Another reason for the decline, aircraft fitted with first-class cabins are less flexible. If an aircraft configured with economy and business class seats is taken offline, substituting it with an aircraft with first-class seats is a loss maker for the airline since there's little demand for those seats.

The primary reason airlines are retiring traditional First Class cabins in 2026 is the "Narrowing Gap" between Business and First Class. Modern Business Class products, like the Qatar Qsuite or the BA Club Suite, now offer lie-flat beds, direct aisle access, and privacy doors—features that were once exclusive to First Class. From a financial perspective, First Class suites take up a disproportionate amount of space; an airline can often fit two or three highly profitable Business Class seats in the same footprint as one "Ultra-Luxury" First Class suite. Additionally, corporate travel policies have become stricter, with most companies now capping employee travel at Business Class, significantly reducing the "paying" demand for First Class. Consequently, airlines like American Airlines and Cathay Pacific are focusing on a "Premium Heavy" Business Class model, sometimes adding a "Business Plus" front row to capture the remaining ultra-wealthy market without the massive operational cost of a dedicated First Class cabin.