Good question, SS. I've often wondered if they all travel together on the long trip segments (i.e. LA to London, London to Johannesburg/Capetown) or if they take a couple different flights. Large corporations will usually forbid all of their executives from flying on the same plane in the event there would be (Heaven forbid) a crash ... they don't want to lose all of their executive staff. Since Timothy only mentioned Joe in his Tweet, leads me to wonder if Glenn and Don were on a different flight. Obviously, once they reach their first destination it would make sense to travel together between cities within the country.