Contrary to popular belief, airlines rarely deny passengers boarding because a flight is oversold. The Department of Transportation's required compensation penalties ensure that airlines make every effort to avoid bumping customers from confirmed itineraries.
However, there are plenty of other, more common reasons airlines block passengers from boarding flights. The good news is that with a little planning and awareness, you can virtually guarantee it won't happen to you.
Unfortunately, it's already too late for the three airline passengers I'm about to tell you about. Each of these travelers showed up at the check-in counter expecting to soon be airborne, but instead found themselves grounded. From passport problems to suspected illnesses and self-created messes, these would-be flyers were all rejected at the airport.
A great solo travel tip spotted this week on The Points Guy Articles.
