With your airline ticket, would you like to add "Ascend" or "Lift?" Perhaps you prefer "Choice Seats" or "Choice Plus?" Or maybe you're a "Main Cabin Select," "Main Cabin Extra" or even "Main Cabin Express" traveler?
Air passengers increasingly are facing such choices when they log in to carriers' websites. Borrowing a marketing practice from auto makers, phone companies and others, airlines are moving quickly to bundle options in packages designed to get customers to spend more.