US airspace shut for 4+ hours. Airline stocks felt it in the final minutes of trading.

Friday afternoon the FAA halted every departure nationwide after a communications failure at air traffic control centers. Reuters calls it the longest nationwide shutdown since 9/11: 6,600+ flights canceled and 8,600 delayed (FlightRadar24). Officials blame overloaded legacy switches and routers, with no evidence of a cyberattack.

Market link: the order landed just before the close, and analysts warn schedules could stay disrupted for days.

The move (Fri Nov 13 close, US markets shut for the weekend): $UAL -1.7% to $109.31, $AAL -1.1% to $13.17, Southwest -0.6%, Delta -0.3%, airline ETF JETS -0.7%. After hours United slipped to $107.20 and American to $12.94 (last prints 07:59 ICT Sat).

One-day headline for airlines, or will Monday's open price in the rebooking costs?