The answer
There are no scriptural passages that mention praying to angels. However, there are several biblical references that reveal angels' intercessions and other interactions with angels: the angel of the Passover; Lot and the angels that took him out of Sodom; Elisha the prophet with a host of angels; Ezra with Archangel Suriel; Tobit and his son Tobias with Archangel Raphael; Isaiah and the angel that put the coal on his lips; Daniel the prophet and Archangel Michael; Zacharias the priest and St. Mary Theotokos with Archangel Gabriel; the shepherds at the Nativity of the Lord Jesus Christ with a host of angels; the Mary's with the angels at the resurrection; the apostles and the angels at the ascension; St. Peter and the angel that released him from prison; St. Paul and St. Silas and an angel while in prison; and angels mentioned in the Holy Book of Revelation.This is an additional resource regarding the power and importance of prayers and intercessions:
http://www.stmarkboston.org/our-fatih/intercession-by-pope-shenouda-iii/
Answered by His Eminence Metropolitan Youssef (opens in a new tab)