FK's Lab on FK's LAB

About

Mon, 07 Sep 2026 00:00:00 +0000

I’m Fero. I work full-time, and in my free time I spend it on something I genuinely enjoy: data, analytics, and Power BI.

How I approach it

I don’t like guessing where I can measure instead. Before I build a report, I want to understand where the data comes from, how often it changes, and where it could be misleading. Only then does the visual design matter.

That’s exactly how the VIE/BTS Aviation Tracker came about — a project I built in my free time to systematically track how Vienna and Bratislava airports trade passengers between them. The full code and methodology are public.

Contact

Mon, 07 Sep 2026 00:00:00 +0000

Got a data problem, a dashboard idea, or just a question about the VIE/BTS project? Write to me — I answer personally.

✉️ Email
ferdinand.fojtlin@gmail.com

Dashboard

Mon, 07 Sep 2026 00:00:00 +0000

A live look at the data behind the VIE/BTS Aviation Tracker — monthly passenger numbers at Vienna and Bratislava airports, built on official sources and updated automatically.

About the data

Every number on the dashboard traces back to an official airport press release, an annual report, or real aircraft movement data (OpenSky Network). No estimates, no secondary sources.

Methodology & source code

VIE/BTS Aviation Tracker

Sun, 02 Aug 2026 00:00:00 +0000

I live in Bratislava, and lately it’s hard to miss how much is being written about our airport — record passenger growth month after month. In parallel, another story played out: both Wizz Air and Ryanair significantly scaled back their presence in Vienna in March 2026, after Austria introduced an aviation tax that Slovakia doesn’t have.

These two stories are really one. The neighboring airport is picking up exactly what the other is losing.