New York to Tokyo: what the JFK to NRT corridor looks like
- Departure
- John F. Kennedy International Airport, New York, the United States
- Arrival
- Tokyo Narita International Airport, Tokyo, Japan
- Great-circle distance
- 10,830 km (5,848 nm)
- Typical airborne time
- 13h 06m
- Usual cruise levels
- FL320 to FL410
- Initial track
- northwest bound
Route overview
The JFK to NRT sector connects John F. Kennedy International Airport in New York, the United States, with Tokyo Narita International Airport in Tokyo, Japan. Measured along the great circle the two airports are 10,830 km apart, roughly 5,848 nautical miles, which is close to 13h 06m in the air before winds and routing are taken into account. The initial track is northwest bound, and the middle of the route sits in subtropical latitudes.
The East Asian jet stream
Along the way the track passes over the open Atlantic. The East Asian jet stream dominates the winds along this track. Its core is narrow and its position moves day to day, which is why dispatchers replan the route each cycle. Clear air turbulence sits at the edges of that core, and the WAFS forecast shows where it is expected before the flight departs.
Cruise altitudes on this sector
Ultra long sectors begin cruise lower, often near FL320 because of the fuel load, and finish two or three step climbs higher, up to FL400 or FL410. Choice of level matters because turbulence is layered: a change of two or three thousand feet often puts the aircraft into calmer air, and that is one of the first adjustments a crew will request.
Seasonal pattern
The East Asian jet stream peaks in winter and weakens through the summer, so late summer and early autumn sectors are usually the smoothest on this corridor.
Flying this route with less worry
It is worth remembering that turbulence of the kind found on the JFK to NRT track is uncomfortable and entirely within what the aircraft is built for. Wings are designed to flex, the flight is planned around the forecast, and the crew adjusts level or track when it helps. The live forecast above shows the current picture for this corridor so there are fewer surprises on the day.