NEW DELHI, April 16 -- India's second wave of covid-19 has cast a cloud over its airlines, which were barely recovering from the harsh lockdown of 2020.

Domestic passenger traffic has been rising every month since airlines returned to the skies in June. However, in the week ended 3 April, fewer Indians flew than the week before, the second straight weekly fall in passenger numbers. According to a report by ICICI Securities, an average of 239,000 people took domestic flights every day during the week, less than the 251,000 people who travelled in the previous week.

"The number of fliers per departure declined to 104 (week ended 3 April) from 109 (week ended 27 March) in the respective weeks," the report said, adding that rising covid- 19 c...