1-888-595-2181 Passengers find Alaska Airlines baggage policy useful for knowing the specifications of items that are approved for taking on the flight. Alaska Airlines accepts checked baggage only upon payment of the applicable charges and within 4 hours of the scheduled departure time (3 hours in Vancouver and 2 hours in Calgary). To avoid additional charges, each bag, including those accepted free of charge, must weigh 50 lbs or less and have a maximum dimension of 62 linear inches (length + height + width).