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Rail corridor · Vienna → Zurich

Vienna to Zurich by train: connections, duration and CO₂ compared with flying

What actually runs between Vienna and Zurich, how long it typically takes, and how rail compares with flying and driving in a modelled CO₂e balance — calculation included.

Rail ≈ 790 km · flight 603 km great-circle (VIE → ZRH) · road 725 km

Model calculation · methodology v1.1 · not measured data

The connection

What runs on this corridor

ÖBB lists Railjet connections between Vienna and Zurich via Salzburg and Innsbruck. Its 2026 Switzerland brochure warns of longer journey times from 14 June to 12 December because of construction work.

Do not treat the usual roughly eight-hour routing or a through seat as a guarantee during the works. Check diversions, replacement transport and onward connections for your date.

Operator information reviewed on 11 October 2026. The emissions model below uses the declared usual-route distance; construction-related changes are not included automatically.

Operators
ÖBB Railjet · SBB · ÖBB Nightjet
Typical duration
Longer during 2026 construction works; check your date
Changes
Date-dependent during construction
Route
via Salzburg, Innsbruck, the Arlberg, Feldkirch and Buchs SG

Timetable sources:KlimaTicket Ö · validity map / GültigkeitskarteÖBB · Switzerland connections 2026 (PDF)ÖBB · timetable and construction information

Train vs flight vs car

CO₂e per journey: one person or one car

Each mode uses its own activity distance: rail the route length, flying the great-circle distance between airports, driving the routed road distance. Ranges come from the published factor bands, not from measurement error.

ModeFactor usedkg CO₂eRange
Traingrid model, endpoint average × 0.09 kWh/pkm6.2 g/pkm × 790 km4.9 kg2.0–7.8 kg
Flight128 g CO₂e/pkm, DESNZ 2026 short-haul with RF128 g/pkm × 603 km77 kg76–114 kg
Car (whole vehicle)166 g CO₂e/vehicle-km, DESNZ 2026 average car166 g/veh-km × 725 km120 kg40–203 kg

72 kg CO₂e

Difference, rail vs flight

About 94% below the flight value in this model — per person, one way.

How this was calculated

  1. Rail: the annual grid snapshot gives 110 g CO₂e/kWh for Austria and 28 g CO₂e/kWh for Switzerland. A cross-border leg averages its endpoint countries, so 69 g/kWh × 0.09 kWh per passenger-kilometre = 6.2 g CO₂e/pkm. Over 790 km of route that is 4.9 kg CO₂e per person. The range spans the two endpoint countries taken separately. Rounded scenario distance for the Railjet routing across the Arlberg, about 787 km, rounded to 10 km.
  2. Flight: UK DESNZ 2026 short-haul average passenger with radiative forcing, 128 g CO₂e/pkm (range 126–189), over the 603 km great-circle distance between the airport pair = 77 kg CO₂e per person. Great-circle distance is an approximation between airport coordinates, not the flown track, and it excludes getting to and from the airport.
  3. Car: UK DESNZ 2026 average car, 166 g CO₂e per vehicle-kilometre (range 55–280), over the 725 km routed road distance = 120 kg CO₂e per vehicle. That is the whole vehicle: shared between two or four people, the per-person figure drops accordingly.
  4. Cross-check: the static catalogue factor for national rail (31 g CO₂e/pkm) would give 24 kg over the same route. The grid model can sit well below it on low-carbon electricity. Rail figures cover electric intercity operation — diesel sections, actual occupancy and upstream energy are not modelled.
  5. All values are model calculations from published factors under Farleda methodology v1.1, not measurements, and describe one-way travel. Rail and flight are per person; the car row is per vehicle.

The record

What the signed record for this route looks like

When a plan for this corridor is saved in Farleda, the result is a Trip Carbon Passport: a canonical payload with distance, modes, rounded leg summaries, traveller count and declared methodology/comparison versions, signed by the server with HMAC-SHA256. Anyone can check any passport publicly, without an account. A valid result shows the payload has not changed since Farleda signed it — it does not prove the journey physically happened, and it is not an offset or a certificate.

Public access depends on the API release. The verification page explains the current access to the service.

Check a passport →

Tickets and coverage

What is and is not covered

  • The KlimaTicket Ö covers the Austrian section within its applicable tariff area, including specified border stations and foreign sections. The Swiss section needs its own ticket.
  • For corridor sections that run through Germany without a stop, the operators' tariff conditions decide what an Austrian ticket covers — check them before you travel.

Ticket rules change. Check the operators’ conditions and the KlimaTicket validity map linked below.

Questions

Frequently asked about this corridor

How long does the train from Vienna to Zurich take?

Exact journey times depend on the date and direction. Check the linked operator journey planner; the overview above describes the reviewed connection.

Is there a direct train from Vienna to Zurich?

Through Railjet services form the usual offering, but 2026 construction work can change the route and connections. Check your travel date before booking.

How much CO₂ does the train save compared with flying?

In our model calculation roughly 72 kg CO₂e per person one way: about 4.9 kg by rail against about 77 kg by air. Swiss and Austrian electricity are both low-carbon in the annual snapshot, which is why the modelled rail figure on this corridor is so small.

Can I continue to Paris from Zurich?

Yes — TGV Lyria links Zurich and Paris, which is why Vienna–Zurich is the usual first leg of the rail route from Vienna to Paris.

Does the KlimaTicket cover the trip to Zurich?

Only the Austrian part, within its applicable tariff area, including specified border stations and foreign sections. The Swiss section needs its own ticket.

How are the CO₂ figures on this page calculated?

Rail uses the Austrian and Swiss grid snapshot averaged and multiplied by 0.09 kWh per passenger-kilometre; flying uses 128 g CO₂e/pkm (UK DESNZ 2026, with radiative forcing); the car row uses 166 g CO₂e per vehicle-kilometre. The footnote under the table shows every step.

Farleda consumer beta

Plan Vienna → Zurich rail-first

Farleda plans European trips rail-first and records a saved plan as a signed calculation record. Public beta is planned for 31 October–31 December 2026; dates are planning targets and are updated openly.

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