For most international airlines in 2026, the standard weight limit for a checked bag in Economy Class is 50 lbs (23 kg). For domestic flights or low-cost carriers (like Spirit or Ryanair), the limit is often lower, frequently capped at 40 lbs (18 kg) or requiring a specific fee-based selection. In Premium Economy or Business Class, the allowance usually increases to 70 lbs (32 kg) per bag. It is a strict safety rule that no single bag can exceed 70 lbs (32 kg) due to health and safety regulations for baggage handlers; if a bag is heavier than this, it must be repacked into two separate containers or shipped as cargo. In 2026, many airlines have implemented "smart scales" at self-drop kiosks that charge automatic "heavy bag" fees if you are even 1 lb over the limit, so it is highly recommended to weigh your luggage at home using a digital scale before heading to the airport.