BA117 Turbulence ForecastBritish Airways · LHR → JFK
About flight BA117
- Airline
- British Airways (BA)
- Route
- LHR → JFK
- Typical Aircraft
- B777
- Distance
- 5,540 km
- Duration
- 6h 56m
- Cruise Altitude
- FL390
See today’s turbulence forecast
British Airways BA117 flies the jet-stream exposed corridor from London to New York. Conditions change hour to hour - view the live forecast for your departure date.
View live forecastTurbulence on the LHR → JFK 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. Westbound aircraft typically fly against the prevailing winds, adding flight time. Captains often pick altitudes that avoid the strongest headwinds, which can also mean picking cleaner-air altitudes.
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 LHR to JFK route guideFrequently asked questions
Is BA117 usually a bumpy flight?
British Airways BA117 operates between LHR and JFK. 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 BA117 use?
BA117 is typically operated by the B777. Aircraft swaps happen - confirm with your booking before flying.
How long is the LHR to JFK flight?
Approximately 6h 56m direct, covering 5,540 km at a typical cruise of FL390.
When does BA117 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.