A short distance north of Sheriff Drive, the route leaves the park, reaching the eastern terminus of Newton Road (CR 110).

Returning to the residential neighborhoods, NY 277 bypasses the hamlet of Ellicott, which is connected via Powers Road (CR 370).

NY 277 then crosses over Cazenovia Creek and enters the commercial hamlet of Ebenezer, where it intersects with Seneca Street (CR 215).

Continuing north through the town of West Seneca, passing east of Centennial Park and entering a junction with NY 16 (Center Road).

Passing Mount Hope Cemetery, the route goes north several blocks into an interchange with NY 400 (the Aurora Expressway) before crossing over tracks owned by Norfolk Southern.

The route soon becomes a residential boulevard as it winds north through Cheektowaga, crossing another creek into the Edgebrook Estates neighborhood.

The route then runs east of the entrances to the Walden Galleria and crosses through the commercial Maryvale section of Cheektowaga.

At this junction, NY 277 becomes known as North Union Road, reducing to two lanes as it passes more residences in Williamsville.

Now known as North Forest Road, the route winds northwest past multiple residences before reaching a junction with NY 324 (Sheridan Drive).

At the same time, the section of Union Road in northern Orchard Park was designated as part of NY 240.