Plan a leg

Two idents. The distance, the track to steer as you leave, the cruise levels the semicircular rule offers, and roughly how long it takes in the sort of aircraft people fly here. No winds, because there is no wind model behind this and pretending otherwise would be worse than saying so. If you would rather be told where to go, say so below and it will pick something.

Find me a route

Answer as much or as little as you like. It will not offer you a leg the aeroplane cannot make, a runway it cannot get into, or a destination the airline has never flown to.

Both ends are needed. Four letter ICAO idents, like EGLL or KSEA.