United Airlines, Inc. is a major American airline headquartered at the Willis Tower in Chicago, Illinois. United operates a large domestic and international route network spanning cities large and small across the United States and all six inhabited continents. Measured by fleet size and the number of routes, it became the third-largest airline in the world after its merger with Continental Airlines in 2010.

In 2023, United became the first U.S. airline to add Braille to aircraft interiors, helping millions of travelers with visual disabilities more easily navigate the cabin independently. According to the Department of Transportation, about 27 million people with disabilities traveled by air in 2019.

The airline currently has equipped about a dozen aircraft with Braille markings for individual rows and seat numbers as well as inside and outside the lavatories. United expects to outfit its entire mainline fleet with Braille by the end of 2026.

In addition to adding Braille, United is working with the National Federation of the Blind (NFB), the American Council of the Blind (ACB) and other disability advocacy groups to explore the use of other tactile navigational aids throughout the cabin such as raised letters, numbers and arrows.

According to prnewswire.com; en.wikipedia; Source of photos: the internet