Southwest Airlines plane. RELATED: United Airlines to require U.S. employees to be vaccinated "Nearly 75% of our employees have been vaccinated and the rate continues to climb," Delta told FOX TV Stations.
Southwest also continues to "strongly encourage" their employees to get the COVID-19 vaccine but will not be mandating them, nor has the company made public whether or not it will offer incentives.
Meanwhile, United Airlines announced on Aug. 6 it will be requiring all employees to get the COVID-19 vaccine before Oct. 25.
United officials called their decision a matter of safety and cited "incredibly compelling" evidence of the effectiveness of the vaccines. RELATED: Fully vaccinated US, EU visitors can visit England without quarantining .