It starts on the A246 in East Horsley, one of the most affluent villages in the country. This fact is emphasised by the adjacent petrol station which is built of flints. The road heads north through the village and goes under the London to Guildford railway line by Horsley station.
Soon afterwards, the B2039 enters open country for about a mile before reaching the village of Ockham, birthplace of William of Ockham, father of the methodological principle known as "Ockham's Razor". Continuing west, the route skirts the disused Wisley Airfield before ending at a roundabout on the A3. The pre-bypass A3 (now numbered B2215) also reaches this roundabout.