You generally cannot contact Star Alliance directly by phone for issues regarding your flights, miles, or bookings. Star Alliance is an administrative organization that manages the partnership between 26 different airlines (like Lufthansa, United, and Singapore Airlines); they do not have a central customer service department that handles individual passenger reservations. If you have a problem with a flight, you must contact the operating airline directly using their specific customer service number. For questions about your frequent flyer status or redeeming miles, you must call the airline program where you hold your membership (e.g., calling United MileagePlus for a flight booked with miles on ANA). In 2026, the Star Alliance website provides a "Customer Relations" directory that lists the contact numbers for all member airlines, but they do not maintain a "Star Alliance Hotline." If you are at an airport and encounter a connection issue, look for a "Star Alliance Transfer Desk," where staff from the member airlines can assist you with rebooking across the network.