Absolutely! Whole wheat flour can be a great option for making cinnamon raisin bread. It adds fiber, vitamins, and minerals that are lacking in refined white flour, making the bread more nutritious. Just keep in mind that whole wheat flour can make the bread denser and may alter the texture slightly compared to using white flour alone. You can also try using a combination of whole wheat flour and all-purpose flour for a balance of flavor and texture. Experiment and see what works best for you!