To Delete a Trip

Log into your Yapta Account
Select the Trip that contains the Flights and/or Hotels you want to delete
Select Delete this trip link (in the trip header)
Confirm that you want to delete the entire set of flights and Hotels in that trip

This will delete all of the flights and Hotels that are you are tracking that are associated with this trip.  If you do not want to delete all of the flights in this trip you can delete each flight or hotel separately. 

Delete a Hotel   Delete a Flight