It’s simple: Only book early-morning flights. That’s it. That’s the trick.

Nabbing a seat on a morning flight, especially during the summer, will virtually ensure your flight won’t be delayed.

At least that’s what Denver meteorologist Chris Bianchi told Business Insider’s senior science reporter Morgan McFall-Johnsen. He learned the hard way: In June, he was stuck overnight at New York’s LaGuardia Airport after booking an evening flight.

“I broke the one rule you should never ever break,” Bianchi said in a TikTok video. “Never book a flight in the afternoon, or especially at night, during the summertime months in the United States.”

Morgan explains that the summer months in the US, and the heat and humidity they bring, are prone to create thunderstorms, wreaking havoc on flight patterns.

Even if your plane isn’t in the path of a thunderstorm, your flight schedule can still be affected.

“Weather in other cities can really disrupt your travel plans,” Bianchi added. It doesn’t help that delays can also have a ripple effect, since late planes affect subsequent departures.

As for Bianchi, he finally made it home after he boarded a 7 p.m. flight the next day.