We know that Elijah did return—at least twice—after Malachi’s promise.

We know that Elijah did return—at least twice—after Malachi’s promise. At Christ’s transfiguration, Elijah appeared on the mount to Peter, James, and John. At the Kirtland Temple, April 3, 1836, Elijah appeared to the Prophet and Oliver Cowdery and said, ‘The keys of this dispensation are committed into your hands.’