Asian airlines are cutting flights and increasing fares as soaring jet fuel prices, exacerbated by the conflict in Iran, challenge regional profitability. Carriers are making significant network reshuffles to manage costs and protect key flight routes.

Asian airlines are cutting flights, raising fares and reshuffling networks as the Iran war sends jet fuel prices soaring, leaving carriers across the region scrambling to protect their margins and preserve key routes. The shock has hit Asia especially hard because many economies depend heavily on fuel flows from the Middle East, according to aviation analysts, and some regional carriers are less protected from sudden price spikes than their counterparts in Europe or the US. “The impact has been....