Originally Posted by violist

itasoftware.com might be useful for this, taking out some of the
spontaneity but at least getting you to another five letter word
other than Tulsa.

I discover, for example, that I can leave the house here,
immediately get on a USAircraft, and turn around in Tampa
(or stay there some days, my choice), 4 segs and 2500 miles
for $205 all in, not exactly mileage run material, but for 2 hr
in advance it's pretty decent.