United Airlines confirmed its largest-ever order for Boeing and Airbus jets on Tuesday, lining up 270 planes in a push for post-pandemic growth with bigger jets for domestic flying. The order for 200 Boeing 737 MAX and 70 Airbus A321neo jets, worth $30 billion at list prices, will boost United’s seating capacity across it domestic network by almost 30 percent, allowing it to better compete for both premium and low-cost travel. The deal builds momentum for planemakers seeking to turn the page on the COVID-19 pandemic that ravished global travel and signals a strong bet on a recovery in hard-hit business travel. United Chief Executive Scott Kirby said it would “accelerate our business to meet a resurgence in air travel”. With the deal, America’s third largest airline by revenue will replace most of its regional jets and undertake a sweeping cabin overhaul with more premium seats, larger overhead bin space …