Cloud
Every scenic flight on this island depends on the same thing, and it is not rain. It is whether the inside of the cirques is open. Here is what actually postpones a Reunion helicopter flight, what happens to your money when it does, and the one booking decision that protects the whole trip.
Quick answer
A Reunion helicopter flight is postponed by cloud inside the cirques rather than by rain on the coast. Operators move flights rather than fly a circuit you would not enjoy, and the helicopter listings on this page are free to cancel up to 24 hours before. The protection that actually works is booking the flight for the first days of your trip and taking the first slot of the morning.
What actually cancels a flight
Cloud in the bowls, wind on the ridges, a wet front, or a restricted zone at the volcano.
Cloud inside the cirques. The most common reason by a distance. Air pushed up the ramparts condenses and fills the bowls from the inside. A Reunion helicopter flight into a filled cirque shows you the top of a cloud, so the operator moves you rather than sells you that.
Wind over the ridges. Less common, and more absolute. Turbulence over a rampart is a comfort and safety question rather than a visibility one, and a strong day closes the interior regardless of how clear it looks.
Heavy rain on the route. In the wet season a front can sit over the east of the island for a day at a time. This is when flights are postponed for longer than a morning.
An eruption restriction. When Piton de la Fournaise is active a restricted zone is set around it. Flights continue outside it, on an adjusted circuit — this changes the route rather than cancelling the day.
What happens to your money
None of this is unusual, and all of it is easier if you book early in the trip.
Shown on the helicopter listings on this page. Read the line on the listing you pick; it is the standard, not a promise we can make for every operator.
The usual outcome is a new slot, often the same week and sometimes the same day. Take it if you can — the refund ends the attempt.
If they call it off, you are rebooked or refunded. If you call it off, the cancellation terms on the listing apply.
Some listings allow it, which makes holding an early slot cheap.
If a restricted zone or cloud changes the circuit, the flight still runs at the price you paid.
This is the part travellers worry about and should not. A closed cirque is a postponed Reunion helicopter flight on this island, every time.
The single decision that protects a Reunion helicopter flight is not insurance. It is putting the flight in the first two or three days of your trip and taking the first slot of the morning.
When to fly→Reading the sky yourself
Watch the summit line at dawn. The coast tells you nothing about the cirques.
A clear coast means nothing. The lagoon at Saint-Gilles can be in full sun while Mafate is a white bowl. The two climates are twenty kilometres and two thousand metres apart, and they behave independently.
A grey coast means little either. Low cloud on the west coast in the early morning often burns off while the interior stays open for another hour or two.
What is worth watching is the summit line. If Piton des Neiges and the ramparts above Cilaos are visible from the coast road at dawn, the cirques are usually open and your Reunion helicopter flight will go. If the high ground has been hidden since first light, the odds are worse.
And the season sets the baseline. In the dry months the pattern is: clear early, closing towards midday. In the wet months it is: sometimes clear early, closing sooner, and occasionally shut for a day.
Book direct
Free cancellation up to 24 hours before is shown on every Reunion helicopter flight here. Book the first slot and put it early in your trip.
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Cyclone season
A few lost days, wetter air, and the same three rules that work all year.
Between November and April the south-west Indian Ocean has a cyclone season, and it is worth being plain about what that does and does not mean for a Reunion helicopter flight.
What it does mean. A few days each season when nothing flies at all, and a general pattern of wetter air and earlier cloud. A Reunion helicopter flight booked in February has a lower chance of running on its original slot than the same flight in July.
What it does not mean. That the season is unbookable. Most days in the wet months are ordinary tropical days: clear early, closing towards midday. A Reunion helicopter flight on a January morning at seven is a perfectly reasonable plan, and the cirques are at their greenest.
What to do about it. The same thing that works all year, only more so. Book the first slot, put the flight in the first days of your trip, and take a rebooking over a refund. Systems are tracked and named days in advance, so a genuine cyclone is never a surprise to the operator or to you.
Common questions
Cloud inside the cirques, most often. Wind over the ridges, heavy rain on the route and an eruption restriction at the volcano are the other three, and the last one usually changes the circuit rather than cancelling it.
The helicopter listings on this page are free to cancel up to 24 hours before. If the operator calls the flight off you are rebooked or refunded; take the rebooking if you can.
Rain on the coast is not the issue. What decides it is whether the inside of the cirques is clear enough to be worth flying into.
A Reunion helicopter flight is postponed more often in the wet season, December to March, and least often between May and October. Morning slots are moved least of all.
Not reliably. The coast and the interior are different climates. If the summit line is visible at dawn the odds are good.
A restricted zone is set and operators fly an adjusted circuit around it. The flight usually runs; the route changes.
Go deeper
From $196 to $422, and what a minute in the air is worth.
The verdictOne recommendation for each town, and why.
No roadFourteen kilometres by seven, and not one road into it.
The chasmWaterfalls in a hole in the forest, reached no other way.
The volcanoTwo thousand six hundred metres of active crater.
The cirquesMafate, Cilaos and Salazie in thirty-six minutes.
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