By air Ryanair operates low-cost flights from Luton (daily), Liverpool or East Midlands to Nimes (Garons), 40 mins transfer by car. Ryanair also operate a daily flight from Stansted to Montpellier, 1 hr transfer.
EasyJet have a daily low-cost flight from Gatwick to Marseilles (Marignane), 1 hr 50 mins transfer and British Airways operates flights from Gatwick to Montpellier and Marseilles.

Please note, many flights are seasonal and timetables can change. A car is essential; rental companies are available at Nimes, Marseilles and Montpellier Airports and also at Nimes Railway Station - Avis, Hertz and Europcar.

By rail a regular TGV service operates from Paris to Nimes (4.5 hrs).

By road the simplest route is the A26 autoroute from Calais and the A6/A7 Autoroute de Sud through Lyon to exit 19 at Bollene or continue on the A9 to exit 25 at Nimes (West).
Instead, from Paris you can join the A10/A71 autoroute to Clermont-Ferrand, then cross the Central Massif on the A75 to exit 39 and take the N88/N106 over the Cevennes mountains to Alès; a spectacular journey. Alternatively, continue a little further down the A75 to the awesome new Viaduc de Millau, then cut across the lower Cevennes from exit 48 on the D7/D999.