"Four Air India domestic flights were delayed due to the ongoing strike," Air India spokesperson said.

There was an average 25 to 30 minutes delay in the flights, the spokesperson said.

However, Mumbai International Airport Limited (MIAL) spokesperson said that flight operations at the Mumbai airport were by and large normal.

Jet Airways had also made all arrangements at its end, so that it was not affected due to the strike, its Chief Executive Officer (CEO), Wolfgang Prock-Schuaer had said in a statement on Tuesday.

Vijay Mallya-owned private airline, Kingfisher Airlines, had said that it was monitoring the situation closely but was fully prepared to deal with the situation.