Kadena Air Base to Louis Armstrong New Orleans International Airport
Approx. 12556 km - about 14h 02m in the air and 15h 20m total from gate to gate, at an average speed around 894 km/h.
Real-world flights on routes this long almost always include at least one stop. Use this nonstop estimate as a guide, and allow extra time for connections and layovers when planning your trip.