In 2026, a 79 cm bag is not allowed as carry-on but is perfectly acceptable as checked baggage on Air India, provided it meets the total linear dimension requirements. For carry-on, Air India strictly limits dimensions to 55 cm x 40 cm x 20 cm. However, for checked luggage, the "Piece Concept" (used for US/Canada/Europe flights) allows a single bag with a maximum linear dimension (Length + Width + Height) of 158 cm (62 inches). A 79 cm bag is typically a "large" suitcase; if its other two dimensions are roughly 48 cm and 30 cm, it would total 157 cm, squeaking in just under the limit. For domestic and "Weight Concept" flights, the sum of dimensions for two pieces combined must not exceed 272 cm. Always verify your specific ticket's weight allowance—usually 15kg to 25kg for Economy—as exceeding weight is often more common than exceeding size with a 79 cm frame.