Travel

Extreme temperatures are forcing flight delays

Extreme heatwaves in parts of the U.S. are forcing airlines to shed fuel, limit passengers, or wait for temperatures to drop in the evenings, to help aircrafts operate.

Break it down: High temperatures make the air less dense, reducing engine performance and the amount of lift airplanes are able to produce. This typically means planes need to be lighter and require more runway in order to take off. As a result, carriers are having to reduce weight on the planes.

Why it matters: Travelers could experience longer travel days this summer as airlines push or reschedule flights due to the extreme heat.

• Allegiant said it will delay flights if there’s a threat to passenger safety or comfort.

• Delta announced that it will load less fuel in some cases and schedule refueling along routes when needed.

Despite their best efforts, the extreme conditions have some airlines struggling to deliver on passenger safety promises.

• Last week a plane sat on that tarmac in Las Vegas for four hours in 115°F heat - without air conditioning - causing some passengers to experience heat-related illness.

Bottom line: Passengers will have to budget more time for travel during the hotter summer months going forward.

• Industry expert Robert Mann said that as temperatures increase, more flights will have to wait to take off until the sun goes down, limit weight, or stop to refuel en route.

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