KLM-Royal Dutch Airways

"KLM, the Dutch subsidiary of Air France-KLM, said on Friday it had ceased flying over Iran and Iraq only after the downing of a Ukrainian plane on January 8." (JPost, "Air France-KLM: Stopped flying over Iran after downing of Ukraine plane," 1/17/2020).

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"Dutch airline KLM says it will halt flights to Tehran “as a result of the negative results and financial outlook” following the U.S. withdrawal from the Iranian nuclear accord. The airline, part of the Air France KLM group, made the announcement in a short statement on its website Saturday. KLM said its last flight will leave Amsterdam on Sept. 22 and return on Sept. 23." (July 8, 2018).

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"Dutch flag carrier KLM has resumed flights to Iran after a three-year hiatus. Carrying a Dutch trade mission, headed by Minister of Infrastructure and Environment Melanie Schultz van Haegen, on board, a KLM flight landed in Tehran’s Imam Khomeini International Airport on Sunday at 00:05 Tehran local time. “KLM has tried to strengthen its network by adding Tehran as its 14th new destination in 2016,” KLM President and Chief Executive Officer Pieter Elbers was quoted by the news portal of Iran’s Ministry of Roads and Urban Development as saying. As per the new schedule, four weekly services will be operated on Sunday, Tuesday, Thursday and Friday between Amsterdam Airport Schiphol and Tehran." (Financial Tribune, "KLM Lands in Tehran for 1st Time in 3 Years," 10/24/2016). 

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Daily flights from Tehran's Imam Khomeini Airport(IKA) to multiple counties in Europe (Company Website)

KLM and Air France "have become the largest European airline group: one group, two airlines, and three businesses." (KLM Website, "Air France KLM") 

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"Air France-KLM will suspend its Amsterdam-Tehran service starting April 2013, a spokesman for the carrier said. It currently flies to Iran four times a week." (Reuters, "Two airlines suspend Iran flights as economy weakens," 1/12/2013)

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"The company operates regular flights to and from Iran. The airline has flown the route on and off since 1948, a spokeswoman said. The company received loan guarantees from the U.S. Export-Import Bank to purchase airplanes from Boeing."  From 2000-2009, the company was the recipient of $1.4 billion US federal funds.  Their business in Iran is currently active.  (The New York Times, "Profiting from Iran, and the US," 3/6/2010)

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"Some major Western airlines were continuing to fly to Tehran, though, namely Lufthansa, Austrian Airlines, KLM and Alitalia." (The Daily Star, "Airlines stop Iran flights as currency crisis bites," 10/8/2012)