Dutch airline KLM has announced that it will not resume flights to various Middle Eastern destinations before the middle of July.The carrier, part of the Air France-KLM group, confirmed on Tuesday that its services to and from Dubai are now suspended until at least 2 August.Flights to Riyadh and Dammam will also remain grounded until at least 12 July. These routes have been suspended since 1 March, with the airline citing the war in Iran and subsequent attacks across the region as the reason. KLM had previously indicated that services would not resume before 28 June.In April, KLM cancelled more than 150 European flights due to the rising cost of jet fuel amid the conflict between the US, Israel and Iran.A KLM Boeing 737-800 takes off from Manchester Airport (PA Archive)Prices have soared since the start of the war as increases in global oil prices filter through to aviation.The Dutch airline said it would not operate 80 return flights out of Amsterdam’s Schiphol airport over April and May.The flights are “currently no longer financially viable to operate” due to rising kerosene costs, it said.The head of the International Air Transport Association (IATA), meanwhile, has warned travellers to brace for higher air fares as airlines can no longer absorb the escalating costs stemming from disruptions in the Strait of Hormuz.Willie Walsh, IATA's director general, informed the BBC that while there is no immediate concern regarding potential jet fuel shortages, the inevitable consequence of rising fuel prices will be an increase in air ticket costs.He said: "There may be some instances where airlines will discount to stimulate some traffic flow… but over time it’s inevitable that the high price of oil will be reflected in higher ticket prices."Airlinesdramatically escalated flight cancellations for May, with data from aviation analytics firm Cirium showing 296 departures from UK airports were cancelled across the month, representing 0.75 per cent of the total scheduled flights.However, the outlook for the peak summer travel period appears more stable. Week-on-week schedule reductions for June remain limited at 48 fewer outbound flights, following the cancellation of 0.2 per cent of services. July has seen a reduction of 31 flights week-on-week, while August shows a minimal decrease of just four flights.