United Airlines Holdings Inc. (NASDAQ:UAL)

The data indicates a consistent upward trend in the expenses related to aircraft fuel, spare parts, and supplies, net of obsolescence allowance, over the five-year period from 2020 to 2024. Starting at 932 million US dollars in 2020, the costs increased moderately by 2021, reaching 983 million US dollars. This upward movement continued through 2022 with a more pronounced rise to 1,109 million US dollars. A significant acceleration is observed between 2022 and 2023, where the figure jumps to 1,561 million US dollars, representing the largest single-year increase within the timeframe. The upward trend persists into 2024, with a slight increment to 1,572 million US dollars.

This pattern suggests growing operational costs in areas critical to aircraft maintenance and operation. The substantial increase from 2022 onward may reflect external factors such as rising prices for aviation fuel and parts, increased operational activity, inflationary pressures, or shifts in supply chain dynamics. The relatively smaller growth between initial years indicates stable but increasing spending, with a spike in recent years that could impact overall cost management and profitability if not addressed or offset by revenue growth or efficiency improvements.