This is your safest bet, the equivalent of a warm blanket and a cup of tea. You walk to the central bus station at Heathrow (signs will guide you, but look for the lost souls clutching suitcases). The coach takes about 60 to 90 minutes, depending on how much the M25 motorway hates you that day.
Pro tip: Book your ticket online in advance. If you buy it at the station, the cost skyrockets faster than your blood pressure. The coach is surprisingly comfortable—leather seats, USB ports, and a driver who plays the role of “calm professional” while you silently judge the other passengers.
One shocking fact: Over 2 million people make this trip every year. You are not alone. You are a statistic, but a brave one. Just don’t fall asleep, or you might wake up in Brighton, which is a lovely seaside town but not Gatwick.