Portsmouth to Spa Road Trip: Ultimate Guide

The A3 from Portsmouth to the M25 and then the M20 to Folkestone traces a path once trod by Roman legions. Today, it’s a 450-mile drive to Spa, Belgium, crossing the English Channel via the Channel Tunnel. The first recorded road from London to Portsmouth was built in 1756 as a military route. Now, this journey blends coastal air with continental charm.

You will traverse three countries: England, France, and Belgium. The drive takes approximately 7-8 hours without stops. But the best stops between Portsmouth and Spa transform it into a memorable adventure.

• Distance: ~450 miles (724 km)
• Estimated driving time: 7-8 hours
• Key roads: A3, M25, M20, A16 (France), E40 (Belgium)

The route shifts from the South Downs (chalk hills near Portsmouth) to the flat plains of Flanders. Near Calais, the landscape opens into vast agricultural fields. In Belgium, the Ardennes foothills appear before Spa. This geography creates distinct visual breaks.

• South Downs: rolling hills with chalk cliffs
• Flanders: flat, straight roads through farmland
• Ardennes: forested hills, winding roads

For local commerce, stop at the marché in Bergues (France) for cheeses and patisserie. In Belgium, buy authentic spa water from the source at Spa town. The Spa Monopole company still bottles from the original springs. Roadside stalls sell Ardennes ham and local jams.

UNESCO World Heritage Sites: The route passes near the Nord-Pas de Calais Mining Basin (UNESCO, 2012) in France, a short detour to Lens. Also, the Grand-Hornu industrial complex is near Mons, Belgium. Both are within 20 minutes of the main route.

How long to drive from Portsmouth to Spa? The direct journey is about 7.5 hours, but we recommend allocating 2 days to savor the route. Fuel costs: at current UK prices, a petrol car (35mpg) will spend ~£80 on fuel; in France, diesel is cheaper. Overall budget for fuel: £100-£120.

• UK tolls: Dartford Crossing (£2.50) if not using Dart Charge
• French tolls: A16 from Calais to Lille (~€10)
• Belgian tolls: Viapass for trucks only; cars free

Fuel station distribution: Plentiful on UK motorways, but in France, note that stations on A16 autoroute close for lunch (12-2pm). In Belgium, stations are 24/7. For tips on finding hidden gems, check out how to find the best stops and hidden gems between cities.

Road quality is excellent on UK motorways and Belgian E40. In France, the A16 is smooth but has some old surfaces near Dunkirk. Night illumination is good except on minor French roads. Toll gates in France require credit card or cash.

• Family-friendly stop: Nausicaá National Sea Centre in Boulogne-sur-Mer (France) – Europe’s largest aquarium
• Pet-friendly: Channel Tunnel allows pets in vehicles; in France, rest areas have designated dog zones
• Fatigue management: Perfect nap spots: Kent services (UK) or Rest area Espace de Détente (France) near Saint-Omer

Hidden off-route spots: The abandoned Fort d'Ambleteuse (France) is a 17th-century fort, 5 mins from A16. In Belgium, the tiny village of Bouillon (15 mins from E40) has a medieval castle. For things to do between Portsmouth and Spa, consider a detour to Ypres (WWI memorials) or the Walibi theme park near Wavre for families.

Climatic conditions: The route experiences maritime climate; expect rain in UK and Belgium. The best scenic sunset spot is on the cliffs at Cap Gris-Nez (France) around 8pm in summer. Wind can be strong on the A16 near the coast.

Culinary infrastructure: In Kent, stop at the cobbled town of Rye for scallops. In France, Le Côte d'Opale serves moules-frites. In Belgium, friterie near Spa town offers authentic fries with andalouse sauce. For traditional cuisine, Brasserie de la Source in Spa serves Ardennes specialties.