Studies were conducted to investigate the use of urea treatment for improving the low-temperature properties of jet fuel. In particular, we utilized differential scanning calorimetry (DSC), cold-stage microscopy, and ASTM freeze, cloud, and pour-point testing to characterize the changes in the fuel that occur upon urea treatment. We also used gas chromatography (GC) to study both the qualitative and quantitative changes that occur in the chemical constituents of the fuel. These studies show that urea treatment in the presence of an activator species, such as methanol, is quite selective and effective at removing long chain n-alkanes. The resulting fuel shows a substantial decrease in crystal formation observed via DSC and cold-stage microscopy. The fuel also displays a significant reduction in the measured pour and cloud points. Some of the practical issues in using urea treatment for jet fuel are also discussed.