how long does helium last in balloons, The lifespan of helium in balloons can vary depending on several factors. Helium is a lighter-than-air gas, which is why it's used to make balloons float. On average, helium-filled latex balloons tend to last for about 12 to 24 hours, while foil or Mylar balloons can stay inflated for several days or even weeks. The rate of helium loss depends on factors like the quality of the balloon, the thickness of the material, and environmental conditions. Latex balloons are porous and allow helium to escape more quickly. Foil balloons, being less permeable, retain helium for a longer duration.
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