Non-stop in 16 minutes: CAT is the business-trip option
The City Airport Train (CAT) runs non-stop between Vienna Airport (VIE) and Wien Mitte in about 15–16 minutes, aiming squarely at business travellers and carry-on-only flyers who value speed and in-town check-in more than its roughly €14–15 one-way fare. Trains come every 30 minutes during operating hours, so you’re paying roughly double the S7 price to save about 10 minutes and get a quieter, more polished train.
CAT trains leave from the airport rail station below terminals 1, 1A, and 3, using the same general concourse as S7 and Railjet but with very visible green branding and heavy advertising. At the city end, CAT terminates at Wien Mitte station, where you can change to U3 or U4 on the U‑Bahn for one stop to Stephansplatz or further around the Ring. Factor in 5–15 minutes for that U‑Bahn hop, since CAT tickets do not include local transit and you’ll need a separate Wiener Linien ticket or pass.
Standard adult tickets for CAT run about €14–15 one way and higher for returns, with small discounts if you buy online in advance or bundle a return. Compared with the S7’s few-euro fare, Reddit threads routinely call CAT “overpriced for what it is,” especially once you realize the real door-to-door difference can shrink to just a few minutes once you add connections. Some locals on r/Vienna even say they only touch CAT when an employer is paying.
The distinctive feature is the in-town airline check-in and baggage drop at Wien Mitte, which works only with specific airlines such as Austrian and usually has cut-off times around 75 minutes before departure. Several travellers arrived at Wien Mitte expecting to check in for low-cost carriers like Ryanair or Wizz and found they were not supported, so always check your airline list on CAT’s site before banking on that service.
Onboard, CAT runs every 30 minutes with modern rolling stock, plenty of luggage racks, and a calmer cabin than the busier S7 or Railjet cars. Some users note that trains can feel half-empty during off-peak times, which matches the common impression that locals prefer S7 or Railjet, leaving CAT to tourists, business-class passengers, and flyers rushing a tight departure. Seats are standard rail seats, not lie-flat or anything premium, but they’re clean and better spaced than many regional trains.
Regulars often combine modes: they take the cheaper S7 or Railjet inbound from VIE, then buy a single CAT ticket outbound from Wien Mitte when cutting it close for an evening Austrian flight in business and wanting checked luggage accepted at the city station. A frequent flyer on Reddit even times their arrival at Wien Mitte specifically to hit the Austrian check-in desk before the 75‑minute cut-off, then rides the 15‑minute CAT to VIE with boarding pass in hand.
Step-by-step: using CAT between VIE and Wien Mitte
- 1. From arrivals in terminals 1, 1A, or 3, follow the green CAT signs down to the airport train station, which is in the basement level and shared with S7 and Railjet.
- 2. Buy your CAT ticket from the green machines or online for about €14–15 one way, and remember this fare does not cover U‑Bahn or tram rides beyond Wien Mitte.
- 3. Check the departure board for the next CAT, which runs every 30 minutes, and head to the clearly marked CAT platform, usually signed as a dedicated non-stop service to Wien Mitte.
- 4. Board the train, stow larger bags in the luggage racks near the doors, and use the roughly 15–16 minutes of travel time to sort your U‑Bahn ticket or hotel directions.
- 5. On arrival at Wien Mitte, follow signs to the U3 or U4 platforms if you’re heading to Stephansplatz or along the Ring, or head upstairs to the CAT check-in area if your airline and timing allow city baggage drop.
One practical tip: if you care more about value than comfort, walk past the big CAT billboards at the airport station and compare the S7 or Railjet timings on the departure board before you commit to paying CAT prices.