Sustainable aviation fuel still accounts for less than 1% of global jet fuel supply and costs two to five times as much as the conventional product — and Amazon has just decided to sell certificates in it at scale.

The company (Nasdaq: AMZN) has added SAF certificates to its carbon-inset portfolio, making them available through the Amazon Sustainability Exchange to suppliers, business customers and signatories of The Climate Pledge. The certificates represent verified environmental benefits from physical fuel, without requiring delivery to a buyer's specific flights.

Kyle Kornack, who leads carbon markets at Amazon, confirmed the launch Thursday. "At Amazon, we've been buying SAF certificates for our own flights – and now we can offer them to others, too," he said on LinkedIn.

What do the certificates actually deliver?

The mechanics matter more than the announcement. A SAF certificate separates the verified emissions benefit of physical sustainable aviation fuel from its delivery to a particular aircraft. A company cannot get SAF pumped into its own freight flights — supply is too thin for that — so it buys the claim instead.

The approach exists because the market is small. Aviation accounts for about 2.5% of global carbon dioxide emissions, according to Kornack, and SAF — which can be produced from waste fats and oils — remains a marginal slice of jet fuel supply at a steep premium.

In plain words: companies with air travel and freight emissions can now buy the environmental attribute of SAF that they physically cannot obtain.

Why price is the story

Amazon's core commercial argument is purchasing power. The company says its buying volume allows it to secure lower certificate prices, with savings passed on to its value chain and Climate Pledge signatories.

That positions Amazon as a volume aggregator in a nascent certificate market, not merely a corporate buyer. For suppliers under pressure to report Scope 3 reductions, a discounted, verified instrument tied to a named fuel stream is a simpler procurement route than negotiating SAF deals directly with airlines or producers.

Whether the discount is meaningful against a two-to-five-times cost premium remains the open question. Amazon has not published pricing.

The offering sits alongside existing carbon credits on the Sustainability Exchange, which serves companies eligible under Amazon's supplier and Climate Pledge programs. Businesses apply through the platform directly.

The takeaway: Amazon is converting its own SAF procurement into a resale channel for corporate decarbonization budgets.

What happens next

The program's credibility will rest on the same infrastructure that governs all insetting claims — verification of the environmental attribute, avoidance of double counting, and traceability back to physical fuel. Amazon says the certificates represent verified benefits; the market will look to the accounting standards behind that word.

Meanwhile, SAF supply itself keeps moving. Delta and Shell Aviation recently struck a five-year deal to boost SAF supply, a signal that airlines are contracting for physical volumes while certificate markets develop in parallel.

The milestone to watch is whether Amazon discloses certificate pricing and volumes — the two numbers that will tell buyers whether this is a genuine market or a marketing channel.

By Olivia Hart