New Delhi, June 14 -- At least 16 long and ultra-long haul Air India flights were diverted or forced to return to their departureairports after Iran closed its airspace following an Israeli strike in Tehran on Friday while another Air India flight from Phuket in Thailand headed to Delhi requested an emergency landing on Friday after a bomb threat was received on board.

The affected services include multiple flights from New York to Delhi, as well as from Delhi and Mumbai to London and New York, among others, according to the airline.

An Air India flight, en route to London, returned to Mumbai after three hours in the air, according to Flightradar24 data. The Mumbai-London flight remained in the air for three hours after departing from the...