Lukla's weather can be fickle, especially during the monsoon season (June to September). As a result, you must set aside a few days in case your trip is delayed or, worst-case scenario, cancelled! You have two options: either wait until the next day for your flight, which is scheduled to depart at the end of the day, or engage a helicopter service! It's critical to remember that if the weather is particularly terrible, the helicopter may not even take off!