AA100 Turbulence ForecastAmerican Airlines · JFK → LHR
About flight AA100
- Airline
- American Airlines (AA)
- Route
- JFK → LHR
- Typical Aircraft
- B777
- Distance
- 5,540 km
- Duration
- 6h 56m
- Cruise Altitude
- FL390
See today’s turbulence forecast
American Airlines AA100 flies the jet-stream exposed corridor from New York to London. Conditions change hour to hour - view the live forecast for your departure date.
View live forecastTurbulence on the JFK → LHR route
Jet-stream exposure on this corridor is significant. Long mid-latitude legs mean clear-air turbulence is the dominant source of bumps, typically encountered at cruise altitude. Flying eastbound, aircraft usually benefit from tailwinds near the jet core, which trims flight time - but the edges of the jet are where clear-air turbulence most often sits.
Calmest season: Late spring to early autumn (May-September). The oceanic track sees its strongest jet-stream activity in the northern winter (Nov-Mar), when winds aloft are fastest and clear-air turbulence is more frequent.
Full JFK to LHR route guideFrequently asked questions
Is AA100 usually a bumpy flight?
American Airlines AA100 operates between JFK and LHR. Whether it’s bumpy depends on the day’s weather - Turbcast pulls live NOAA aviation-grade data so you can check the actual forecast for your departure date rather than relying on averages.
What aircraft does AA100 use?
AA100 is typically operated by the B777. Aircraft swaps happen - confirm with your booking before flying.
How long is the JFK to LHR flight?
Approximately 6h 56m direct, covering 5,540 km at a typical cruise of FL390.
When does AA100 have the smoothest weather?
Historically calmest during Late spring to early autumn (May-September). Forecast accuracy improves as you get closer to departure - within 48 hours the NOAA WAFS model is at peak skill.