The Oxford to Bicester Line is a railway line linking Oxford and Bicester in Oxfordshire, England. Opened in 1850, later becoming part of a through route to Cambridge, it closed in 1967 along with much of the rest of the original line. The section between Oxford and Bicester was reopened in 1987 as a branch line, and closed in 2014 for a substantial upgrade in which it became part of a new route between Oxford and via High Wycombe. In addition, it is intended that by 2024 the original route eastwards will be restored as far as Bletchley allowing services to run to Bedford.