Yes, according to 2026 US Department of Transportation (DOT) and international regulations, you are entitled to a full cash refund if the airline makes a "significant" change to your schedule. In early 2026, a "significant delay" is generally defined as 3 hours or more for domestic flights and 6 hours or more for international flights. If the airline reschedules your departure or arrival beyond these thresholds—or if they change your arrival/departure airport or add a connection—you have the legal right to walk away from the trip and demand your money back to your original payment method, even if you held a "non-refundable" ticket. Do not feel forced to accept a flight voucher; the airline is required to provide cash if you request it after a major reschedule.