@Nuno Big national airlines (LOT / Lufthansa / KLM / British Airways) are much better than the cheap ones, as they fly to the US and therefore need to make their websites compliant with their (far superior) accessibility legislation. This work applies to the whole website, and therefore you will benefit from it even if you’re just flying within Europe. Flying with RyanAir / WizzAir is possible, but some things work better on Mac, some on Windows and some in the iOS app, so be prepared to need access to all three. From my booking experiences from literally a few days ago, RyanAir is only usable on Windows, while WizzAir is much easier to deal with on the Mac. Assistance wise, be sure to request assistance in advance (pick the "needs a walker" option if flying with Ryanair.) Airport assistance is usually fine if you speak the language of the country you're going to, those people often have issues with speaking English. The only exception to the rule I've found so far was Munich, Germany, where some of the staff could very well be confused for Americans if not for their (slight) accents. Also, use GoogleFlights for flight searches, especially if you're considering the cheap airlines.