Average fleet age of European LCCs:
Easyjet: 7.4 years
Ryanair: 6.9 years
Wizz Air 4.6 years
Wow: 3.2 years
Vueling: 7.4 years
Eurowings: 9.6 years
Norwegian 3.8 years
Jet2: 14.5 years
I am fully aware that age does not necessarily reflect safety/reliability when it comes to aircraft, but Jet2 is clearly an outlier in terms of fleet age when it comes to European LCCs. Maybe Jet2 know better than other airlines?
Just for balance, the A319/320/321 or B737 fleets for major European FSCs are BA: 13.4 years, KLM 11.9 years, Air France: 14.2 years, Iberia 12.4 years, SAS 7.7 years, Lufthansa 12.8 years, Alitalia 13.1 years.