On this stretch it passes through the western edge of the Eglin Air Force Base training range.

After having an interchange with Interstate 10 (I-10) at exit 31, it shares a 4.6-mile (7.4 km) east–west section of US 90 until it reaches Milton where it turns north onto Stewart Street, and runs for another 30.4-mile (48.9 km) section from Milton, Florida northward to the Alabama state line, where it continues towards Brewton as Alabama State Route 41.

While within Milton city limits it becomes a divided highway between Ridge Crest Drive and Mitchell Cemetery near Whiting Field in Point Baker.

The route then runs west along Berryhill road for one block until it turns north again at Alabama Street.

It runs east from SR 87 as Langley Street into Whiting Field Naval Air Station, which bisects the road.