If you travel on the Gatwick Express you will be charged the more expensive but flexible 'any permitted' fare. If you travel on Southern you will be charged a lower fare. The fare charged is determined by the gateline which you enter or exit through at London Victoria.

Yes, you must pay for the Gatwick Express, and it is generally the most expensive rail option for traveling between Gatwick Airport and London Victoria. In 2026, a standard one-way fare typically costs around £20 to £23 if purchased on the day. However, many travelers are unaware that the Gatwick Express is part of the National Rail network, meaning you can pay using Contactless payment or an Oyster card by simply tapping in at the station barriers; this often provides a slight discount compared to paper tickets. It is important to distinguish this service from "Southern" or "Thameslink" trains, which run on the same tracks. While the Express offers a non-stop, 30-minute journey with dedicated luggage space, the Southern trains take only 5–10 minutes longer and are significantly cheaper. If you board the Gatwick Express without a valid ticket or without tapping in, you may be subject to a penalty fare, as the service is strictly monitored by ticket inspectors.