Tools and information to support your Mileage Plus account. Request mileage credit Request mileage credit from United or any of our air or non-air partners. Find your Mileage Plus number Search for your Mileage Plus number online. Mileage Plus FAQs Change Mileage Plus address Review or update the address or telephone number on your Mileage plus account. Contact Mileage Plus partners Obtain contact information for Star Alliance, airline partners, Mileage Plus credit card and other Mileage Plus partners.