Flights between the UAE and Qatar, both major air transport hubs, have been suspended since mid-2017 when the UAE, Saudi Arabia, Bahrain and Egypt cut ties with Doha over allegations it supported extremist groups. Qatar has denied the charges.
The Arab countries this month ended the more than three-year row which had severed diplomatic and trade ties, in addition to travel links.
Etihad, owned by the government of Abu Dhabi, said daily flights to the Qatari capital would resume from Feb. 15.
Qatar Airways said in a post on Twitter it would resume flights to Dubai on Jan. 27 and to Abu Dhabi on Jan. 28.
UAE carrier Air Arabia resumed direct flights between Sharjah and Doha this month.
Direct flights between Qatar and Saudi Arabia, and Qatar and Egypt have also resumed.