For window areas that do not span great distances (think window lintel compared to garage door size), you should be able to get away without using supports. It's called bridges or bridging. I'm not familiar with Cura, so I can't advise where to look in the software to ensure that bridging is turned on.

Another option to consider is to use a slicer such as PrusaSlicer that allows you to place primitives mid-span that would turn a too-long bridge into two or three shorter versions. PrusaSlicer also allows you to "paint" locations to ensure supports or to exclude supports, providing a means to use the built-in support system in place of primitives. My experience with PrusaSlicer supports is that they remove very easily.