United Airlines has suspended its flights from Newark to Mumbai. (File)
The United States Federal Aviation Administration on Thursday issued an order for emergency or prohibition.
The order New York's Newark airport and Mumbai, United Kingdom, flying through Iranian airspace, following a high-altitude US surveillance drone.
United States Iran airspace after a "thorough safety and security review".
A United States spokesman said customers flying from Mumbai to Newark would be booking alternative flights back to the United States.
"We continue to explore all our options and stay in." "The spokesman said."
On Thursday, two other carriers, American Airlines and Delta Air Lines, said they did not fly over Iran. Japanese Airlines Japan Airlines Co Ltd and ANA Holdings Inc.
The Global Hawk aircraft, which can fly up to 60,000ft (1
FAA said that the closest civil aircraft were operating within 45 nautical miles of a US Global Hawk drone when it was shot down at Iranian surface-to-air missile.
"There were numerous civil aviation aircraft operating in the area at the time of the intercept," FAA said.
The agency said it
In July 2014, Malaysia Airlines Flight MH17 killing all 298 on board, prompting carriers to take more steps to uncover threats to their planes.
The US prohibition does not apply to airlines from other countries, but OPSGROUP, which
"Since MH17, all countries rely on the US, the UK, France and Germany to highlight airspace risk," OPSGROUP said.
Flightradar24 showed Qatar Airways and Etihad Airways at 0300 GMT on Friday. Qatar and Etihad