Routing from anywhere to "Albany International Airport" in Albany, NY, USA, fails with "Route not found." GPS enabled, other routes working fine. Rebooted phone, no change.
Where exactly is the target? We had it earlier (for other airports), that it was somewhere on or near runways for planes. Try to set the target manually to a public road. Go to map, tap on public road select as "target" (or destination; I am not aware which term is used in Navigator).