Problem: Luke says Jesus ascended from Bethany (Luke 24:50), but Acts 1:9–11 affirms that He ascended from the Mt. of Olives near Jerusalem.
Solution: Bethany was on the eastern slope of the Mt. of Olives, which is just east of Jerusalem. Luke, who wrote both passages (cf. Acts 1:1), saw no contradiction in referring to both places as the general location of Christ’s ascension. Jesus may have begun His ascension from the mount, passing to the east over Bethany as He disappeared from their sight.
“And he led them out as far as to Bethany, and he lifted up his hands, and blessed them. And it came to pass, while he blessed them, he was parted from them, and carried up into heaven. (Luke 24:50-51)”