Diegem features a compact and accessible layout, making walking a practical option for getting around certain areas. The town includes pedestrian-friendly pathways and a relatively flat topography, which can make short distances manageable on foot. However, some destinations may be spread out, and weather conditions, particularly during colder or wetter months, could impact the comfort of walking. While walking can be convenient for local errands or exploring nearby spots, it may not always be the most efficient choice for longer journeys within or beyond the area.

Cycling in Diegem is supported by a mix of dedicated paths and shared roadways, making it a practical option for getting around. The town is relatively small, and its proximity to Brussels and other nearby areas provides access to regional cycling routes, such as the F3 HST bicycle route connecting Leuven and Brussels. Dedicated bike paths and fietsstraten (bike-priority streets) enhance safety and convenience for cyclists. However, some routes may involve mixed traffic, so caution is advised. The compact layout of Diegem makes many destinations accessible by bike, but individual preferences and trip distances should be considered when planning travel.

Public transportation in Diegem is well-developed, making it a practical choice for getting around. The town has a train station centrally located, providing easy access to nearby areas, including Brussels. Buses also serve the region, offering additional options for local travel. The infrastructure supports seamless connections, and the compact nature of the town makes public transit a convenient choice. Walking to and from transit stops is manageable due to the short distances involved, and the availability of multiple transit modes ensures flexibility for travelers.