Boston Logan runway work delayed 1,310 flights this week

Disruption overview

Runway safety work at Boston Logan International Airport left the airport with the highest number of flight delays in the United States this week. Between 4 October 2026 and 6 October 2026, 1,310 flights were delayed, including nearly 530 departures and more than 780 arrivals, and the heaviest disruption hit in the afternoon and evening.

The work affects Runway 9/27, where crews are installing an Engineered Material Arresting System, a safety bed designed to stop overrunning aircraft, and intermittent delays are expected until late November even though conditions eased by 7 October.

Because the disruption is tied to airport construction and federal traffic controls rather than something the airlines caused, compensation is usually unlikely, but carriers should still help during longer delays.

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Disruption details

Boston Logan International Airport saw the highest number of flight delays in the United States this week after runway safety construction squeezed capacity across the airfield. Between 4 October 2026 and 6 October 2026, 1,310 flights were delayed at the airport, covering both arrivals and departures. For passengers, this meant longer waits, moving schedules, and uncertainty at both ends of their journey.

The biggest disruption came on 5 October and 6 October. On those 2 busiest days, more than 25% of departing flights and over 40% of arriving flights ran late. By the morning of 7 October 2026, conditions had eased and only about 20 flights were still behind schedule, but more delay programs are expected while the runway work continues.

The numbers show how widely the disruption spread:

• Nearly 530 departing flights were delayed between 4 October 2026 and 6 October 2026.

• More than 780 arriving flights were delayed over the same period.

• On the 2 busiest days, more than 25% of departures and over 40% of arrivals ran late.

• Afternoon and evening flights were hit hardest because wind patterns increase reliance on Runway 9/27.

The main issue is construction on Runway 9/27, where crews are installing an Engineered Material Arresting System, or EMAS. It's a crushable concrete safety bed that helps stop an aircraft if it overruns the runway. The second phase of the program began in August 2026 and has taken the runway out of regular service, leaving Logan with less flexibility during busy periods.

That reduced capacity matters most later in the day. Afternoon and evening wind patterns make Boston more reliant on Runway 9/27, so that's when delays have been heaviest. The work is scheduled to finish before Thanksgiving, which means travelers could continue to see intermittent holds, later arrivals, and slower departures until late November.

On 7 October 2026, the Federal Aviation Administration also put a 1-hour ground delay program in place for flights heading to Boston. Rather than letting aircraft queue in the air, airlines held planes at their origin airports to manage traffic safely. Some weather also made Tuesday's congestion worse, but runway construction remained the main driver of the delays.

The safety upgrade is especially important at Logan because the airport is bordered on 3 sides by Boston Harbor and has limited room for extra runway overrun protection. Nationwide, EMAS beds have already safely stopped 26 aircraft. That helps explain why the work is considered valuable even though it's disrupting journeys right now.

If you're flying through Boston in the next few weeks, it's worth checking your flight status before you leave for the airport and allowing extra time for changes.

Because these delays stem from airport construction and federal traffic control measures rather than something the airline caused, compensation is usually unlikely.

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