U.S. airlines experienced a dramatic surge in jet fuel costs in March, spending $5.06 billion on fuel compared to $3.23 billion in February, marking a 56.4% increase following the onset of U.S.-Israel strikes on Iran and the effective closure of the Strait of Hormuz [1]. This spike represented a 30% rise from March 2025 levels, according to U.S. Department of Transportation data [1]. The escalation in fuel prices, which topped $4 a gallon in some markets in April as the conflict persisted, has led airlines to lower or scrap their 2026 financial guidance, citing jet fuel as their largest expense after labor [1].
In response to these cost pressures, some carriers have scaled back growth plans to reduce expenses and avoid excess capacity in a high-cost environment [1]. The impact has been severe for certain airlines; Spirit Airlines collapsed over the weekend, attributing its inability to emerge from bankruptcy mid-year to the surge in jet fuel costs [1]. Major carriers, during recent earnings reports, indicated expectations that customers would absorb the higher fuel costs by early 2027, or possibly by the end of 2026 [1].
Despite these challenges, consumer demand for air travel has remained resilient. In March, travel-agency ticket sales increased 12% year-over-year to $10.4 billion, with domestic trips up 5% and international trips up 1%, according to the Airlines Reporting Corp [1].
CONCLUSION
The sharp rise in jet fuel costs following the Iran conflict has significantly impacted U.S. airlines, forcing them to revise financial guidance and scale back growth. While some carriers, like Spirit Airlines, have succumbed to the pressure, overall travel demand remains strong. The industry anticipates passing on higher costs to consumers by late 2026 or early 2027.