2021 U.S.-Booked Air Volume: $15.3 million
Primary Air Suppliers: American, Delta, United 
Primary Hotel Suppliers: Courtyard, Hampton Inn, Hilton, Hyatt, Marriott
Primary U.S. Online Booking Tool: Concur
Primary U.S. Payment Supplier: Concur
Payment Provider: U.S. Bank
Primary Global Expense Supplier: Concur
Primary Global Travel Risk Management Supplier: ISOS
Consolidated U.S. TMC: Travel Leaders Group

BTN estimates science and engineering firm Leidos reduced its U.S.-booked air volume by about $3 million year over year to $15.3 million in 2021.

Leidos has been measuring emission levels related to travel since 2017, and it reported 187.3 metric tons of carbon emissions related to business travel in 2021. Overall business travel and general commuting emissions last year were down 70 percent compared with a 2019 baseline. Even as business travel in general recovers, the company has set a target of keeping those emissions levels below 40 percent of that baseline by 2025.

Revenues for Leidos increased 12 percent year over year to $1.4 billion. During 2021, Leidos completed acquisitions of naval architecture and marine engineering firm Gibbs & Cox and IT service company 1901 Group.
The company reported a workforce of 43,000 full- and part-time employees as of the end of 2021, an increase of 4,000 year over year.