High Quality Content by WIKIPEDIA articles! Interstate 680 (abbreviated I-680) in Nebraska and Iowa is the northern bypass of the Omaha, Nebraska – Council Bluffs, Iowa, metropolitan area. I-680 spans 42.86 miles (68.98 km) from its western end in western Omaha to its eastern end near Neola, Iowa. For a 10-mile (16 km) stretch, I-680 is co-signed with I-29. The freeway passes through a diverse range of scenes and terrains – the urban setting of Omaha, the Missouri River and its valley, the rugged Loess Hills, and the farmland of Pottawattamie County, Iowa.