The upcoming refuel requirement set to begin in 2025 will mandate European producers to blend sustainable aviation fuel (SAF) into conventional jet fuel. This regulation aims to gradually dictate the types of SAF used while ensuring a strategic rollout to maintain environmental benefits. However, concerns arise about the timing of the mandate, as it may push supply into the market at a price point that isn't consumer-friendly, leaving many to wonder about its impact on travelers in the U.S.