The "one hand bag rule" is a strict cabin baggage policy primarily enforced by certain airlines (like Ryanair or Spirit) and in specific regions, most notably on flights within or departing from India. In 2026, this rule dictates that each passenger is permitted only one piece of cabin baggage weighing no more than 7kg to 10kg. Unlike many full-service carriers that allow a suitcase plus a "personal item" (like a laptop bag or purse), the one-bag rule means everything must fit inside that single piece of luggage. If you arrive at the gate with a suitcase and a separate handbag, you may be forced to consolidate them or pay a heavy fine to check one into the hold. Many airlines in the UK and Europe have relaxed this slightly to allow a "small under-seat bag" for free, but for the "Strict" version of the rule, it literally means one single item. Always check your specific boarding pass, as "Priority" bookings often grant you the right to bypass this rule and bring a second, smaller item.