Cost and time trade-offs
Which London station you start from usually decides your best option. Victoria is the home of the Gatwick Express and Southern, so it suits west and central London. Thameslink is the quiet winner for the City and north London, running through St Pancras International, Farringdon, City Thameslink, Blackfriars and London Bridge straight to Gatwick without a change, which often beats doubling back to Victoria once you count the Tube leg. For a full Gatwick Express versus Thameslink breakdown, see our dedicated comparison.