Strait of Hormuz blockade threatens global fuel supplies and forces airlines to cut thousands of flights
Strait of Hormuz blockade cuts about 10% of global oil flows, threatening European jet-fuel supplies and prompting thousands of airline cancellations this month.
The Strait of Hormuz blockade has sent a delayed but mounting shock through global oil and jet-fuel markets, industry executives say, as tankers loaded before the closure have arrived and fresh shipments have ceased. Major oil bosses including Exxon Mobil’s chief executive warned that the full effects of the disruption have not yet been felt, and Chevron’s finance chief said commercial buffers are largely exhausted. Airlines and refiners are now racing to adapt to constrained kerosene supplies and sharply higher prices.
Industry leaders say inventories are depleted
Darren Woods of Exxon Mobil told analysts that the market has not yet absorbed the full impact of the supply interruption stemming from the Strait of Hormuz blockade.
Chevron CFO Eimear Bonner has warned publicly that commercial stockpiles and spare capacity have been largely drawn down, leaving minimal buffer for further shocks.
Andy O’Brien of ConocoPhillips noted the time lag between the stoppage and its effects at destination ports, saying that tankers that departed before the blockade have now all arrived and fresh flows have essentially halted.
Taken together, these comments underline a growing concern across oil majors that the market is entering a period of tighter physical availability rather than only price volatility.
Closure of the waterway removes roughly 10% of global oil flows
The Strait of Hormuz, the main artery of Persian Gulf crude exports, has been nearly closed for two months following military actions in the region, severely reducing tanker traffic.
Analysts estimate the interruption corresponds to roughly ten percent of global oil demand, a scale of disruption without recent precedent for the choke point.
Because many cargoes were already at sea when shipments stopped, the first visible impact was delayed; now those shipments have arrived and the market is beginning to absorb the true shortfall.
That lag means downstream users and national stockpiles are only now confronting physical scarcities that were set in motion weeks earlier.
Airlines cut schedules as kerosene tightens
The international aviation sector is among the first to show pronounced operational consequences, with data analysis firm Cirium calculating that carriers removed about two million seats from May schedules—equivalent to roughly 12,000 flights.
Air France–KLM has reportedly been instructed not to register additional services to fuel-sensitive hubs such as Singapore and Tokyo, as operators try to preserve kerosene stocks at critical nodes.
Kerosene prices in Europe have at times more than doubled compared with the start of the year, prompting carriers to alter networks and delay new services to high-demand long-haul markets.
Cirium’s figures indicate Lufthansa cut more flights than any other carrier in the May adjustments, while IAG’s chief warned that continued disruption could bring global restrictions on aviation fuel availability.
European dependence on Persian Gulf kerosene creates vulnerabilities
EU members imported about 10.3 million tonnes of kerosene from the Persian Gulf in 2025, accounting for over half of the bloc’s fuel imports and roughly a fifth of total EU consumption, industry data show.
That concentration of supply leaves European airports and carriers vulnerable if Gulf shipments remain curtailed or rerouted to higher-paying markets in Asia.
Argus Media analysts judge it unlikely that higher domestic production and alternative imports will fully replace lost Gulf volumes in the near term, and they forecast European kerosene could become scarce by June.
Experts expect smaller airports to face the most acute disruption while major hubs may retain relatively better access because of prioritisation and existing contracts.
Refinery limits and global competition for cargoes
Germany operates eleven refineries, eight of which make aviation kerosene, but technical constraints limit how quickly refineries can shift output from other products to jet fuel.
Some U.S. refineries could raise exports to Europe, yet competing demand from Asia—willing to pay higher prices—means cargoes are likely to be redirected where returns are greatest.
Industry sources note that damage to refineries in the conflict zone further complicates a fast restoration of supplies, and that even an end to the Strait of Hormuz blockade would leave markets balancing flows and repair timelines for months.
The global nature of crude and product markets means regional shortages can reverberate through pricing and logistics long after physical routes reopen.
German government measures and industry criticism
Berlin’s economics ministry has sought to reassure the public that there is currently “no quantity problem” for fuels used by road transport and aviation, while acknowledging higher prices at the pump.
Economics Minister Katherina Reiche has urged against alarmist reactions and convened a weekly crisis unit to monitor energy-market developments and plan contingency steps if physical shortages reach Europe.
The government has temporarily reinstated a reduced fuel tax on petrol and diesel until the end of June, reviving the so-called “tank rebate,” a move opponents in industry call counterproductive during a supply squeeze.
Critics argue that lowering pump prices weakens incentives to conserve fuel and can, in a shortage, exacerbate demand pressure; comprehensive consumption data from national authorities are only available with a substantial delay, limiting immediate policy feedback.
Market participants stress that even if diplomatic talks lead to a reopening of the Strait of Hormuz, normalization will not be immediate.
Industry and government officials say the combination of drawn-down inventories, damaged regional infrastructure and a global reallocation of cargoes means a multi-month period of tightness and elevated prices is the most realistic near-term scenario.
As airlines, refiners and governments scramble for alternatives, the coming weeks will test the resilience of supply chains and the effectiveness of policy responses to a disruption that began at a maritime chokepoint but is now surfacing across road, sea and air transport.
