Gatwick Airport was forced to temporarily shut its runway four times because of staff sickness, causing flights to be diverted and delays.
Only one air traffic controller out of a scheduled three was at work in the control tower at the time.
The runway was closed to enable the controller to take mandatory breaks on shift through Sunday and Monday.
Two inbound flights were diverted and several were delayed on Sunday morning and four were delayed on Monday.
The air traffic controller took the two one-hour breaks per shift to coincide with when there were no scheduled departures.
Some passengers took to social media to vent their frustration.
@Gatwick_Airport once again another Monday another delay at least you aren’t blaming non-existent weather. Todaynitnis non-existent staff....amazing, well done.— Larry Tampkins (@Ltampkins) April 9, 2018
A spokesman for Gatwick Airport said the staffing issue had been resolved.
"We worked closely with air traffic controllers and airlines to minimise the impact to passengers. We apologise for the inconvenience caused."