CHICAGO, ILLINOISUnited Airlines is poised to finalize the largest aircraft orders in its history with more than 200 Airbus and Boeing jets as the airline renews its single-aisle fleet with newer generation jets.

The US carrier is expected to add 150 Boeing 737 MAX jets and more than 50 Airbus A321neos. The orders will be announced during investor and media events tomorrow.

The order highlights the vigor with which demand for new jets has snapped back in the U.S. following the historic collapse in air travel last year as the coronavirus pandemic swept the globe. United ordered 50 of Airbus’s long-distance A321XLR model in 2019 and has accelerated deliveries from previous MAX orders to capitalize on Americans’ surging demand for leisure travel.

The fleet strategy also furthers United Chief Executive Officer Scott Kirby’s goal of reducing the carrier’s carbon emissions and becoming an industry innovator battling climate change.