Mobile devices are not just proliferating among travelers; they’re constant travel companions. Prosper Mobile Insights surveyed US smartphone and tablet owners and found that as of March 2012 approximately 98% took their mobile devices with them on vacation; nearly four in five respondents in this group used them “all the time.” And in-flight is very much a key time when travelers turn to their mobile devices. According to FlightView’s “2012 Flyer Survey,” more than four in five US travelers polled used their smartphones while flying. About two in five respondents used laptops when on a plane, and a similar proportion used tablets. Though smartphones are currently the dominant device in use on the plane, fliers are increasingly turning to their tablets. According to TripAdvisor’s annual air travel study, 37% of respondents considered their tablet an “essential” in-flight accessory - a 5% increase from the 2012 survey. Get the full story at eMarketer