Just ahead of the holidays, airlines around the U.S. are trying to upgrade their systems. Delta Air Lines, in particular, has a new boarding sign , aimed at controlling lines at the gate while avoiding large crowds trying to pile up onto a flight.

The major U.S. airlines will need every possible advantage as they try to solidify their performance following a bumpy period due to the government shutdown. During that time, we saw thousands of delays and cancellations across the top airlines in the world, including United Airlines, Southwest Airlines, American Airlines, and Delta Air Lines.

Despite the shutdown ending and the holidays looming, the major carriers have experienced some setbacks, particularly on Sunday. United Airlines saw yet another flight diverted, performing a midair U-tu

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