Is the Gas Helium Flammable? Now, my stupid friends keep telling me that helium isn't flammable, but I bet my life is isn't, and I need you all to back me up. BEFORE you say "Well it is because the Hindenburg," STOP! For a FACT, the Hindenburg was full of hydrogen. They used hydrogen because: - There is more on Earth,...; OPPS!!!!!!... please READ THIS! I meant to say helium isn't flammable but my friends said it is. Sorry i confused you all.