Originally posted by siliconengineer:
Wait....there's a regular flight not yet mentioned, LAX to SNA which has got to be less than 50 miles, although I don't know what type of plane.
I did this Friday night on Skywest/UA on EMB120, total 36 miles, flying time 12 minutes!

not a mainline jet flight though. shortest "big plane" flight I've done was CLT-GSO which is about 80 miles and took about 18-20 minutes flying very low with the landing lights on.
NW has a MSP-RST which is 76 miles on DC9s.