Aeroflot

"Aeroflot will resume scheduled flights to Iran from April 2, the Russian air carrier’s press service said on Monday," after halting flights to Iran in mid March. (Tass, "Aeroflot to resume flights to Iran from April 2 — company," 3/21/22) (https://ifpnews.com/russias-aeroflot-suspending-flights-to-tehran-as-of-tuesday/)

"A flight by Russian airline Aeroflot carrying Russian national Yulia Yuzik, who has been released from detention in Iran, landed in the Sheremetyevo International Airport in Moscow early on Thursday, the airport's online timetable showed." (Sputnik news, "Flight carrying Russian national Yuzik Released by Iran Lands in Moscow," 10/10/2019).  (https://sputniknews.com/russia/201910101077004357-flight-carrying-russian-national-yuzik-released-by-iran-lands-in-moscow---online-timetable/)

Aeroflot Tehran has an office located at Imam Khomeini International Airport in Tehran. (https://airlines-airports.com/aeroflot-airline-airport-office-in-tehran-iran/)

"Russia’s Aeroflot, Kuwait Airways, China Southern Airlines, Oman Air and Oman’s SalamAir are scheduled to operate flights to Tehran over the weekend, according to their websites." (Reuters, "Factbox: Flights to Tehran canceled after Canada says Iranian missile brought down Ukraine jet," 1/10/2020). (https://www.reuters.com/article/us-iraq-security-airlines-safety-factbox/factbox-flights-to-tehran-canceled-after-canada-says-iranian-missile-brought-down-ukraine-jet-idUSKBN1Z91DM)

Aeroflot lists Pardisan Aero Services as its central office in Tehran, Iran. (https://m.aeroflot.ru/it-en/another_region/517)

Flights run between Tehran's Imam Khomeini Airport (IKA) and multiple cities in Europe.