Summer travel risks rising

Flight prices and heat alerts are colliding just as Europe’s summer booking season gets underway. In early April 2026, the International Air Transport Association said the global average jet fuel price had jumped 7.1% in a week to $209 a barrel, while Copernicus seasonal forecasts pointed to higher-than-average temperatures across Europe through the coming months. (iata.org) (climate.copernicus.eu) That combination hits travelers from two directions at once. Airlines pay more to move each plane, and holiday destinations across southern Europe face a higher chance of heat-driven disruption at the same time. (iata.org) (climate.copernicus.eu) The fuel side of the story starts far from the beach resorts of Spain or Greece. Jet fuel prices have surged as war involving Iran and the effective closure of the Strait of Hormuz tightened supplies of crude oil and refined products moving into global markets. (cnbc.com) That matters because jet fuel is usually an airline’s biggest expense after labor. CNBC reported on April 7 that carriers had already trimmed schedules, added surcharges, and raised fares or fees as fuel costs climbed. (cnbc.com) Europe is especially exposed when fuel markets tighten. Lufthansa said it was preparing contingency plans for possible demand drops or jet fuel shortages, and its chief executive, Carsten Spohr, warned those plans could include grounding some aircraft if conditions worsen. (cnbc.com) For travelers in the United Kingdom and European Union, that does not guarantee every ticket will spike overnight, but it does tilt the market upward. When fuel rises this fast, airlines usually respond with higher fares on routes where demand is strong enough to absorb the increase, especially in peak summer months. (cnbc.com) (iata.org) The second pressure point is heat. Copernicus, the European Union’s climate service, says the most likely signal across Europe in its current seasonal outlook is for above-average temperatures throughout the forecast range. (climate.copernicus.eu) That does not mean every day will be a heatwave, but it raises the odds of hotter spells in places already prone to summer extremes. Portugal, Spain, Greece, Italy, Turkey, and even the United Kingdom sit inside a broader European pattern where forecasters see warmth as the more likely outcome than cooler-than-normal conditions. (climate.copernicus.eu) (metoffice.gov.uk) Heat does not just make sightseeing uncomfortable. The European Union Aviation Safety Agency says climate change is increasing aviation exposure to heatwaves, storms, flooding, wind shear, and other weather hazards that can affect flight operations, aircraft performance, airport staff workload, and the reliability of airport and air traffic systems. (easa.europa.eu) Europe’s air traffic managers are planning around the same risk. EUROCONTROL and Airports Council International Europe said in guidance published in December 2025 that rising temperatures and more frequent extreme weather events are already disrupting airport operations, airline schedules, and air traffic management, and that the impacts will intensify without adaptation. (eurocontrol.int) For passengers, the real-world effects are familiar but costly. A hotter summer can mean longer delays on the tarmac, schedule changes during peak heat, pressure on airport cooling systems, and a greater chance that outdoor plans, day tours, and city breaks need to be shifted to early morning or late evening. (easa.europa.eu) (eurocontrol.int) The timing makes the warning harder to ignore. The Met Office said in December 2025 that 2026 is likely to be another year above 1.4 degrees Celsius over the pre-industrial average, extending a run of exceptionally warm years that has pushed heat risk higher across many regions. (metoffice.gov.uk) So the summer travel math for 2026 is changing. Travelers heading to southern Europe should expect a season where the flight may cost more before departure and the destination may demand more flexibility after arrival. (iata.org) (climate.copernicus.eu) The practical response is not to cancel every plan. It is to book fares that can be changed, avoid the hottest midday itineraries, choose lodging with reliable cooling, and think harder about shoulder-season dates or cooler destinations if your trip depends on long outdoor days. (eurocontrol.int) (easa.europa.eu)