What exactly is jet lag?

What exactly is jet lag? Many people complain of jet lag after long flights. But what exactly is jet lag, and what can travelers do to reduce it? In the latest episode of our “Ask the Expert” series, we ask Dr. Elisabeth Wanner, company doctor at SWISS. 

Ask the expert: What exactly is jet lag?

Flying is fascinating! Aviation is as varied as the destinations SWISS flies to. And the numerous unanswered questions and myths about flying are at least as varied and exciting. In the "Ask the Expert" section, we get to the bottom of the facts and offer simple explanations to the big questions. Our experts know the answer to (almost) everything!

Do you have an exciting question of your own? We look forward to your input with the subject "Ask the Expert" to [email protected].

Text & Video: Reto Hoffmann & Mario Schuler

Publication: 15.08.2025