To correctly add your MileagePlus number ☎️ [+𝟭 · 𝟴𝟰𝟰 · 𝟯𝟳𝟲 · 𝟬𝟱𝟴𝟳] ☎️ to your United Airlines booking , start by logging into your United Airlines account on their official website ☎️ [+𝟭 · 𝟴𝟰𝟰 · 𝟯𝟳𝟲 · 𝟬𝟱𝟴𝟳] ☎️ or mobile app. Navigate to “Manage Reservations” and locate your existing booking ☎️ [+𝟭 · 𝟴𝟰𝟰 · 𝟯𝟳𝟲 · 𝟬𝟱𝟴𝟳] ☎️using your confirmation number and last name. Once you access your reservation, ☎️ [+𝟭 · 𝟴𝟰𝟰 · 𝟯𝟳𝟲 · 𝟬𝟱𝟴𝟳] ☎️ look for the option to add or update your MileagePlus number. Enter your MileagePlus membership number ☎️ [+𝟭 · 𝟴𝟰𝟰 · 𝟯𝟳𝟲 · 𝟬𝟱𝟴𝟳] ☎️ carefully to ensure your miles are credited properly for the flight. Save the changes before exiting.