Jet fuel is following diesel’s price jump as the Hormuz supply shock hits the skies

The disruption around the Strait of Hormuz is now showing up in aviation fuel, not just diesel. The same refinery constraints that pushed diesel prices higher are tightening jet fuel supply, because both products come from the middle of the barrel and compete for the same limited upgrading capacity. When refiners shift output toward one, the other tends to tighten in tandem.

That link matters because jet fuel demand is far less flexible than diesel in the short run. Airlines can adjust schedules only slowly, so higher jet fuel costs feed directly into operating expenses and, eventually, ticket pricing. For markets, the signal is that this is a refined-product story as much as a crude story: even if crude benchmarks calm down, cracks for middle distillates can stay elevated while supply chains reroute and inventories rebuild.

What to watch: whether the supply disruption proves temporary or structural, how quickly refiners can raise distillate yields, and whether jet fuel cracks stay aligned with diesel's. Those spreads, more than any single headline, will show how much of this is a passing shock versus a lasting squeeze.