DL1439 - Incident: Delta B739 at Boston on Apr 6th 2025

A Delta Airlines Boeing 737-900, registration N811DZ performing flight DL-1439 from Boston,MA to Tampa,FL (USA) with 184 people on board, was climbing through FL200 out of Boston when the crew stopped the climb, donned their oxygen masks and descended the aircraft to 12000 feet advising they had lost cabin pressure. The aircraft returned to Boston for a safe landing on runway 33L about 45 minutes after departure.

The rotation was cancelled.

The aircraft is still on the ground in Boston about 20 hours after landing.