Looks about 11,500 ft on GE.
How does a 737 use all of that, even with max flex?
Normally see them use up to about 6,000 ft to get airborne, so with max flex (75% thrust I guess) instead of full thrust, I would have thought 8 to 9,000 ft to get airborne.
It may have been an intersection T.O. of course. Never liked the idea of leaving good runway behind.