How Long Do Helium Balloons Last and How to Make Them Last Longer

If you're planning a party, celebration or event, one of the most common questions is: how long do helium balloons last? The answer depends on the type of balloon, where it's kept, and whether it's treated to stay afloat longer.

In general, helium balloons last from 8 hours to several days, depending on the material and conditions.

How Long Helium Balloons Last by Type

Latex Balloons

These are the standard party balloons you see in most high street shops.

• Without treatment: Last around 8 to 12 hours

• With Hi-Float (a special gel coating): Can last up to 2–3 days

Because latex is porous, helium escapes more quickly through the material.

Foil (Mylar) Balloons

These shiny balloons hold helium much longer due to their non-porous surface.

• Average float time: 3 to 5 days

• In perfect indoor conditions, some may last a week or more before they start deflating

Foil balloons are ideal for displays you need to last longer, like birthdays or weddings.

What Affects Helium Balloon Float Time?

1. Temperature

Helium expands in heat and contracts in the cold. In hot weather, balloons can burst, while in cold conditions, they may look deflated — though they usually puff up again indoors.

2. Size of Balloon

Larger balloons hold more helium and therefore float for longer. A 24-inch balloon will last much longer than a standard 11-inch one.

3. Quality of the Balloon

Cheap balloons tend to be thinner and more porous. Premium-grade balloons (especially professional helium-quality latex) hold helium better.

4. Sealing Method

Properly tied or heat-sealed balloons leak less helium. Poorly tied balloons will lose helium quickly.

Can You Make Helium Balloons Last Longer?

Yes — especially with latex balloons.

• Use Hi-Float treatment inside latex balloons before inflating. It coats the interior to slow down helium escape.

• Keep balloons indoors and at a stable temperature.

• Avoid direct sunlight, radiators, or fans — they can speed up helium loss or cause bursts.

• Use a balloon net or frame to reduce them bumping around or rubbing against surfaces.

When Should You Inflate Balloons for an Event?

• Latex balloons (untreated): Inflate no more than 6–8 hours before the event.

• Latex balloons with Hi-Float: You can inflate them a day in advance.

• Foil balloons: Inflate them 1 to 2 days before your event if needed.

For morning events, consider inflating balloons late the night before, especially if using Hi-Float or foil.

Final Thought

Helium balloons can float anywhere from 8 hours to 5 days, depending on the balloon type and conditions. Latex balloons without treatment are short-lived, while foil balloons last much longer. If you need balloons to stay afloat overnight or for a weekend, choose foil or use Hi-Float with latex — and always store them somewhere cool, calm and out of direct sunlight.