Midway Airport air traffic control tower reopens after workers test positive for COVID-19

CHICAGO (WLS) -- The air traffic control tower at Midway Airport has re-opened.

It has been closed for six days after three technicians tested positive for COVID-19 last week.

RELATED: Midway Control Tower workers test positive for coronavirus; hundreds of flights canceled at airport

Flight operations were limited during the closure and the Federal Aviation Administration said they put a ground delay program in place allowing flights to operate on a "one-in-one-out" basis.

The FAA said the tower has been thoroughly cleaned and other workers are still being evaluated.

RELATED: Southwest reduces service to and from Midway

Southwest Airlines, which has the most flights into and out of Midway, had greatly reduced its schedule while the tower was closed.