Boston Logan Airport is experiencing flight delays as thunderstorms move across the Northeast on August 25, 2026, with conditions affecting multiple major airports nationwide amid summer travel disruptions.
The FAA reported that thunderstorms could delay or cancel flights at Denver, Fort Lauderdale, Miami, Orlando, and Tampa on Tuesday, according to the agency’s daily air traffic report. Denver International Airport reported the most disruptions, with 46 delays and 7 canceled flights, while thunderstorms also impacted East Coast operations including Boston Logan.

Thunderstorms pose particular challenges to airport operations because even brief periods of lightning force temporary ground stops, preventing aircraft from departing or landing. When storms persist, aircraft divert to alternate airports, refuel, and wait out conditions, causing cascading delays that can extend long after weather improves. United Airlines led U.S. carriers Monday with 95 delays and 12 cancellations across its network, according to FlightAware data.
Weather accounts for over 74 percent of system-impacting aviation delays of greater than 15 minutes, according to the Federal Aviation Administration. Summer thunderstorms represent a recurring challenge for the industry, with the Northeast particularly vulnerable to disruption given the density of major airports and air traffic in the region.

Passengers affected by delays or cancellations are advised to check flight status regularly through their airline’s website or app, enable notifications for gate changes, and rebook as soon as possible if their flight is canceled. The FAA continues to monitor conditions and adjust ground delays as weather develops.
Sources
- NJ.com — reported Denver International Airport had 46 delays and 7 cancellations on August 24-25, 2026; United Airlines led carriers with 95 delays and 12 cancellations
- Federal Aviation Administration (FAA) — daily air traffic report for August 25, 2026, listing thunderstorm impacts at major airports; weather delay statistics showing 74% of system-impacting delays
- FlightAware — real-time flight delay and cancellation tracking data











