United and Delta are facing lawsuits brought by passengers who said they paid extra for a window seat, only to sit against a blank wall.

Some passengers feel more comfortable flying with a window seat, and, as every traveler knows, you can sometimes pay more to ensure you get one. However, a law firm is alleging that some airlines, such as Delta and United,

United and Delta charge hundreds of dollars for such seats and make no mention that they are without windows. Meanwhile, their competitors, American and Alaska Airlines, inform their customers that these types of seats do not have a window while booking, Reuters reported.