tower en route flight

A flight which is not controlled (at any time) by an ARTCC.
In general, it is a flight which is provided departure and
arrival service by one or more terminal area facilities. In
the high density NAS Terminal area there are two types:
(a) intra-facility (arrives and departs within the NAS
Terminal area), (b) inter-facility (arrives from, or departs
to, an airport outside the NAS Terminal area)- See Pogo.