials grounded all flights from Phoenix for a short time on June 26, 1990, when temperatures reached 122 degrees, according to KPHO.