The Abbey Line, also known as the St Albans Abbey branch line, is a railway line from Watford Junction to St Albans Abbey. The 6+1⁄2-mile (10.5 km) route passes through town and countryside in the county of Hertfordshire, just outside the boundaries of the Oyster Card and London fare zones. Its northern terminus, St Albans Abbey, is located in the south of the city, around 3⁄4 mile (1.2 km) away from the larger St Albans City station on the Midland Main Line. It is a semi-rural line and, due to its single-track operation, service frequencies are limited. The service is sometimes referred to locally as the Abbey Flyer.
