When released, the free-flying helium-filled balloons1 may drift far from the point of release to areas and heights that may affect aircraft operations. Large clusters of free-flying helium-filled balloons may distract pilots during critical stages of flight (such as take-off or landing) and/or be ingested by aircraft engines. This may in turn endanger lives and cause harm to the property – in the air and on the ground.

How Do I Release Free-Flying Helium Balloons Safely?

The release of free-flying helium balloons is strictly prohibited during the operating hours of military airbases (Monday to Friday, 7am to 7pm; Saturday, 7am to 1pm).

Beyond these hours, free-flying helium balloons should not be released within 5km of an airport or airbase without a permit. Balloons, individually or as a cluster, should not exceed 2 metres in any linear dimension.

Do I Need To Notify CAAS To Release Free-Flying Helium Balloons?

Yes. If you are planning to release free-flying helium balloons within the area and height limits, you will need to submit a notification to CAAS.

When Do I Need A Permit To Release Free-Flying Helium Balloons?

A permit is required from CAAS when releasing free-flying helium balloons outside the area and height limits. Applications will be assessed on a case-by-case basis. It will take 7 working days to process your application, as assessment will be conducted in consultation with the Republic of Singapore Air Force (RSAF).


1A helium balloon is a pilotless object without propulsion in free flight. It stays in the air as it is filled with helium, which is lighter than air. Helium-filled balloons move freely through the air depending on the winds.