Others do not. In either case, your permanent membership card should be mailed to you in three to six weeks. It is your responsibility to give your frequent flyer number to a travel agent or airline representative when making reservations. They are not responsible for knowing that you're a member of their frequent flyer program and, in many cases, do not have access to your number. Keep your membership number with you.
Most airlines issue a special newsletter just for frequent flyer members.
Be sure to read it carefully for special deals and other benefits of your membership. Be sure to report any name or address changes immediately to your airline's frequent flyer department. If you leave your job, check to see if your frequent flyer membership is actually registered to your employer. If it is, the company may choose to give you the miles you've accumulated while traveling for them. Using the miles you've accumulated When making a reservation for a free trip, most airlines require anywhere from seven to 21 days advance booking.