Extreme Heat Is Raising U.S. Flight-Delay Risks as Airports Face Hotter Conditions

Extreme heat is increasing the risk of flight delays as hotter conditions affect aircraft performance and airport operations, according to an Associated Press report published Aug. 5, 2026.

The report used Las Vegas and Harry Reid International Airport as an example of the aviation stress created by a summer heat wave affecting parts of the United States and Europe. High temperatures can reduce aircraft lift and payload capacity, meaning airlines may need to adjust operations before departure. Those changes can contribute to delays or cancellations, especially when disruptions spread through interconnected airline networks.

Phoenix Sky Harbor International Airport has averaged 43 days per year with temperatures of at least 110 degrees Fahrenheit since 2020, according to an AP analysis. The figure illustrates the increasingly routine operating conditions facing airports in persistently hot regions, though the report did not establish a nationwide count of heat-related delays or cancellations.

The development is an ongoing summer weather impact, not a single completed emergency event. Airlines and airports may continue adjusting operations during periods of extreme heat, while travelers at affected airports face a higher risk of schedule changes as temperatures remain elevated.