If you are denied boarding involuntarily due to an overbooked flight, you are generally entitled to significant compensation rather than just a simple refund. Under regulations such as EU261/2004 (and similar 2026 mandates in other regions), airlines must first call for volunteers. If you are "bumped" against your will, the airline must offer you a choice between a full refund of your ticket or re-routing to your destination at the earliest opportunity. In addition to this, you are typically entitled to "Denied Boarding Compensation," which can range from €250 to €600 (or roughly $675 to $1,500 in the U.S.) depending on the distance of the flight and the length of the delay caused by the re-routing. However, if you are denied boarding for reasons within your control—such as arriving late to the gate, lacking proper travel documents, or posing a safety risk—the airline is not obligated to provide a refund or compensation. In 2026, many airlines have digitized this process, allowing you to claim your "bumping" vouchers or cash transfers immediately via the carrier's mobile app at the gate.