"United Arab Emirates’ flydubai continues to operate flights to Iran, including to Tehran, a spokeswoman said." (Reuters, "Factbox: Flights to Tehran canceled after Canada says Iranian missile brought down Ukraine jet," 1/10/2020).
FlyDubai ended its Dubai - Bandar Abbas and Dubai-Tehran Imam Khomeini route on January 31, 2018. It continues to operate 3 weekly flights from Dubai - Mershad. (February 12, 2018)
"The opening of a new air corridor between two neighboring countries rarely captures the attention of the world's media. But when Emirates Airline launched flights from Dubai to Mashhad on 1 September, everyone knew the UAE flag-carrier was thinking about much more than its own bilateral links with Iran. Air traffic between the two countries has been rising since long before July's landmark nuclear agreement... FlyDubai has followed suit by expanding its Iranian network from two to nine destinations this year, while Etihad has more than doubled frequencies on its Abu Dhabi-Tehran route. Much the same script is being followed across the water in Doha, where flag-carrier Qatar Airways has grown seat capacity on its three Iranian routes by 30% since last summer." (Al Arabiya, "Iran plays catch-up in Gulf aviation boom," 9/13/15)
“Dubai-based airline flydubai today announced the launch of flights to Mashhad and Tehran, the carrier’s first two destinations in Iran, starting from August 10 and 11, respectively. flydubai will serve Iran with four flights a week, providing passengers with greater convenience when travelling between the UAE and Iran. With a network of 77 destinations the carrier is looking to expand its network in the market as it continues to strengthen trade and travel links from Dubai to the region.” (Khaleej, "Flydubai launches flights to Iran starting next week," 8/3/14)