Cancellations
More mountain flights are cancelled in Nepal than almost any other scheduled sightseeing product anywhere, and it is worth understanding why before you book rather than at six in the morning on the day. The Himalaya is clear for about three hours after first light and then it is not, and no operator will fly a scenic route into cloud.
Quick answer
The decision is made at first light, not the night before, and operators reschedule rather than refund. The usual pattern is a move to the next morning at the same price. Most listings here also offer free cancellation to 24 hours. What you need is not a good forecast but a spare morning, the earliest rotation, and a listing whose terms you have read.
Why so many flights are moved
Three clear hours, and the cloud builds after them.
The Himalaya runs east to west with the Indian plains to the south. Those plains heat up fast after sunrise; the warm air rises and builds cloud against the foothills, and from the south side the peaks disappear behind it. The window between usable light and that cloud is about three hours in the good months and can be nothing at all in the monsoon.
Operators run repeat rotations inside that window, which is why an Everest flight tour booked for the first slot flies far more often than one booked for the fourth. It is also why the decision cannot be made the previous evening: the cloud that matters has not formed yet.
And they will not fly through it. A mountain flight into cloud is an hour of grey at the same price, and no operator wants those reviews.
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What to do when your flight is moved
It happens often enough to be worth knowing in advance.
This is what the spare morning is for, and it costs nothing.
Sometimes the window reopens. It is worth the question.
A second cancellation then is simply a refund and a regret.
They fly lower and up the valleys, and occasionally go when the high route does not.
Most listings here are free to cancel, so the money is not at risk. The morning is.
Cancellations through the year
Every month flies; the difference is how often the window closes.
Oct – Nov
The clearest air of the year. Flights run close to schedule and a spare morning is usually enough insurance.
Mar & Apr
Good windows through March; by late April the plains are warming and the haze builds earlier in the morning.
Dec – Feb
Often crystalline, but a winter front can close the range for two or three days at a time. Allow more than one spare morning.
Jun – Sep
Most mornings do not fly. Flights run when a window opens; plan several spare days or treat it as a bonus.
In short
A spare morning is the whole insurance policy.
Cloud against the range cancels flights, and the call is made at first light rather than the night before.
Operators reschedule rather than refund, usually to the next morning. So the thing that protects your Everest flight tour is not a forecast but a spare morning.
Book the first rotation, book early in your stay, and choose a listing with free cancellation. In the monsoon, allow several days rather than one.
Common questions
The range is clear for about three hours after first light, then cloud builds against it from the warming plains.
At first light, usually between half past five and half past six. It cannot be made the night before.
Operators reschedule first, usually to the next morning. Most listings here also offer free cancellation to 24 hours.
October and November, followed by March.
Not directly. What matters is cloud against the range 160 km away.
One in the clear months; several in the monsoon.
How to build a booking that survives the weather
This is the practical half of this page.
The range is clear for about three hours after first light, and an Everest flight tour on the first departure flies far more often than one on the fourth.
A rescheduled Everest flight tour needs a morning to move to.
Most listings here offer it to 24 hours. In this niche it is not a luxury.
So a cancellation costs you an alarm clock rather than a day.
June to September cancels most departures, and one spare day is not enough.
In short
A spare morning is the whole insurance policy.
Cloud against the range cancels flights, and the call is made at first light rather than the night before.
Operators reschedule rather than refund, usually to the next morning. What protects your Everest flight tour is not a forecast but a spare morning.
Book the first rotation, book early in your stay, and choose an Everest flight tour with free cancellation. In the monsoon, allow several mornings rather than one.
What to do with a morning the range takes away
Keep the spare morning useful, and do not double-book.
If you built the spare morning in, a cancellation costs you an alarm clock rather than a day. Kathmandu is unusually well supplied with things that work at short notice.
Before nine: Swayambhunath at dawn is better without a crowd, and Boudhanath is at its best when the morning kora is going round. Later: Patan Durbar Square, the museum, and the back lanes behind Thamel.
The one thing not to do is try to fix it by booking a second flight for the same morning with a different operator. They are all looking at the same cloud, and you will simply pay twice to be told the same thing. The better move is to take the operator’s rebooking for the following day and spend the morning you have just been handed on the city.
What the terms usually say, in plain words
Read the specific listing, but this is the shape of it.
Rescheduled to the next available rotation at no cost, or refunded in full if you cannot take it.
Free on most listings here.
Usually not refundable, which is why the free-cancellation window matters.
Not refundable anywhere. If the pickup does not arrive, phone the operator rather than giving up.
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