New Delhi: Widespread flight disruptions at IndiGo are credit negative, and refunds and compensation could cause it “significant financial damage”, credit rating agency Moody’s warned on Monday.

In a note, Moody’s said that regulatory penalties from the Directorate General of Civil Aviation (DGCA) remain possible as the airline failed to plan for aviation rules communicated over a year earlier.

The crisis struck as the airlines entered their peak winter schedule, with “significant lapses in planning, oversight and resource management” as the Phase 2 of the Flight Duty Time Limitation (FDTL) rules were introduced on November 1, 2025, after being communicated more than a year earlier, it noted.

The rules reclassified midnight–6 a.m. duties as night duty and cut permissible landings in 24

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