The term FLIGHT DESTINATION can be broken down into two crossword solutions: NEST (4 letters) and UPSTAIRS (8 letters). A FLIGHT DESTINATION is the place where a FLIGHT is going, so these two words can refer to the physical location of the DESTINATION. NEST could refer to a NEST of birds, which could be a metaphor for a place of safety or refuge. UPSTAIRS could refer to a higher level of elevation, such as a mountain peak or a tall building. Both of these words could be used to describe a FLIGHT DESTINATION, depending on the context.