Jesus will be returning only one more time—at the 7th trumpet—the white horse of Revelation 19.
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war. His eyes were as a flame of fire, and on his head were many crowns; and he had a name written, that no man knew, but he himself. And he was clothed with a vesture dipped in blood: and his name is called The Word of God. And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.
- Revelation 19:11-14 (KJV)
The first white horse of Revelation 6 is the fake Christ who comes at the sixth trumpet. He comes before the true Christ. His one intent is to deceive the world into worshiping him. Jesus tells us not to be deceived!
Then if any man shall say unto you, Lo, here is Christ, or there; believe it not. For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
- Matthew 24:23-24 (KJV)