< PrevNext > 55. Walmart Bentonville, Ark. Share 2020 U.S.-Booked Air Volume: $14 millionBTN estimates retail giant Walmart in 2020 reduced U.S.-booked air volume by about 75 percent. The company currently permits business travel to its stores, distribution centers and fulfillment centers but otherwise is limiting travel to business-critical needs.The company’s revenue for its 2021 fiscal year, which ended Jan. 31, 2021, was nearly $559.2 billion, up 6.7 percent from the prior fiscal year. Walmart had about 2.3 million employees throughout the world at the end of the fiscal year, up from 2.2 million 12 months prior.