In 2026, obtaining a full refund depends on specific "Passenger First" regulations. Under U.S. DOT and global rules, you are legally entitled to a 100% cash refund if the airline cancels your flight, makes a "significant change" (defined as a delay of 3+ hours for domestic or 6+ hours for international), or if you cancel within the 24-hour "look-in" window (provided the flight was booked at least 7 days before departure). If you simply change your mind on a "non-refundable" ticket outside these windows, you typically only recover taxes and fees, not the base fare. However, many airlines now offer "Refundable" fare classes or third-party "Cancellation Protection" that guarantees a full refund for any reason. Always check if your delay meets the 2026 statutory threshold before accepting a voucher, as airlines are now prohibited from forcing credit shells on passengers who prefer cash.