How Long Do Balloons Last? (Latex vs Foil, and How to Make Them Last Longer)

How Long Do Balloons Last? (Latex vs Foil, and How to Make Them Last Longer)

By the Jofete Team · Last updated: September 24, 2026 · 5 min read

How long do latex balloons last?

Latex balloons last 8–12 hours when filled with helium (up to 24 hours in cool, still conditions), and 2–4 weeks when filled with air. Helium escapes through the latex wall within a day, which is why helium balloons sink overnight while air-filled balloons in a garland stay put for weeks.

• Helium, 11-inch latex: 8–12 hours
• Helium, 5-inch latex: 5–8 hours
• Air-filled latex: 2–4 weeks indoors

How long do foil balloons last?

Foil (mylar) balloons last 3–7 days with helium and often a full two weeks indoors. The metallic coating traps helium far better than latex, so foil is the better choice for number balloons, letters and any decoration that must still look right the morning after.

How long do balloons last with Hi-Float?

Hi-Float roughly triples latex float time, taking an 11-inch balloon from 8–12 hours to 24–48 hours. It works by coating the inside of the balloon with a gel that blocks the helium from escaping. A single bottle treats around 50 eleven-inch balloons.

Does air or helium change how long balloons last?

Yes — air lasts far longer than helium. Air-filled latex balloons hold their shape for 2–4 weeks because air molecules are larger and do not pass through the latex. Helium atoms are small enough to leak out in hours, so helium is only worth it when the balloon actually needs to float.

How do I make balloons last longer?

Keep them cool, out of sunlight and away from rough surfaces. Heat and UV are the two biggest causes of early popping and deflating.

1. Inflate on the day of the event. Helium balloons inflated the night before will be half-deflated by the party.
2. Keep them out of direct sun. Sunlight and heat above 27°C (80°F) can halve float time and make latex brittle.
3. Use Hi-Float for helium latex. It adds 24–36 hours of float time for a few cents per balloon.
4. Inflate to the recommended size. Over-inflating stretches the latex thin and shortens its life.
5. Avoid rough walls and ceilings. Friction is the number one cause of popped balloons at an event.

How long before the party should I inflate balloons?

Inflate helium balloons 2–4 hours before the party starts, and air-filled balloons or garlands 1–2 days before. Helium latex peaks in the first few hours and then sinks, so inflating the morning of the event is the safest plan.

Frequently asked questions

Do balloons last overnight?

Foil balloons do — they float for 3–5 days. Helium-filled latex balloons usually will not: they lose enough helium in 8–12 hours to sink to the floor by morning. If your event runs across two days, use foil balloons or re-inflate the latex ones on day two.

Why do my balloons deflate so fast?

The three usual causes are heat, over-inflation and low-quality latex. A balloon left in a hot car or in direct sun can deflate in 3–4 hours instead of 8–12. Storing balloons in a cool, shaded room and inflating them to size fixes most of the problem.

How long do balloons last outside?

Outdoor balloons last roughly half as long as indoor ones — about 4–6 hours for helium latex. Sun, wind and temperature swings all speed up deflation and popping, so for outdoor events use foil balloons or plan to inflate on site.

Shop balloons: browse our party supplies for latex and foil balloons, balloon garland kits and pumps, or match your palette with party colours.

Related: see helium vs air balloons to choose the right gas.

Related: compare latex, foil and bobo balloons.