The Miles&More Senator, as well as the MileagePlus Gold status or gold tiers of other loyalty programs, include Star Alliance Gold status. But almost every frequent flyer program has its own perks that will be offered to members on flights with the program-operating airline. A Miles&More Senator status, for example, will get you access to the Welcome Lounge after a long-haul flight and you will receive two upgrade vouchers. As a MileagePlus Gold member, you can reserve Economy+ seats and bring two pieces of luggage weighing up to 32kg each on United flights.