SR 277 begins as a signed secondary highway at an intersection with Lamar Avenue (US 78/SR 4) and Airways Boulevard in the Orange Mound community and continues north as Airways.

Continuing north it crosses under Union Avenue (US 70/79/64/SR 23) and picks up the former three routes, where it becomes an unsigned primary highway.

Local expressway Sam Cooper Boulevard terminates along SR 277 just south of the state route's northern terminus at North Parkway (SR 1)/Summer Avenue.

The Airways Blvd section is a 4-lane undivided urban street with a 35 MPH speed limit.

The majority of the East Parkway section is a 6 lane divided major urban arterial with a wide, treed median (except under the Union Avenue overpass).