Here's what a A321 NEO (CFM Leap 1A 35K thrust) can do on LAX JFK. At the mid point we were burning 2700/hr per side, slightly more than a regular A319. My only gripe is the same as the old 321, not enough wing = down in the low to mid 30s the whole way. We stayed at FL350 the whole way as I was not willing to endure the east coast chop this week with a 20 knot margin at 370. After the usual tour of NYC we landed with 9K fuel. We had every seat full, 185 pax.

A NEO 319/320 would be hard to beat on trip fuel.