DALLAS — After a turbulent Thursday marked by widespread delays and elevated cancellation levels at major U.S. airports, operational performance showed signs of recovery Friday, though New York–area airports and Boston continue to face notable disruption, according to the latest Cirium data (as of October 31, 5:09 p.m. ET).

While hubs such as Chicago O’Hare, Atlanta, Denver, Dallas/Fort Worth, and Los Angeles reported below-average cancellation rates (all under 2%) and strong on-time departure performance, the Northeast corridor remained the outlier.

New York + Boston: Still the Weak Spot

• JFK: 5.67% of flights cancelled
• LaGuardia: 5.98% cancelled
• Newark: 2.26% cancelled
• Boston Logan: 7.31% cancelled

Cirium flags a 5% cancellation rate as the threshold for a “poor” operational day — meaning all four airports exceeded or approached that mark. Departure punctuality at JFK and LGA also remains well below the 80% D14 benchmark (flights leaving within 14 minutes of scheduled time).

By contrast, Denver (0.12% cancellations), Seattle (0.21%), San Francisco (0.20%), and Washington Dulles (0.00%) saw near-perfect operational flow.

Context: No Broader System Breakdown Yet‍

Cirium has been tracking U.S. airline performance in relation to the ongoing federal government shutdown. Yesterday (Oct. 30) was the first time the data showed a clear, multi-airport slowdown, with cancellations at LaGuardia spiking to nearly 38% and more than 21% at JFK.

Today’s partial rebound suggests the issue is regional rather than systemic — with weather and ATC staffing constraints in the Northeast likely contributing factors.

Key Takeaway

• The U.S. system is not in full disruption
• But the Northeast remains heavily constrained, with cancellations well above national norms
• Most major hubs are operating at or above target performance levels

Cirium will issue another update at end of day today unless significant operational changes occur.