Dornbirn to Sion Road Trip: Alpine Cross-Border Guide

This route from Dornbirn (Vorarlberg, Austria) to Sion (Valais, Switzerland) covers about 280 km (174 miles) and takes roughly 3.5–4.5 hours via the A14, S16 Arlberg Schnellstraße, and A9 in Switzerland. A unique fact: the Arlberg tunnel (14 km) is one of the longest mountain tunnels in the world, bypassing the legendary Arlberg Pass—whose switchbacks were once the only way to cross the Alps.

The journey crosses three major Alpine passes and two distinct linguistic regions (German-speaking Austria and French-speaking Valais). For anyone asking 'is it worth driving Dornbirn to Sion?', the answer is a resounding yes: the ever-shifting panorama from gentle foothills to dramatic rhône valley is unmatched.

The route begins in the gentle green hills of Vorarlberg, transitions into the rugged limestone peaks of the Lechtal Alps, and ends in the sun-baked Rhône Valley surrounded by vineyards and the Bernese Alps. This is one of the best stops Dornbirn to Sion for photographers: the Arlberg region offers endless mountain vistas.

For a deeper dive into finding hidden gems, check out this guide on how to find the best stops and hidden gems between cities.

• Natural Landscapes: Arlberg Tunnel exit yields a sudden view of the St. Anton ski area; Swiss section shows the iconic Matterhorn (far distance on clear days near Visp).
• Local Commerce: Stop in Bludenz for Milka chocolate factory outlet. In Landeck, try Tyrolean speck. In Sion, the weekly market (Wed/Sat) sells Valaisan raclette cheese and dried meats.

Fuel stations are abundant along the Austrian A14 and A12, but become sparse in the Arlberg tunnel section. In Switzerland, A9 has well-spaced service areas. Estimated fuel cost for a standard car (7L/100km, €1.4/L in Austria, CHF1.6/L in CH) is about €50–€60 total. Fuel efficiency tip: use cruise control at 110 km/h on autobahns; the constant gradient changes can otherwise spike consumption.

Tolls: Austrian sections require a vignette (€9.90 for 10 days). The Arlberg tunnel has an additional €10.50 fee (cash or card). Switzerland requires a separate vignette (CHF40 for a year), but rental cars usually have one. Keep small change for tunnel tolls.

• A14/E60: Dornbirn to Bludenz – good 2-lane highway.
• S16: Bludenz to Landeck – mostly 2-lane, frequent overtaking lanes, one long tunnel (14 km) with speed limit 80 km/h.
• A12/E43: Landeck to Sargans – 4-lane autobahn with panoramic views of the Inn Valley.
• A9/E62: Sargans to Sion – winding through the Rhône Valley, narrow sections near Martigny.

The A9 in Switzerland has many tunnels with strict speed limits (80 km/h) and radars. The Arlberg tunnel has a dual-carriageway but is narrow; keep lane discipline. Winter tires are mandatory from November to April in both countries. Night driving is generally safe but beware of deer near forested sections.

Family-friendly stops include the Walderlebnispfad in Braz (just off S16) – a forest trail with puzzles for kids. In Sargans, the Sargans Castle has a children's museum. For pets, rest areas near Feldkirch (A14) have fenced dog runs. Fatigue management: the Möbel Pfister service area (A9, near Lausanne) has a quiet lounge for naps; earlier, the Arlberg tunnel east portal has a rest area with picnic tables.

Hidden off-route spots: the abandoned railway station at St. Anton am Arlberg (5 min from S16, turn off at St. Jakob) offers a eerie industrial ruin with alpine backdrop. Another is the tiny village of Vals (10 min from A9 near Visp) with its famous thermal baths.