By Richard Horgan Los Angeles (Knewz) — It likely won’t be until 2024 that U.S. business travel is back up to the levels it enjoyed in 2019. The Delta and Omicron variants really put a crimp in the business travel recovery. According to Deloitte, business travel is expected to reach 36 percent of 2019 levels in the second quarter of 2022 and rise to 55 percent of those levels by the end of the year. The recovery will be a little faster for office-dominant companies, with back-to-normal business travel pegged for the end of 2023. In the case of companies where a substantial number of employees …