... [The followers of Hazrat Mahdi (as)] WILL WALK ON WATER AND TRAVEL ABOVE THE CLOUDS...
Bihar al-Anwar, Vol. 52, p. 318; Mikyaal al-Makaarem, Vol. 1, p. 148 from Basaaer al-Darajaat.
This hadith narrated from our Prophet (saas) indicates that the followers of Hazrat Mahdi (as) will cross the bridge over the Bosphorus and travel by plane.