Originally Posted by
mot29
NW used to fly MSP-SNA-ONT. sna-ont is about 30 miles. 727 as I recall.
noise restrictions at SNA
the flight likely went back to MSP; while they boarded SNA-MSP pax, they only had to fuel for ONT, so could use a lower thrust setting for takeoff and climbout (and every .01 EPR on a 727 made a big difference in the noise pattern)