Originally Posted by KIXJNB

Unless it suits them in case the onward flight is overbooked. Happened to my family and me. We ran like the wind from our late TXL-MAD flight, arrived at the intercontinental flight's departure gate while other passengers were still boarding, but were refused to board ourselves.
Seemed like it was convenient for Iberia to assume we would never make it and use our seats to work through the waiting list.