India’s largest airline IndiGo is facing its sharpest round of earnings downgrades since the pandemic as analysts reassess its financial outlook following operational disruptions, the rollout of new Flight Duty Time Limitations (FDTL) rules and a worsening cost environment. Despite the short-term pressures, brokerages continue to underline the airline’s strong long-term competitive position.

Shares of InterGlobe Aviation, which operates IndiGo, were trading flat at around ₹4,928 at 10:30 a.m. after eroding nearly 17% since disruptions began on November 27 and falling about 21% from the August 18, 2025 peak of ₹6,225.

Jefferies flagged the FDTL regime as a structural drag on IndiGo’s cost base, noting that the airline is more vulnerable due to its highly optimised, lean operating model. The brokerage expects near-term earnings pressure from disrupted flight schedules, higher crew requirements, rupee weakness and rising non-fuel costs. It has cut its FY26 EPS estimate by 18%, factoring in higher staff costs and weaker utilisation.

IIFL delivered the most aggressive downgrade, slashing FY26 earnings estimates by 64%. It cited the combined impact of rupee depreciation, elevated jet fuel spreads and inadequate preparedness for the FDTL transition. IIFL warned of a “structural increase in costs” and flagged potential medium-term regulatory resistance to IndiGo’s dominant market position. It now estimates employee cost per ASK rising from ₹0.47 in FY25 to ₹0.55 by FY27, while trimming FY27 and FY28 EPS by 12–14%.

Kotak Institutional Equities compared the current disruption to Southwest Airlines’ 2022 operational meltdown, arguing that forced operational resets, higher penalties and weaker reliability will permanently push costs higher. It cut FY26 EPS by 26% and expects ASK growth to slow as IndiGo lowers utilisation and rebuilds buffers in crew rosters. FY27–28 earnings were lowered by 8%, reflecting reduced ASKs and profitability erosion from higher investments in pilot strength, technology, training and compliance. Kotak also cautioned that penalties linked to the cancellations could further deepen the earnings drag.

Across coverage, analysts agree that IndiGo’s strategic edge remains intact due to industry consolidation, aircraft supply constraints and its unmatched fleet delivery pipeline. However, they also warn that a key part of its historical structural cost advantage may erode as the airline hires aggressively, moderates utilisation and operates under tighter regulatory scrutiny.

While operations are expected to stabilise by mid-December, brokerages now view FY26 as a reset year, marked by thinner margins, currency-linked cost pressures and only a gradual recovery in profitability thereafter.