DL129 turbulence forecast
Delta Air Lines · Barcelona (BCN) to New York (JFK)
Next departure at its usual time · Sat 3 Oct, 10:55 Barcelona time
This date's schedule isn't confirmed yet. This is the air DL129 flies through if it leaves at its usual time.
Mostly smooth. About 80 minutes of light bumps on descent. Barely moves your drink.
- Bumpiest stretch
- Light
- Flight time
- 8h 51m
- Distance
- 6,157 km
- Cruise altitude
- 37,000 ft
- Aircraft
- Boeing 767
Bumpiness along the flight
Takeoff on the left, landing on the right. The higher the line, the bumpier the air the forecast expects at that moment.
Where, and why
The flight split into stretches: how bumpy each is forecast to be, and what causes it.
Cruise0m – 5h 51mSmooth
Nothing significant forecast here.
At cruise the air is thin and cold, and most of it is calm. The bumps up here come from the jet stream, a river of fast wind whose edges stir the air, or from waves set off by mountains far below. This forecast maps exactly where those edges sit.
Cruise5h 51m – 7h 9mLight
Jet-stream wind shear
Where fast air slides over slower air, usually at the edge of the jet stream, the boundary ripples like a flag. It is the most common kind of turbulence and it never comes as a surprise: it is on the crew's charts, and they slow to a set turbulence speed and let the aircraft ride it out.
At cruise the air is thin and cold, and most of it is calm. The bumps up here come from the jet stream, a river of fast wind whose edges stir the air, or from waves set off by mountains far below. This forecast maps exactly where those edges sit.
Cruise7h 10m – 8h 51mSmooth
Nothing significant forecast here.
At cruise the air is thin and cold, and most of it is calm. The bumps up here come from the jet stream, a river of fast wind whose edges stir the air, or from waves set off by mountains far below. This forecast maps exactly where those edges sit.
This forecast changes. FlyBud tells you when.
A new weather model run lands every few hours. Add DL129 in FlyBud and you get the full turbulence map along your route, a push when the forecast for your flight changes, live tracking and your flight on the lock screen.
Flight status
The latest DL129 flight on our records, as the airline last reported it.
Last update 36 h ago
Gate changes, delays and the baggage belt, pushed to your phone as they happen.
The aircraft
What DL129 is flown with, and how it handles bumpy air.
Boeing 767-400
- Type code
- B764
- Seats on this flight
- 233
- First flew
- 1981
- In service since
- 1982
- Economy seating
- 2-3-2
- Engines
- 2
- Range
- 11,070 km
- Cabin pressure equal to
- 8,000 ft
Bigger and heavier aircraft are moved less by the same patch of air, but every airliner is built for far more than turbulence produces.
The airline
Delta Air Lines
- Flying since
- 1925
- Alliance
- SkyTeam
- Hubs
- Atlanta, Detroit, Minneapolis–St Paul
- Country
- United States
The route
Barcelona (BCN) → New York (JFK)
- Distance
- 6,157 km
- Flight time
- 8h 51m
- Usual departure
- 10:55 local
- Usual arrival
- 13:46 local
Recent DL129 flights
The forecast each flight carried, and how it ran.
| Date | Aircraft | Forecast | How it ran |
|---|---|---|---|
| Tue 29 Sep | 767 | Light | 92 min late |
What each level feels like
- Smooth
- Calm air. Nothing to notice beyond the hum of the engines.
- Light
- Gentle ripples and the odd dip. Drinks stay put, and walking to the toilet is fine.
- Moderate
- Distinct bumps. A drink might slosh and the belt sign comes on. Uncomfortable, and the aircraft is in full control throughout.
- Severe
- Strong jolts, and loose items can move. Rare, and the reason the belt sign exists: crews slow down and change altitude to get out of it.
How this forecast is made
The planned route is sampled from gate to gate at the altitude the aircraft flies, through a global weather model, and corrected with turbulence reports radioed in by pilots in the last few hours. Each new model run replaces the forecast.
Planned route · timing and conditions may change.
Why the bumps are only bumps
Built for it.
Airliners are tested to loads far beyond anything turbulence produces; the wing flexing you can see is by design.
Seen in advance.
Your crew flies with forecasts like this one, live reports from other pilots and their own weather radar, and they change altitude to stay out of the bumpy air.
The belt is the whole story.
Turbulence injuries almost always involve someone standing or unbuckled. Seated with the belt on, it is a bumpy road and nothing more.
Questions about DL129
Will DL129 be bumpy?
For the flight on Sat 3 Oct: Mostly smooth. About 80 minutes of light bumps on descent. Barely moves your drink. The forecast is replaced with every new weather model run, so check back closer to departure.
What plane flies DL129?
Recently DL129 has been flown with: Boeing 767. Airlines can swap the aircraft until shortly before departure.
How long is DL129?
About 8h 51m gate to gate from Barcelona to New York, a distance of about 6,157 km.
What time does DL129 leave?
DL129 usually departs Barcelona at 10:55 local time and arrives in New York at 13:46 local time. Times change; the app tracks the live schedule.
Is turbulence dangerous on DL129?
Turbulence is uncomfortable, not dangerous to the aircraft. Airliners are certified for loads far beyond anything turbulence produces, and crews plan around the bumpy patches with the same kind of forecast as this one. Injuries are almost always to people who were standing or unbuckled, so keep your seatbelt fastened whenever you're seated.
How accurate is this turbulence forecast?
It is a forecast, so it is best within a day or so of departure and improves with every model run. The bumpy patches it finds are usually in the right place, but their timing can shift by a few minutes and the crew may change altitude to avoid them, so the ride you get is often smoother than the forecast.
Fly DL129 knowing what's ahead
The turbulence forecast for your exact flight, live tracking, delay alerts and arrival weather. Built for people who'd rather know.