Route turbulence forecast
Lisbon → Helsinki
Turbulence forecast for flights from Humberto Delgado Airport (Lisbon Portela Airport) (LIS) to Helsinki Vantaa Airport (HEL).
Check flights on this route
Get a segment-by-segment turbulence forecast for any scheduled flight from LIS to HEL, with live wind and pilot reports.
Live status with real-time delays and cancellations.
What to expect on this route
Northbound · Great-circle bearing 33°
Most of the route sits away from the strongest jet-stream zones, so clear-air turbulence is less common than on long east-west crossings. A large portion of the flight crosses open ocean (Mediterranean), where upper-level conditions are generally smoother than over continental terrain.
- Ocean / water segments
- Mediterranean
Seasonal turbulence pattern
Seasonal turbulence on this route is modest — most variation comes from day-to-day weather rather than strong seasonal cycles.
- Peak turbulence
- November–March (Northern Hemisphere winter)
- Typically calmest
- Late spring to early autumn (May–September)
LIS → HEL turbulence FAQ
Is the Lisbon to Helsinki flight usually bumpy?
Most of the 3,364 km route sits in the subpolar band with low jet-stream exposure. Historically that means most flights cruise in smooth air, with turbulence limited to short sectors near weather systems.
When is the best time to fly LIS to HEL for a smooth flight?
Statistically, Late spring to early autumn (May–September) sees the calmest conditions for this corridor. Within any season, morning departures see less convective (thunderstorm-driven) turbulence than afternoon flights.
How long is the flight from LIS to HEL?
Block time is usually around 4h 25m direct, cruising at approximately FL370 (37,000 ft). Actual duration varies with winds — tailwinds can shave 15–30 minutes, headwinds can add 30+ minutes on this northbound sector.
How accurate is Turbcast's forecast for this route?
We use live NOAA Aviation Weather Center pilot reports (PIREPs), SIGMETs and AIRMETs, layered with physics-based Ellrod and Richardson-number calculations from Open-Meteo pressure-level wind and temperature data. If a source is unavailable for a waypoint we show an em dash rather than invent a value.
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