You climb aboard, find your economy seat, then try to stash a bag in the overhead. Too late. All filled up. You attempt to tuck it under your seat, but the guy next to you already has all the space filled with several of his bloated carry-ons.

To help ease the stashing problems on future flights, United Continental now limits passengers in lowest cost seats to one carry-on and one under-seat each. Further restrictions on larger bags will not allow them in the overhead bins, and require them to be checked before flights.