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Agung and Batur Helicopter Flights: How Ash Advisories Change Routes

Volcano alerts and ash advisories decide where a helicopter can fly near Mount Agung (3,031 m) and Mount Batur (1,717 m). When an alert level rises or ash is reported, the operator and air traffic control can close a route, move your flight to a clear area such as Ubud or the Bukit, or stop flying altogether. A Mount Batur flight is $1,150 for the whole helicopter, and the clearest hours are 07:00 to 10:00. Below: what the alerts mean, how routes change and what we do when a level moves.

SafetyUpdated 2026-10-115 min read

Mount Batur caldera and lake at sunrise from a helicopter in Bali

In this guide

Agung, Batur and Rinjani: Three Different Flight Situations
How Volcano Alerts and Ash Advisories Work
What the 2017–2019 Agung Eruptions Taught Travellers
How Alert Levels Change Your Route
Why 07:00 to 10:00 Is the Volcano Window
What We Do When an Alert Level Changes

3,031 mMount Agung, Bali's highest and holiest

1,717 mMount Batur, inside the Batur caldera

3,726 mMount Rinjani on Lombok

2017–2019Agung eruptions closed Bali's airport several times

Three volcanoes

Agung, Batur and Rinjani: Three Different Flight Situations

All three are active volcanoes, and each one affects a helicopter differently. Times are airborne minutes from the Bukit pad area.

Volcano	Height and place	What it means for a flight
Mount Batur	1,717 m, inside the Batur caldera beside Lake Batur at Kintamani	The usual volcano flight, 20–30 min from the Bukit; the Batur tour starts at $1,150. Best before the cloud builds.
Mount Agung	3,031 m, Bali's highest and holiest, in the east	Reached in 20–30 min. Seen from a distance on most routes, and the most sensitive to alerts after the 2017–2019 eruptions.
Mount Rinjani	3,726 m on Lombok, with the Segara Anak crater lake	40–60 min from the Bukit, by quote; see Rinjani from Bali. Its summit is often in cloud by late morning.

No landing on a volcano slope, in a crater or in protected areas. Landings near Kintamani use approved sites only; see Kintamani pick-up.

How it works

How Volcano Alerts and Ash Advisories Work

Indonesia's volcanology agency, PVMBG, sets an alert level for each volcano from I (Normal) to IV (Awas, or Danger), with Waspada (II) and Siaga (III) in between. When the level goes up, officials widen the exclusion zone around the crater. The levels belong to the agency and change with the volcano's activity, so check the official source rather than a travel blog, including this one.

Aviation uses its own tools. A regional Volcanic Ash Advisory Centre issues ash advisories, and a colour code for aviation runs from green to red. Pilots and air traffic control read these before every flight in the area. They are designed to keep aircraft out of ash, because volcanic ash is abrasive and can damage engines, windscreens and rotor blades, and it cannot always be seen in haze or cloud.

That is why the two decisions are separate. The alert level tells the operator how close it may fly to the crater. The ash advisory tells air traffic control which airspace to close. A flight that is fine under one can still be stopped by the other, and the operator and air traffic control have the final word, not us.

2017–2019

What the 2017–2019 Agung Eruptions Taught Travellers

Mount Agung's activity between 2017 and 2019 closed Bali's airport several times, left visitors stuck and put the volcano in the news for travellers worldwide. It remains the benchmark for what an alert can do. Airlines, harbours and helicopter operators all follow the same signals, so a closed airport and a closed helicopter route often come together.

The practical lesson is flexibility. If you build a volcano flight into a tight itinerary, with an international departure the same evening, you carry the risk. Keep a spare day before you leave Bali, check your travel insurance for volcano disruption, and tell us if your plan has no buffer. Our questions to ask an operator guide covers the other side: what the operator should tell you about its limits.

What changes

How Alert Levels Change Your Route

This is what we usually expect, not a promise. The operator and air traffic control decide on the day.

Situation	What usually happens to the flight	What we offer you
Normal (I), clear morning	The planned route runs at the operator's usual distance from the crater	The flight as booked
Alert (II) around Agung or Batur	The route may keep a wider distance from the crater, and the pilot may skip the closest pass	Same price, a slightly different route, agreed before take-off
Standby (III), Danger (IV) or ash reported	No flying into the zone; air traffic control may close the airspace or the airport	A clear route such as the Ubud flight, a new date, or a refund of the part not flown
Summit in cloud	The volcano is hidden, so the view is poor	An earlier slot the next day, or a coastal flight instead

Nothing here is a safety guarantee. The pilot can cancel or change any flight, and we do not argue with the decision.

Morning cloud

Why 07:00 to 10:00 Is the Volcano Window

Mountain cloud builds from late morning, especially in the wet season from November to March, and the high summits cloud over first. Agung at 3,031 m and Rinjani at 3,726 m are the first to disappear. Batur at 1,717 m holds out longer, but cloud can fill the caldera by the afternoon.

A volcano flight at 07:30 gives you a clear crater lake, clean slopes and the best air of the day. In the dry season from April to October the window is wider; in the wet season it can close by 10:00. Our best time for a helicopter flight guide lists the months. If you want the whole island, the grand circle tour starts in the same early hours.

What we do

What We Do When an Alert Level Changes

Check the official sources the evening before and at dawn

That means the alert level and any ash advisory for the area your route covers.

Ask the operator and air traffic control what is allowed

They tell us which routes are open, how close the pilot may go and whether any airspace is closed. We pass their answer on without softening it.

Message you with options, not a surprise

A different route, an earlier or later slot, another date, or a refund of the part not flown.

Move the flight if you choose

If your dates are fixed, say so at the start and we will plan a back-up route in a clear area.

Stand by the pilot's decision

If the pilot says no, the flight does not go. We reschedule or refund the part not flown.

FAQ

Frequently asked questions

Can a helicopter fly near Mount Agung?

Usually at a distance, on routes the operator and air traffic control allow. The closest approach changes with the volcano's alert level, and the area can close entirely at a high level or when ash is reported. The flight to Agung is 20–30 min from the Bukit.

What happens if a volcano alert cancels my flight?

We offer a different route in a clear area, a new date or a refund of the part not flown. The pilot's decision stands, and we tell you what the operator tells us.

Does volcanic ash really damage a helicopter?

Yes. Ash is abrasive and can wear down engines, windscreens and rotor blades, which is why aircraft avoid it. Pilots read ash advisories before flying in the area.

Is a Mount Batur helicopter flight allowed when the level is raised?

It depends on the level and on the advisory that day. The operator and air traffic control decide whether a route is open and how close the aircraft may go. The Batur tour can be swapped for another route if it is not.

When is the best time to see the volcanoes clearly?

From 07:00 to 10:00, before cloud builds. The window is longer in the dry season, April to October, and shorter in the wet season.

Can the helicopter land at the crater or on the slopes?

No. Landing on a volcano's slopes or in a crater is not offered, and we land only at approved sites. For the Kintamani area we confirm a site before you pay; see Kintamani helicopter landing.

Fly the Volcanoes Early: Send Your Dates and a Spare Day

Tell us your dates, your guests and how flexible you are. We check the alert level and the forecast, then reply with a route, an early slot and a fixed price, plus a back-up if the volcano is closed.

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