Following the shooting of a U.S. drone by Iran on June 20, 2019, several airlines modified their routes or suspended flights that crossed the airspace above the Strait of Hormuz and the Gulf of Oman.

Hours after the incident, the U.S. Federal Aviation Administration (FAA) issued a ban on civil aviation for U.S. operators to use the overwater area of the Tehran Flight Information Region “due to heightened military activities and increased political tensions”. According to the FAA, the nearest civil aircraft was operating within 45 nm (83 km) of the drone when it was shot down.

At the time, United Airlines had already suspended flights between Newark airport and the Indian city of Mumbai, as they pass through Iranian airspace.

While for now the FAA’s decision only applies to U.S. operators, other airlines have also decided to modify courses of their flights or cancel them altogether. KLM, Delta Air Lines, British Airways, Lufthansa, Qantas, Japan Airlines, Singapore Airlines, and Malaysia Airlines have all reportedly modified their operations, either canceling flights or rerouting their aircraft.

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In a letter to the Secretary-General of the United Nations, Iran’s ambassador Majid Takht Ravanchi claimed that the US drone had entered the country's airspace "despite several warnings repeated by radio".

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The Iranian Revolutionary Guards Corps (IRCG) claimed to have shot down a U.S. drone near the Strait of Hormuz, southern Iran. The information was confirmed by a U.S. official.
 

Both parties are still disputing the location of the drone at the moment of the incident.

CENTCOM, the U.S. military command for Central Asia and the Middle East, published a map of the alleged time and location of the aircraft when it was destroyed, which it claims “had not violated Iranian airspace at any time”.

Meanwhile, Deputy Foreign Minister Abbas Araghchi told the Swiss ambassador to Tehran, acting as a U.S. envoy, that Iran found debris of the drone within its territorial waters. Unidentified parts were later shown on the state television.

Unlike what was announced before, it seems that the drone was, in fact, an RQ-4 Global Hawk, as Iran had claimed. The US Air Force, currently operating the latest version (RQ-4B) had sold its older drones to the US Navy, which operates in a Broad Area Maritime Surveillance (BASM-D) configuration. The Islamic Revolutionary Guard Corps (IRGC) used one of its indigenous Khordad 3 missile systems to bring it down.