Because of its demanding geographical topography and climatic variations, domestic flights in Nepal are mostly prone to flight delays and cancellation. As the Tribhuwan International Airport in Nepal doesn’t have the technology of Instrumental Landing System yet, adverse weather conditions like heavy rain, thick fog, and strong winds may lead to flight delays and cancellation. Also, the topography of Nepal is quite uneven and the land structure is difficult. It is not safe to take flights in those adverse weather conditions. The best trekking season would be the autumn season (November- September) as the weather is dry, clear and stable. This time of year, flight delays and cancellation are rare. For other seasons, weather cannot be guaranteed. Monsoon season (June- August) is highly prone to flight delays and cancellation. Strong winds, rain and clouds make for unclear views. Also, in the winter season, flights may get cancelled due to thick fog. Therefore, if you are travelling to Nepal, it is recommended to apportion one or two spare days in case your flight gets cancelled and you are short of the scheduled time. In other cases, road transportation can be an option. However, in case of flight to Lukla, you may have to change your entire schedule if you are in short of time as there aren’t other options owning to its dramatic location.
(Note: Travel Insurance is highly recommended in case of flight cancellations. If you are short of time and are unable to catch your scheduled flight back in Kathmandu, Escape Himalaya can charter a helicopter at your service. However, the cost would have to be borne by you which can later be claimed through insurance company.)