When traveling in what direction you are most likely to feel jet leg?

Jet lag is typically more severe when traveling eastward (e.g., from the U.S. to Europe or Asia) compared to traveling westward (e.g., from Europe to the U.S. or Asia to the U.S.). This is because traveling eastward shortens the day, forcing your body to adjust to an earlier sleep schedule, which is harder for most people. In contrast, traveling westward lengthens the day, which is usually easier for the body to adapt to since it involves staying up later, a more natural shift for many people.

The severity of jet lag also depends on factors like the number of time zones crossed, the duration of the flight, and individual differences in how one's body adapts to new time zones.