How old was Eliyahu Hanavi when he went up in the chariot??
According to some opinions Eliyahu went up in the chariot in the year 2990. According to those who say that Eliyahu was Pinchos, the grandson of Aharon Hakohen, he was about 500 years old! (This is accordance with the blessing that he was given that he wouldn’t die.) There are other opinions as to who Pinchos was. See Seder Hadoros
Seder Hadoros Entries: Pinchos,ב”א תתק”צ ב”א תתקס”ב אליהו הנביא,,