You can still apply for compensation through AirHelp for up to three years after your flight was delayed, cancelled or overbooked.
Related questionsEU air passenger rights Questions about my claim What is AirHelp?
Airline strike or bankruptcy How much will AirHelp compensate when there is a claim? What if there is a case of force majeure? What steps are taken with a claim via AirHelp? How do I sign up for AirHelp? Do you have a suggestion or complaint? My rights when less than 3 hour flight delay How do I change my email address?