Update 2022-01-25 (3): According to current reports, air traffic will remain largely suspended until at least 11 am on Wednesday (26 January, local time).
Update 2022-01-25 (2): Although a number of flights has been allowed again, as of Tuesday afternoon (25 January, local time), at least 500 flights remain canceled for Tuesday (25 January).
Update 2022-01-25 (1): On Tuesday afternoon (25 January, local time), air traffic resumed and the first flights landed again at Istanbul airport.