I know nothing about football but...
There are two football finals with teams from the uk. Liverpool vs Tottenham and Man U vs Arsenal (I think). They are being played in Madrid and Baku, so thats approx 50,000 extra people travelling from the UK, by air.
I get that the locations where agreed in advance but AIBU to be annoyed that we are all trying to be environmentally friendly with reusable bottles and wooden sodding toothbrushes and those with power have no regard for anything other than money!