Yes, you can claim both expenses and compensation from Ryanair if your flight is delayed or cancelled, provided the disruption falls under UK261 or EU261 regulations. If your flight is delayed by more than two hours, Ryanair is legally required to provide "Duty of Care," which includes food and drink vouchers and, if the delay is overnight, hotel accommodation and transport. If they do not provide these and you pay out of pocket, you can claim these expenses back by submitting receipts (keep them reasonable; they won't pay for luxury hotels or alcohol). Separate from expenses is compensation, which applies if your flight arrived more than three hours late and the delay was within the airline's control (e.g., a mechanical fault or crew scheduling, not bad weather or air traffic control strikes). Compensation amounts range from €250 to €600 per person depending on the flight distance. To claim, you must use Ryanair’s official online "Claims" form. Be persistent, as the airline may initially reject claims by citing "extraordinary circumstances," which you can challenge through an Alternative Dispute Resolution (ADR) body if necessary.