India, Nov. 14 -- Air travel across the United States remained disrupted on Saturday after a telecommunications failure at regional air traffic control centres forced the Federal Aviation Administration (FAA) to impose a nationwide ground stop, affecting thousands of flights.

The FAA lifted the restriction on Friday evening, allowing departures to resume after more than four hours. However, airlines warned that operations would take time to return to normal as aircraft and crew members remained out of position.

At least 600 flights were diverted during the disruption, according to aviation analytics firm Cirium. Thousands of other flights were delayed or cancelled, leaving passengers stranded at airports across the country.

US Transpor...