The global aviation industry is grappling with an unprecedented crisis stemming from the ongoing war in Iran and the effective closure of the Strait of Hormuz, a critical chokepoint through which a significant portion of the world's oil, including aviation fuel, typically transits. While the world is not anticipated to 'literally run out' of oil, the conflict has led to a severe supply crunch and skyrocketing fuel prices, impacting airlines, economies, and consumer travel plans worldwide.

Since the US-Israeli strikes on Iran commenced at the end of February, disrupting traffic through the Strait, global shipments of jet fuel and kerosene have fallen to record lows. Experts like Richard Green, professor of sustainable energy business at Imperial College London, clarify that despite 41% of European aviation fuel passing through Hormuz, the world's oil supply is not on the verge of depletion. Alternative pipelines, increased production in other countries, and refinery flexibility offer some mitigation. However, the more immediate and pressing concern is the dramatic surge in fuel costs. Prof Rafael Palacios, head of aeronautics at Imperial, notes that jet fuel prices have doubled in just two months, reaching levels comparable to car petrol prices from the previous year.

This surge has forced airlines into difficult decisions. On April 22nd, Lufthansa announced cuts of 20,000 flights, citing unprofitability. Spirit Airlines ceased operations, and Virgin announced fare increases, as did IAG, which owns British Airways. EasyJet, 70% hedged until September, introduced a 'book with confidence' policy to guarantee no price increases post-booking. Travel industry executives anticipate week-to-week price fluctuations, leading travellers to delay bookings and seek clarity. Smaller routes are expected to be the first to face cancellations. Data from aviation analytics firm Cirium reveals that airlines have already cut two million seats from May's schedules and over 13,000 flights, with Gulf carriers like Qatar, Etihad, and Emirates being particularly affected by airspace closures and rising fuel costs.

The economic ramifications extend beyond the aviation sector. In the UK, Work and Pensions Secretary Pat McFadden warned of potential job losses and broader labor market implications due to the Middle East chaos. The conflict is expected to cause an effect on prices through energy costs, despite a recent dip in the UK jobless rate to 4.9% in February. While a closely watched survey suggested a rebound in the UK's services sector in April, experts cautioned that firms face a 'short-lived' recovery amid surging costs and lower demand, citing inflation pressures, global supply shortages, and elevated borrowing costs.

Concerns are growing over summer holiday plans. Travel experts warn of up to 85,000 flight cancellations in June if the Iran war continues to squeeze jet fuel supplies, equating to about 10% of total flights. Paul Charles of The PC Agency advises airlines to cancel flights in advance to minimize passenger inconvenience. Richard Murphy, emeritus professor at Sheffield University Management School, suggested a 'very good chance you may not be able to get your summer holiday this year,' predicting acute fuel shortages, supply chain disruption, and business failures by late June. The International Energy Agency warned on April 16th that Europe had only six weeks of jet fuel left before shortages begin. Matt Smith, Kpler director of commodity research, described the situation as a 'slow motion car crash,' anticipating further cancellations across different regions and potentially higher baggage fees as airlines attempt to recoup costs.

Governments and international bodies are attempting to address the crisis. Donald Trump initially launched 'Project Freedom' to escort stranded tankers but later paused it to pursue a peace deal, with little evidence of progress. US Secretary of State Marco Rubio reiterated demands for Iran to agree to a nuclear moratorium and reopen the Strait. Meanwhile, a French-British plan for the Strait of Hormuz is underway, distinct from the US mission. France has repositioned its nuclear-powered aircraft carrier Charles de Gaulle and its escorts into the Red Sea, closer to the Gulf chokepoint, in preparation for a potential mission. However, operations will not begin until the threat to shipping subsides and the maritime industry is reassured enough to use the strait, where war-risk insurance premiums have soared four to five times above pre-conflict levels, leaving around 2,000 ships stranded.

The UK government has introduced a temporary rule change allowing airlines to group passengers from different flights onto fewer planes to save fuel, a move criticized by consumer groups. Both the Prime Minister and Sir Keir Starmer have warned Britons about potential changes to summer holiday plans, contradicting the government's official messaging of 'no current need to change upcoming travel plans.'

The turmoil has also impacted related industries. Trainline, a UK-based international rail ticketing agent, reported that the Middle East tensions are affecting its revenues, with rail ticket sales to foreign visitors to Europe declining. The company anticipates flat or declining revenues for the coming year due to consumer uncertainty around summer travel.

In the long term, this crisis could act as a catalyst for 'jet zero' – post-fossil-fuel aviation. Professor Green quotes Sheikh Ahmed Zaki Yamani: 'The cure for high oil prices is high oil prices,' suggesting people adapt by seeking alternatives. Prof Palacios highlights two main alternatives to kerosene: synthetic fuel and hydrogen. Synthetic fuel, a reverse process of combustion, is technologically feasible but requires immense renewable electricity, making it ten times more expensive. Hydrogen burning, demonstrated by Rolls-Royce in a jet engine, faces challenges due to the need for cryogenic treatment and the complete overhaul of existing aviation infrastructure. Furthermore, a revolution in aircraft fleet efficiency is needed, with prototypes for more fuel-efficient planes emerging. However, these innovations require global buy-in and entail a 'quantum change in cost,' making them a 50-year transition. Palacios believes crises can accelerate such transitions if technology is sufficiently advanced.

The consequences of sustained high oil prices extend beyond aviation, affecting lower-income countries dependent on commodities from the Gulf. While the long-term vision is for the 'oil age to end long before the world runs out of oil,' as Yamani famously said, the immediate impact is a 'dark cloud' of economic damage and disruption. Flying, already an elite activity for a significant portion of the global population, risks becoming even more exclusive. This systemic crisis, affecting routing, pricing, and confidence, underscores the intricate interconnectedness of the global economy and the urgent need for sustainable energy solutions.