Airports, handling, and en route charges: En route costs were pressured by higher navigation charges across the network. Airport costs were described as elevated after the airline’s growth slowed due to engine groundings, which reduced expected incentives and rebates; management said redeploying capacity and returning to growth should help recover those benefits over time.Depreciation: Management cited higher “maintenance depreciation” as the fleet ages, noting a greater share of aircraft eight years or old ...