Apirchik:
You could do alot better on TWA:
JFK-PHL(94 actual miles) earns you their minimum of 750 miles.
Flying this route 267 times, means you've flown 25098 actual miles.
You'd earn 200,250 miles(not counting any elite bonuea).
For 50,000 miles you can fly LAX-KWI(8827 miles each way). doing this 4 times nets you
70,616 miles flown.