Air travel across India was in turmoil for a fourth day on Friday after IndiGo cancelled more than 1,000 flights, including all departures from New Delhi, prompting the government to announce special relief measures for the country's largest airline.

In a bid to improve air travel safety, Indian authorities have introduced new stricter regulations limiting pilot flying times and placing tighter restrictions on their operation of nighttime flights.

But IndiGo admitted it failed to plan properly ahead of a November 1 deadline for the measures' introduction. With air travel now approaching its December peak, that has forced widespread flight cancellations this week that have stranded thousands of travelers.

IndiGo CEO Pieter Elbers apologized to the airline's customers in his first public

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