Air India estimates that it has lost Rs2 billion ($36.4 million) in revenue since the start of a labour dispute with its pilots.
The pilots - originally from Indian Airlines, which merged with Air India in 2007 - went on strike on 7 May by reporting sick. They were protesting the airline's decision to exclude them from training for the Boeing 787 aircraft.
Air India has since sacked 71 pilots, saying that they defied a court order that declared the strikes illegal.
A spokesman says that the airline has not grounded any aircraft as a result of the strikes and that it is operating based on the manpower available.
The airline is operating on a "contingency schedule", which involves operating a number of its North American services via Europe.
However, up to 21 domestic and international services, including those to London, New York, Seoul, Osaka, Shanghai, Riyadh, Hong Kong, Trivandrum and Hyderabad have been cancelled because of the strikes.