Season calendar
Flying in Nepal in May
8 of the flights on this platform are published as running in May. May falls in the pre-monsoon window (March – May), when visibility is good early, hazy later and cancellations are moderate. These are the seasons operators publish for their own routes, not a forecast: a Himalayan morning is decided at first light on the day, in any month of the year.
- Window
- Pre-monsoonMarch – May
- Visibility
- Good early, hazy later
- Cancellations
- Moderate
The second peak season. Haze builds through April and May as the valleys warm, so departures move earlier and the mountains show best in the first hour of light.
The flying day in May: 05:15 to 18:45
- First light
- 04:49
- Sunrise
- 05:15
- Sunset
- 18:45
- Daylight
- 13h 30m
In mid-May the sun rises over Kathmandu at about 05:15 and sets at 18:45 — 13h 30m of daylight, with usable light from around 04:49 and until about 19:10. June gives 13h 53m and December 10h 24m, for comparison. These are horizon times at sea level: Kathmandu sits in a bowl and most landing sites sit in a gorge, so the sun clears the ridge later than this and drops behind it earlier. Charters here are flown at first light because the valleys cloud over as the day warms, which makes the front of this window the part worth booking.
In season in May
8 flights operators publish for May
Routes that name this month as one of their best come first. Every row carries the operator's own wording.
- Everest Base Camp Helicopter TourIn seasonOperator season: Mar–May and Sep–Dec · 4h door to door
- Everest Base Camp Landing TourIn seasonOperator season: Apr–May and Oct–Nov · 4h 20m door to door
- Everest Region Medical EvacuationFlies year-roundOperator season: Year-round, 24/7 on-call · 1h 10m door to door
- Langtang Valley Helicopter TourIn seasonOperator season: Mar–May and Oct–Nov · 2h 30m door to door
- Lukla – Kathmandu CharterFlies year-roundOperator season: Year-round · 55m door to door
- Pathibhara Temple HelicopterIn seasonOperator season: Oct–May · 1h 30m door to door
- Upper Mustang & Lo Manthang TourIn seasonOperator season: Mar–Nov · 4h door to door
- Muktinath Darshan HelicopterFlies year-roundOperator season: Year-round, best Sep–Nov · 2h 30m door to door
Out of season in May
What the operators do not publish for May
Out of season is not the same as impossible — it is the operator saying this is not the month they would choose.
Asked about May
May, in detail
Which helicopter flights run in Nepal in May?
8 of the routes on this platform are published as in season in May: Everest Base Camp Helicopter Tour, Everest Base Camp Landing Tour, Everest Region Medical Evacuation, Langtang Valley Helicopter Tour, Lukla – Kathmandu Charter, Pathibhara Temple Helicopter, Upper Mustang & Lo Manthang Tour, Muktinath Darshan Helicopter. Those seasons are what the operators flying each route publish, not a forecast — every Himalayan departure is still decided at first light on the day.
What is the weather like for flying in Nepal in May?
May falls in the pre-monsoon window, March – May. Visibility across that window is good early, hazy later and cancellations are moderate. The second peak season. Haze builds through April and May as the valleys warm, so departures move earlier and the mountains show best in the first hour of light.
What time does the sun rise and set in Nepal in May?
In mid-May the sun rises over Kathmandu at about 05:15 and sets at 18:45 — 13h 30m of daylight, with usable light from around 04:49 and until about 19:10. June gives 13h 53m and December 10h 24m, for comparison.
Will a helicopter flight be cancelled in May?
It can be, in any month. Himalayan valleys build cloud and wind from mid-morning every day of the year, so a flight is released at first light against that morning's conditions — and in the pre-monsoon window cancellations are moderate. Nobody is charged for a flight that does not happen: operators offer the next workable slot or refund in full.
Travelling in May?
Leave a number. A dispatcher rings back with what is genuinely flyable on your dates, how many spare days to keep, and what happens to your money if the morning goes against you.