flight attendantWhile many travelers tune out safety briefings, pilots understand how important they can be.Adnan Abidi/Reuters

  • Airline passengers tend to notice factors that impact comfort — like seat size, the behavior of nearby passengers, and turbulence.
  • Airline pilots are trained to be attentive to small details that slip by most passengers.
  • Some of these details have serious safety implications.

For most of us, air travel is an opportunity to sleep, work, read, or watch a movie with fewer distractions than you’d find on the ground.

When we do notice our surroundings, we tend to focus on factors that impact our comfort — seat size, the behavior of nearby passengers, turbulence — but for airline pilots and aviation experts, the experience can be different. Pilots and experts are trained to be attentive to small details on planes, so even when they don’t have to fly the plane and can sit in the main cabin, they’ll notice things that other passengers don’t.

We interviewed two airline pilots and collected responses from a Quora thread to find out what pilots notice when they’re flying in the main cabin. Here’s what they said.