I am looking for a free database with complete and accurate airline schedules, especially for major European carriers.
I know there is https://openflights.org/data.html but I find the accuracy of the data very low or at least heavily outdated.
Can you point me to some other, free sources? It can even be a website one could copy content from, not necessarily a csv or an API.
This is for academic use only. Maybe some paid sources have other policy for non commercial use?