An airport is classified as closed only when an official closure notice is found and no flight movement is detected. A website being unreachable is never treated as a closure.
No monitored airport is currently classified as closed. Across all 29 monitored airports, 11 are currently classified as open, 18 as disrupted and 0 as unknown.
Delay and cancellation figures are indications detected on airport flight information, not exact flight counts. Airport status does not describe national airspace or individual flights.