The present Welwyn Garden City station opened on 20 September 1926; the halt was closed at the same time.

[3][5] Prior to this, services to Luton and the Hertford line, which cut east through the town, were handled from nearby Hatfield.

[5] Platform 1 (the outer face of the up island) sees only occasional use, as it has no direct access for northbound (down) terminating trains or empty units coming into service from the carriage sidings.

The platform is mainly used for peak time weekday Thameslink services to Sevenoaks, via St Pancras.

[10] Oyster cards are not accepted on journeys to Welwyn Garden City, but contactless payment has been available since late 2019.

The train operating company, Govia Thameslink Railway, agreed to extend London Zonal Fares to include Potters Bar by September 2015 when they won the Great Northern franchise.

[12] All off-peak services at Welwyn Garden City are operated by Great Northern, using Class 387 and 717 electric multiple units.

[15] The station is also served by several bus routes operated by Arriva Shires & Essex, Centrebus and Uno.