United Airlines buying 270 new aircraft in push to swap regional jets for bigger planes, will add flights from Chicago

The new aircraft order — the largest in United’s history — will add 50 Boeing 737 Max 8s, 150 737 Max 10s and 70 Airbus A321neos to its fleet over roughly the next five years. In total, the airline has more than 500 new single-aisle aircraft on order, including 25 Boeing 737 Max jets ordered in March, with 40 set to arrive next year and 138 in 2023.