Checked bags: weight limit and dimensions by airline

50 lb (23 kg) per bag in Economy at most airlines on this chart, and 70 lb (32 kg) in premium cabins or as the absolute per-bag maximum. Frontier is lower at 40 lb. Anything over the free allowance pays an overweight fee per bag, per direction, on top of the ordinary bag fee.

The standard checked bag size is 62 linear inches (158 cm): length plus width plus height, measured outside with wheels and handles. A 28 x 19 x 12 inch suitcase is 59 linear inches and fits; most 30 inch suitcases run 62 to 66 inches and risk an oversize fee. Allegiant allows 80 linear inches and Emirates uses 150 cm on piece-concept routes.

70 lb (32 kg) is the heaviest bag most airlines will accept at all, even with an overweight fee, because of handler safety rules; bags over that must ship as cargo. Between 50 and 70 lb the bag is accepted with a fee at most airlines on this chart.