Choosing Cruising altitude
Is there a formula for choosing the cruising altitude in relation to total flight distance, just as there is one for calculation TOD?
I'm particular interested in B737-400 info, but i would also like to know if there is a rule of thumb formula that applies to all aircraft.
Since airliners cruise @ approx FL300-350, TOD is about 100NM from destination. I'm a little confused as to how you choose cruising Alt for short flights <100nm.
Capt. Manuvar