Release of free-flying helium balloons
Learn about the safety rules for releasing free-flying helium balloons in Singapore, and when a permit is required.
Last updated 9 May 2026
Free-flying helium balloons can drift far from where they are released.
They may rise to heights that affect aircraft operations. Large clusters can distract pilots during take-off or landing, or be ingested by aircraft engines.
This can endanger lives and damage property in the air and on the ground.
What are free-flying helium balloons
They are unpowered objects filled with helium that stay aloft because helium is lighter than air. They drift with the wind.
What are the rules and restrictions
Hours when balloon releases are prohibited
The release of free-flying helium balloons is strictly prohibited during military airbase operating hours:
Monday to Friday: 7am – 7pm
Saturday: 7am – 1pm
Balloon size limits
Balloons, whether single or in a cluster, must not exceed 2m in any dimension.
Permit for release of free-flying helium balloons
The release of free-flying helium balloons may require a permit if they pose risks to aviation safety.
Use SkySAFE to check where you can conduct your activity and apply for a permit.
When to submit an application
Submit your application on SkySAFE with complete information at least 7 working days (excludes Sat, Sun, and public holidays) before your proposed activity begins.
Contact information
Air Navigation Services Policy Division
CAAS_ANSP@caas.gov.sg