The Gatwick Express (GX) is perhaps most known for shuttling travelers back and forth between central London and Gatwick Airport. However, the train's route map also extends south of Gatwick to include trips to Haywards Heath, Burgess Hill, Hassocks, and finally, the seaside resort town of Brighton.

The Gatwick Express is designed as a high-frequency, non-stop service, but its "stops" depend on the direction of travel and occasional engineering works. Under the standard 2026 schedule, the train runs non-stop between London Victoria and Gatwick Airport South Terminal. The journey takes approximately 30 minutes and runs twice every hour. However, some services continue south beyond the airport to Brighton, making intermediate stops at Burgess Hill, Hassocks, and Preston Park during peak commuting hours. It is important to note that in early 2026, significant weekend engineering works on the Brighton Main Line often cause the Gatwick Express to use a "diversionary route." During these periods, the train may stop at Clapham Junction or even be replaced by Southern Railway services that make more frequent stops. For the fastest experience, always look for the dedicated red Gatwick Express trains, but check the live boards at Victoria Station, as the 2026 upgrades to the "Stoats Nest Junction" and track renewals near Purley can occasionally alter the non-stop nature of the service on weekends.