Major US Airlines to Stay Grounded All Night as FAA Outage Cancels 3,300 Flights

Major US airlines are expected to remain grounded for the rest of Friday night as the Federal Aviation Administration’s nationwide ground stop surpasses 90 minutes, making it the longest halt since Sept 11, 2001, CNN reported. More than 3,300 US flights have been canceled and 10,200 delayed, according to The Wall Street Journal, with Delta Air Lines canceling all remaining Friday departures out of New York’s LaGuardia Airport and Terminal B closing its gate area. President Donald Trump told Fox News the disruption did not appear linked to a cyberattack or artificial intelligence and instead pointed to outdated systems that he has sought to upgrade.

The FAA ordered the ground stop across all US airports after a telecommunications failure hit all 22 Air Route Traffic Control Centers, knocking out radio frequencies and radar feeds and forcing some pilots to communicate on emergency frequencies. CBS News reported that an update to a private communications network operated by L3Harris Technologies, which connects more than 4,400 FAA sites, caused the system to reboot and crash, sending L3Harris shares down 3.8% to $262 in after hours trading. The FAA told airlines the outage stemmed from a network router problem that began at Chicago Midway International Airport, while the FBI said it did not suspect criminal activity. Homeland Security Secretary Markwayne Mullin said officials have no timeline for restoring normal operations and that “we’re not ruling out anything at this point,” though Air Space Intelligence, developer of the SMART AI routing tool expanded to all 22 centers on Nov 10, and Microsoft both said their systems were not involved.

Quick FAA Restoration

The most likely outcome is that the FAA isolates the communications failure overnight and permits major carriers to resume operations the next morning. Airlines still face aircraft and crew repositioning costs, but the market treats the outage as a contained operational disruption rather than a systemic safety crisis.

Weekend Travel Cascade

A less favorable but plausible path is that the outage is technically repaired but the national airline network remains unstable through the weekend. The market impact is still primarily sector-specific, concentrated in airlines, airports, online travel and passenger-facing travel services.

Consumer Services −2.2% · Industrials −0.2%

Modernization Funding Push

The outage strengthens the political case for the FAA air-traffic-control overhaul already requested by Transportation Secretary Sean Duffy. The immediate trading impact shifts from airlines alone toward contractors and technology providers tied to communications, surveillance and automation systems.

Consumer Services −0.6% · Technology +0.5% · Industrials +0.5%

Security Review Escalates

A low-probability but higher-impact path is that federal officials cannot quickly rule out malicious activity or a critical infrastructure vulnerability. Even without an accident, a security framing would increase uncertainty for airlines and for vendors tied to FAA communications systems.

Consumer Services −1.6% · Technology −0.4%

Major US Airlines to Stay Grounded All Night as FAA Outage Cancels 3,300 Flights

4 ways this could read

Quick FAA Restoration

Weekend Travel Cascade

Modernization Funding Push

Security Review Escalates

4 ways this could read

Quick FAA Restoration

Weekend Travel Cascade

Modernization Funding Push

Security Review Escalates

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