A new survey from the Travel Leaders Group reveals that courtesy in the air does not necessarily translate to courtesy once on the ground.

When confronted with limited overhead space for carry-on bags near their assigned seats, only 4.3 percent of survey-takers would stow luggage at the earliest open spot, while nearly 75 percent would wait until they approached their seat.

Another question asked respondents how long they would wait before taking a beach chair that someone had 'saved' and then abandoned. Here, Americans were much more divided. While 24 percent would claim the seat within the first hour, another 30 percent would wait over four hours.

In other words, while Americans agree that it's rude to put carry-on luggage in overhead space that's far from their assigned seats, they cannot agree on when, if ever, the right time to reclaim a "saved" beach seat.

For full results of the survey, which polled 2,719 consumers April 6-29, see here.

Peter Schlesinger is a research assistant at Travel + Leisure and a member of the Trip Doctor news team. You can find him on Twitter at @pschles08.