War with Iran Has Aviation Costs Sky High. Are There Alternatives to Jet Fuel?

Why It Matters

Rising fuel costs threaten airline profitability and accelerate the push for viable, low‑carbon jet fuels, reshaping the aviation industry's supply chain and investment landscape.

Key Takeaways

• Jet fuel prices surge due to Iran war, prompting flight cuts
• Sustainable aviation fuel supplies roughly 0.6% of global jet fuel
• SAF feedstocks span cooking oil, waste, and even human sewage
• Only 10 of 165 announced SAF projects have commercial output
• Cascadia accelerator seeks to de‑risk and scale diverse SAF technologies

Pulse Analysis

The geopolitical shock from the Iran‑Russia war has sent jet‑fuel benchmarks to multi‑year highs, squeezing airline margins and prompting route reductions across Europe. Traditional petroleum‑based jet fuel accounts for the overwhelming majority of aviation energy, and its price volatility now directly impacts ticket costs and airline cash flow. This pressure has revived interest in alternative fuels, especially Sustainable Aviation Fuel (SAF), which can be blended with existing jet fuel without requiring aircraft redesigns. SAF’s appeal lies in its potential to cut lifecycle carbon emissions by up to 80%, a critical factor as regulators tighten emissions standards worldwide.

Despite the promise, SAF remains a niche product, representing only about 0.6% of global jet‑fuel use. The sector faces a classic supply‑demand mismatch: feedstocks such as used cooking oil, agricultural residues, municipal waste, and even treated human sewage are abundant in theory but fragmented and costly to convert at scale. A Reuters analysis highlighted that of the 165 SAF projects announced in recent years, merely ten have achieved commercial production levels, underscoring the technology’s early‑stage status. Moreover, bio‑based SAF raises concerns about land‑use competition and food‑price inflation, prompting investors to demand clear risk‑mitigation strategies.

To bridge the gap, public‑private collaborations are emerging. The Cascadia Sustainable Aviation Accelerator, launched by Alaska Airlines and Washington state leaders, exemplifies a regional effort to de‑risk SAF development by supporting a portfolio of feedstock pathways, including innovative sewage‑to‑fuel processes. Such accelerators aim to lower capital barriers, standardize certification, and create a pipeline of scalable projects. If successful, they could unlock the economies of scale needed to bring SAF prices closer to conventional jet fuel, offering airlines a viable hedge against future geopolitical disruptions while advancing industry decarbonization goals.