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Tuesday, November 10, 2026Nov 10

How hot is too hot aboard an airliner? The law doesn’t say

This June 22, 2017 photo provided by Maria de Los Angeles-Baida shows Emily France with her 4-month-old son Owen in Denver. France who says the infant overheated on a delayed United Airlines flight at Denver's airport, has hired an attorney and hopes the Federal Aviation Administration takes note. (Maria de Los Angeles-Baida via AP)
This June 22, 2017 photo provided by Maria de Los Angeles-Baida shows Emily France with her 4-month-old son Owen in Denver. France who says the infant overheated on a delayed United Airlines flight at Denver's airport, has hired an attorney and hopes the Federal Aviation Administration takes note. (Maria de Los Angeles-Baida via AP) This June 22, 2017 photo provided by Maria de Los Angeles-Baida shows Emily France with her 4-month-old son Owen in Denver. France who says the infant overheated on a delayed United Airlines flight at Denver's airport, has hired an attorney and hopes the Federal Aviation Administration takes note. (Maria de Los Angeles-Baida via AP)

DENVER (AP) – Every day, tens of thousands of U.S. airline passengers settle into their seats, lower the window shades and reach up to twist the air vents without the benefit of something that might do even more to keep them cool: a rule setting temperature limits inside the cabin.

Airlines have their own guidelines – some allowing the mercury to hit 90 degrees Fahrenheit (32 Celsius) – and federal regulations cover air flow and, more generally, passenger safety and comfort.

But nowhere do authorities say how hot is too hot when a plane is sitting on the ground – a fact illustrated this summer when a mother holding her beet-red infant had to plead to be let off a broiling regional jet stuck on the tarmac at Denver International Airport.

Emily France said she and her 4-month-old son, Owen, sweltered aboard the 50-seat “oven with wings” for more than an hour June 22 before it returned to the gate and passengers were allowed off briefly.

When they re-boarded the United Airlines flight to El Paso, Texas, the cabin felt even warmer, France said. With the flight delayed again, she stripped off Owen’s clothing and applied ice bags brought by flight attendants, but his condition deteriorated.