Depends on which type of helium balloons you have. Latex Helium will last from 9 to 12 hours. If Hi-Float is added in the balloon, floating time will increase up to 24 hours. So we suggest you only collect helium latex balloon on the day of your event. Foil / Orbz balloon / Bubble Helium balloon will last for a few days. You can collect your Foil Helium Balloon one day ahead.