Delta Air Lines and United Airlines have been sued by passengers, claiming that they were charged an additional fee for a window seat, but found themselves sitting next to an empty wall.
Separate cases against the American carrier, each airline finds millions of dollars in losses for more than one million customers.
He said that companies do not state that seats are windowless during the booking process, even while charging premium for them.
United refused to comment as it is an ongoing legal case. The BBC has approached Delta for comment.
The lawsuits, which are equally words, seek the return of additional fees for the passengers, who said that they had paid for the window seats, but instead they became windowless.
Both cases, which have been viewed by the BBC, were filed by the legal firm Greenbum Obrantz.
Complaints stated that some Boeing and Airbus passenger aircraft consists of seats that do not cause windows due to air conditioning ducts, wiring or other components.
According to court documents, these seats have not been given green by Delta and United during the booking process.
The cases say that people buy window seats for various reasons, in which to address the fear of flying and motion sickness, to capture children or see.
Some passengers would not have chosen those seats – or were paid more for them – if they knew that they did not have windows, according to complaints.
Both airlines describe every seat along the edges of their aircraft as “window seats”, even when they know that some are not next to a window, the documents said.
Passengers can be charged more for selecting window seats than a standard seat.
The lawyers representing each case described the practice as “misleading” and “illegal”.
Other carriers, such as American Airlines and Alaska Airlines, operate the same jet, but disclose during the booking process if a window is not included in a seat, he said.
