Thousands of air travelers in the UK have had their plans disrupted due to a major air traffic control issue that caused nearly 2,000 flights to be canceled or delayed. These disruptions have left many passengers stranded or facing unexpected delays. While airlines are required to assist passengers in such situations, the rights and compensation available depend on factors like the airline, the airport, and the cause of the delay or cancellation. Importantly, compensation is only available if the airline is at fault, not if the problem stems from external factors like air traffic control issues. Regardless of the reason for a flight delay or cancellation, UK and EU-based airlines, and other carriers operating from UK or EU airports, are legally required to provide certain forms of assistance to affected passengers. This includes meals, accommodation if needed, and alternative travel arrangements to get passengers to their destination. Airlines should arrange for a replacement flight without additional cost. If passengers incurred extra expenses, such as unused hotel bookings, they may need to file a claim with their credit card provider or travel insurance company. However, the coverage of such claims depends on the specific terms of the insurance policy. If a flight is covered by UK law, passengers are entitled to choose between a refund or a rebooking on an alternative flight, regardless of how far in advance the cancellation was made. This means that if a return flight’s outbound leg is canceled, passengers can receive a full refund for the ticket. If they still wish to travel, the airline must find an alternative flight. If another airline offers a significantly faster option or other suitable transport is available, passengers can request to be booked on that alternative. For flights arriving in the UK on non-UK or EU airlines, passengers should check the specific terms of their booking. If a flight is canceled or delayed, passengers stranded at the airport or abroad are entitled to additional support, including food and drink, communication assistance, and free accommodation if they need to stay overnight. Airlines must also provide transport to and from the accommodation. If the airline cannot provide this assistance, passengers can arrange it themselves and claim the costs later. The Civil Aviation Authority advises keeping receipts and avoiding unnecessary expenses. Passengers are also entitled to the same assistance if their flight is delayed for more than two hours (short-haul), three hours (medium-haul), or four hours (long-haul). If a delay exceeds five hours and the passenger no longer wishes to travel, they can request a full refund. For those who booked a package holiday with an ABTA member, passengers are entitled to a suitable alternative flight or a full refund if their flight is canceled. However, disruptions caused by factors like air traffic control issues, bad weather, or strikes do not qualify for additional compensation. If the airline is at fault, passengers are entitled to certain rights under UK law, depending on the reason for the cancellation and the notice given. Compensation amounts vary based on the distance of the flight, with higher compensation for longer distances. However, airlines and insurance policies typically do not cover lost wages. If delays cause work absences, passengers should inform their employer and agree on how to handle the situation, as employers are not legally required to pay for such absences unless specified in the employment contract.