You can add the details for a particular flight to your calendar or you can add the details for all flights in a trip to your calendar. To do this, start on the "My Trips" page and either tap on a trip name in the brown bar or tap on a flight. After navigating to the details of that trip or flight, tap the "share" icon in the lower left corner of the screen (above the static navigation tab buttons). A list of ways to share the flight or trip information is presented to you and one of the choices is "Calendar". Tap the "Calendar" choice and the list of calendars available in your calendar app will appear. Select which calendar to add the flight(s) to and tap the "Done" button. You will see a popup message informing you that the flight or flights associated with the trip have been saved to your calendar. You may navigate to your calendar and view the new entry(ies) for the flight(s).