US legacy carriers like Delta successfully neutralized low-cost threats (Spirit, Frontier) by introducing "Basic Economy" fares. Leveraging their scale and loyalty programs, they could price-discriminate, matching LCC prices on a fraction of their seats while maintaining premium pricing on the rest, effectively starving competitors of the price-sensitive traffic they relied on.

Beyond low fares, Ryanair's long-term dominance stems from its financial strategy of investing when the industry is weak. The airline uses its large cash reserves to place massive, discounted aircraft orders with manufacturers like Boeing during slumps and opportunistically seizes market share when legacy carriers falter. This turns competitors' crises into major growth opportunities.

Fuel represents a much larger portion of a low-cost carrier's expenses (about a third) compared to legacy carriers (a fifth). This structural difference makes budget airlines significantly more vulnerable to fuel price shocks from geopolitical events, forcing them to take more drastic measures.

Airlines have massive fixed costs and low variable costs, but the leverage is capped by the number of seats. This creates intense pressure to sell the last seat at any price, crushing industry-wide pricing power and creating a situation with big downside and limited upside.

The most acute economic strain from the energy crisis is visible in refined products, not just crude oil. Soaring diesel and jet fuel prices are the immediate choke points, directly slowing freight, disrupting travel, and forcing airlines to cut routes, demonstrating a tangible impact on the real economy.

Unlike industries like railroads that consolidated after bankruptcies, failing airlines are often bailed out or have their cheap assets sold to competitors. This prevents the natural "cleanup" of bad operators, fueling a continuous cycle of price wars and capital destruction.

Reframe hedging not as pure defense, but as an offensive tool. A proper hedge produces a cash windfall during a downturn, providing the capital and psychological confidence to buy assets at a discount when others are panic-selling.

Despite massive uncertainty around jet fuel costs and availability, airlines continue scheduling flights to project optimism and maintain cash flow. The first carrier to announce significant cuts risks being 'eaten up' by competitors, revealing a game-theory dynamic where perception of strength is critical for survival, even if it contradicts operational logic.

To compare airlines, one must look at costs they actually control. Since fuel prices are set by global markets, analysts use "Cost per Available Seat Mile excluding fuel" (ex-fuel CASM). This metric reveals the true underlying efficiency of an airline's operations.