United Airlines (UA, Chicago O'Hare) has added flights to 15 cities, increasing its capacity, it said, to give passengers connectivity options in case ultra-low-cost carrier Spirit Airlines abruptly collapses.

“If Spirit suddenly goes out of business it will be incredibly disruptive, so we are adding these flights to give their customers other options if they want or need them,” said Patrick Quayle, United’s senior vice president of Global Network Planning and Alliances.

The new flights start January 6, 2026, and include:

Spirit Airlines filed for a second Chapter 11 bankruptcy protection process in late August. It recently announced it would discontinue service at 11 markets across the United States, effective from October 2, 2025, as it negotiates with lessors and potentially reduces its fleet size.

In a statement, Spirit Airlines said "while we appreciate the obsession certain airline executives have with us, we’re focused on competing and running a great operation. Suggesting anything else is wishful thinking on the part of a high-cost airline looking to eliminate a low-cost competitor."