Vienna to Denver (VIE–DEN) — Airlines, Schedules & Connections

Austria is part of the US Visa Waiver Program. Austrian passport holders can enter the United States for up to 90 days without a visa, but must obtain an approved ESTA (Electronic System for Travel Authorization) before boarding. Apply at the official CBP site. ESTA costs USD 21, is valid for 2 years, and covers multiple entries. Passport must be valid for at least 6 months beyond the planned stay. The 90-day limit cannot be extended, and overstaying voids future ESTA eligibility.

The City Airport Train (CAT) runs non-stop between Wien Mitte station and VIE in 16 minutes (€14.90 one-way, €24.90 return). The S7 commuter rail covers the same route with stops in 30–35 minutes for €4.20.Taxis are metered but expensive; expect €35–45 from the city center. Uber and ride-shares cost €25–35. Parking at VIE runs €8–14/day in the remote lot with shuttle.

RTD A Line runs to Denver Union Station (37 min, $10.50) with connections to light rail and bus routes. Taxis have meters; expect $55–65 to downtown.DEN's tent-roof Jeppesen Terminal is a single building; all three concourses connect via the underground automated train. Rental cars are on level 5. For ski resorts, shuttle services depart from Ground Transportation.

Semi-arid with 300+ days of sunshine. Summers are dry and warm (27–34°C) with afternoon thunderstorms that produce dramatic but brief delays. Winters bring cold temperatures (−8 to 5°C) and heavy blizzards that can shut down ground operations.

Spring snowstorms can be heavier than midwinter ones. Altitude (5,430 ft) means low humidity year-round; stay hydrated.