On these types of aircraft (as well as several others), the cabin window lines are interrupted by the existence of air conditioning riser ducts, window conduits, or electrical wiring embedded in the cabin wall, which makes placing a window there impossible for the manufacturers.

Passengers sued United and Delta for charging extra for "window" seats without windows.

"This discrepancy has led to passenger complaints and, now, legal action. The United Airlines lawsuit claims that this practice may violate consumer protection laws, as well as airline passenger righ...