Many of us have compression socks for traveling. On the day of travel, put them on when you get up; that is when your legs are less swollen. This allows your body to adapt to the socks. Make sure to leave them on for a few hours after you land to again allow your body to adapt. Wearing the socks for the extra time can reduce any swelling of the legs much more effectively than if they are taken straight off. Travel socks do not work unless you wear them. If the ones you have are not comfortable, look for a different kind.