Four or five helicopter types do essentially all of the commercial work in Nepal. Knowing which one is coming for you tells you a good deal about what is possible that day.
Airbus AS350 B3e, marketed as the H125
The workhorse of Himalayan aviation, and the aircraft on almost every flight we sell in the Everest region. Single engine, five passenger seats, and the best high-altitude performance of anything in its class.
In 2005 an AS350 B3 landed on the summit of Everest at 8,848 metres, which remains the highest helicopter landing on record. That is a stunt rather than an operation, but it tells you what the airframe can do when stripped and flown by one pilot with minimum fuel.
In service, the practical limit is different. Five seats exist, but at Gorakshep on a warm morning the aircraft may lift two passengers. The seat count is a maximum, not a promise.
Bell 407
Single engine, six passengers, roomier cabin, and popular for charter work and lower-altitude sightseeing. Its high-altitude performance does not match the AS350, so it is less common on the upper Khumbu pads.
Airbus H130
A wider-cabin relative of the AS350 with seven seats and better visibility for passengers. Used for scenic work where the landing altitude is moderate. Heavier than the B3e, which costs it performance at the top end.
Twin-engine types
Various medium twins are operated in Nepal for lowland work, VIP charter and some government contracts. Twin engines are a meaningful safety advantage over water and hostile terrain, but the weight penalty means they do not reach the high Khumbu pads with a useful load. In the mountains, single-engine machines dominate for physics rather than economics.
Why single engine, when twins sound safer
It is a reasonable question. The answer is that at five thousand metres, a twin-engine helicopter cannot usually maintain flight on one engine anyway, so the second engine buys you weight rather than redundancy. The mitigations in Himalayan operations are different: conservative weather limits, careful weight and balance, daylight-only flying, and pilots with route-specific experience.
What this means for your booking
If your route touches anything above about 4,500 metres, you are flying an AS350 B3e or H125 and the seat count is provisional. If you are flying Kathmandu to Lukla or a lowland charter, you have more options and the published seat count is realistic.
Ask us which type is assigned to your flight. We will tell you, and if it changes we will tell you that too.