Chaos in Greek airspace as Athens FIR restores systems – Delays to continue for hours – What passengers need to know
Some landings and take-offs are beginning to take place
U.S. airspace could be closed if deemed unsafe due to shutdown, says U.S. Secretary of Transportation
We will not let people travel, we are not there at the moment it's just a matter of significant delays, said Sean Duffy
Belgium: Airspace closed due to technical issue
Air traffic control system "was not functioning properly," according to an official source