Ya, I just walk off and say goodbye on my way out. No further explanation needed unless there is something crucial to pass like an open write up. If they aren't there, I tell ops and bolt.

My last trip I walked by the oncoming captain and said "all good, have a great day!" and he yelled after me "is it a good jet?" He literally could not fathom that I would pass by him without telling him how the rides were in the opposite direction, my last two reroutes, a bad joke, something about not working too hard, and saying "good jet".