What travel apps integrate with calendars, and what features would you suggest they include?

Several travel apps integrate with calendars, enhancing the user experience by providing seamless planning and organization. Apps like TripIt and Google Trips automatically sync travel itineraries, flight details, and accommodation bookings with your calendar, ensuring you never miss an important event. To further enhance these apps, features such as real-time flight updates, alerts for gate changes, and the ability to add notes about nearby attractions or aking games you want to try could be beneficial.