The lawsuit says that American Airlines and Alaska Airlines indicate that those are seats without windows. Passenger Aviva Copaken claims she paid between $45.99 and $169.99 for window seats on three United flights that ended up having a wall next to them. The airline refunded two of the three extra charges, the San Fransico Chronicle reported.

United Airlines recently filed a lawsuit against a popular online travel agency, accusing it of false advertising and illegally marketing and selling United flights.

Delta Air Lines and United Airlines were sued on Tuesday by passengers who claimed they paid extra money to sit in "window" seats, only to find themselves placed in seats next to a blank wall. Proposed class actions were filed against United in San Francisco federal court and against Delta in Brooklyn,