Originally Posted by
3Cforme
Tomorrow's scheduled durations, LAX-LHR, by operating carrier:
NZ 10:40
BA 10:25 and 10:15
VA 10:45
AA 10:30
DL 11:06
IIRC, NZ, UA and AA all do 777s with a typical cruise speed of 560 mph (according to wikipedia)
BA does 380 with a cruise of 587 mph
DL does 767 with a cruise of 530 mph
I don't know which variant A340
VS uses but both have a higher cruise than 767
Flying 5456 miles at cruising speed (simplifying things) you'd expect a 777 to do it 30 minutes or so faster.
That's not to say that Delta might pad more than others, but I think the plane does have some impact on the times...