Could Overweight Airline Passengers Endanger Your Life? Passengers keep getting bigger. Now airlines must account more accurately for that. The Federal Aviation Administration is requiring updates to passenger and baggage weight estimates that airlines use to keep each flight within airplane safety limits. Each U.S. airline must submit a plan by June 12 explaining which average weights for passengers and baggage they’ll use, down to phones and clothing, and how they estimated those weights. The FAA must approve each airline’s plan. Airline officials say the weight estimates used for passengers and baggage are going up between 5% and 10%. That will affect some flights, possibly requiring that more passengers get bumped or more baggage left behind. Impact is likelier on unusually hot days and in cities higher above sea level, when the weight an airplane can safely carry is reduced because wings won’t generate as much lift. Flights into stiff headwinds that require more fuel also may face more weight issues.