The A919 runs through the East Fife town of Leuchars.
It starts off in Guardbridge on a roundabout with the A91. Immediately to the east on the A91 is the Bridge over the River Eden, after which the village is named. The A919 then heads north past a semi derelict industrial site which stands at the head of the estuary and through the village. There is then very little open country left before the perimeter fence of RAF Leuchars is reached on the right. The former route forked right here and ran past the RAF base and through the town centre; however, the A919 now bypasses some of Leuchars to the West along a former railway line. The road then rejoins its original route by turning left at a roundabout. It runs alongside the Edinburgh to Dundee railway line to St Michaels, where it ends at a TOTSO staggered crossroads with the A914 (former A92) to the left and then the B945 turning north.