Originally Posted by
mnredfox
JFK-LHR and JFK-LAX/SFO may be similar in time, but different in service (in some cases). JFK-LHR is mostly served by 764 or 744's meaning DL's new flatbed BE, but all JFK-SFO flights and some JFK-LAX flights are still being run on the old 752s.
The length of these flights is very similar and the main difference in J is the food service - slightly less on the LAX/SFO/SEA.
Also DL uses the 764 and 763 on LHR routes.