How many days should I spend in Sion on a first visit?
Give Sion one full, unhurried day for the Old Town, cathedral, Tour des Sorciers, Valère Basilica and Château de Tourbillon. Add a second day only for museums, wine-country wandering, an FC Sion match or using the city as a base for central Valais; a half-day is possible, but reduces it to a postcard stop.
Where should I stay in Sion?
Stay near the station, Old Town or Place de la Planta, where you can walk to nearly everything and avoid relying on buses. Outer areas such as Bramois, Uvrier, Châteauneuf or Champsec make sense only for a particular hotel, family visit or car-based onward plan; they are not the best first-time sightseeing bases.
Which airport is best for Sion, and how do I get there?
Geneva Airport is the natural choice: take the train toward Sion/Brig, direct on some services or with a simple change at Genève station, and allow roughly 2 hours to 2 hours 20 minutes. Zurich Airport takes about 2 hours 40 minutes to 3 hours 15 minutes by rail, so choose it only for a substantially better flight; do not rent a car for a one-city Sion stay.
Do I need to book any Sion attractions in advance?
No: the core sights are not reliable sell-outs. Decide Valère admission on the day, and treat Tourbillon and the Old Town as open-air visits; book ahead only for a timed special tour, major temporary exhibition, or travel and accommodation during a major regional event.
What is the best time of year to visit Sion?
Late April–June and September–October are the best all-round windows for comfortable walking, vineyard scenery and clear castle views. July and August can be intensely hot on the exposed hills, while November–March is quiet and atmospheric but brings shorter days and potentially slippery paths rather than dependable snow.
Can I get around Sion without a car, and how hard are the castle hills?
Yes—walk from the station to the flat Old Town in about 10 minutes, then continue on foot for the cathedral and both hills. Valère and Tourbillon are short but genuinely steep, uneven and exposed climbs: wear grippy shoes, refill water before setting out, and avoid the ascents in heat, ice or heavy rain.
Should I plan Sion around a festival or football match?
There is no single citywide festival that justifies planning an entire trip around it. FC Sion home matches and larger Valais events can tighten hotel availability, however, so check fixtures and the regional events calendar before booking.