Travel information: We collect travel itinerary information, including the times and dates of upcoming flight, lodging or car rental reservations, from users of our Uber Travel feature. We collect such information: (i) when users manually input their information into an Uber Travel itinerary; or (2) if authorized by users to access their Gmail accounts, from traveled-related email confirmations. If so authorized, Uber will only access users’ Gmail accounts to collect travel itinerary information to enable the Uber Travel feature, and will adhere to Google’s API Services User Data Policy, including the limitations on use of data collected from users’ Gmail accounts.
source: https://www.uber.com/legal/en/document/?country=united-states&lang=en&name=privacy-notice