Pilot explains why airlines have become so strict on luggage weight limits

A former pilot turned aviation safety researcher says the stricter carry-on luggage limits now used by airlines are largely driven by safety and aircraft weight constraints—yet the rules vary significantly from one carrier to another. On February 2, 2026, Virgin Australia changed domestic policy: economy passengers can bring one standard-sized cabin bag for the overhead locker up to 8 kg, plus a small personal item that fits under the seat. For international travel, the article cites Air Canada limiting basic fares to one personal article across North and Central America. It also contrasts Qantas and Jetstar, with Jetstar allowing up to 7 kg shared across two items. The explanation: total takeoff weight must remain within certified limits, and regulations use passenger-weight assumptions or weighing in remote routes.