Ifdelayed currently covers flight disruptions that are clearly defined by EU Regulation EC 261. This includes defined compensation amounts for delays, cancelations, and boarding denials for EU flights.
While passengers can personally file additional claims directly with the airline for expenses due to flight disruptions, the law is less clear on the details, leaving much more of the process up to the airline’s discretion. Passengers must be able to document the expenses and prove that the airline is liable.
Travelers on international flights can file a claim with the airline under the Montreal Convention for reimbursement of damages, including incurred expenses due to flight disruptions. And EU passengers should take note that EU law requires airlines to cover expenses for meals and refreshments at the time of the disruption, under many circumstances.
In addition you can always reach out to your insurance/credit card company as most travelers have some kind of cover that way.