3. Economy-class syndrome (DVT)
Though the name “deep vein thrombosis” sounds a little scarier, it’s a lot harder to spin into a marketing campaign to encourage people to fly first class. Sure, blood clots due to extended flying are uncommon, but if you’re over 40, obese, pregnant, on birth control, had recent surgery, or are on hormone replacement therapy, your chances have just increased. Then again, if you’ve somehow managed to be all of those, well, blood clots are the least of your problems.
4. Going deaf
Did you really think the hull's aluminum and plastic were protecting you from airplane noise when they couldn’t even protect poor Bill Shatner from an ape man on a wing? Ha! The average decibel level on a commercial flight can reach 110 decibels, and usually levels off at about 85. The National Institute for Occupational Safety and Health (NIOSH) occupational says the safety limit is 88 decibels for a duration of four hours, and 85 decibels for eight hours; which means if you’re crossing oceans regularly, you may find yourself watching Matlock at uncomfortably high volumes sooner than you think.