How long is the flight from Philippines to narita japan?

A random search for flights from MNL to NRT on 26Jun,Fri shows: 4hr 20min Northwest Airlines Flt 80 Dep 08:10am 1-way Economy US$ 381 + Taxes US$ 24 Nonstop

6hr 20min Northwest Airlines via NGO Flt72/Flt 78 Dep 06:45am US$ 381 + Taxes US$ 24

Layover Time at Nagoya (NGO) 1hr 0min