Frontier flight from Denver to Detroit diverted to Chicago O'Hare Airport after lavatory leak floods cabin

A Frontier Airlines flight en route from Denver to Detroit diverted to Chicago O’Hare International Airport after a lavatory leak flooded the cabin, according to CBS News. The flight, identified as Frontier flight 3655, departed Denver International Airport shortly after 10:15 a.m. local time and was en route to Detroit Metro Airport when the diversion occurred.

Air traffic control audio cited in the CBS News report indicates that the pilot declared an emergency as the lavatory sink at the front of the aircraft began leaking and the water spread into the main cabin. The crew was instructed to proceed to and land at O’Hare, with the diversion completed without reported injuries.

ABC7 Chicago’s reporting adds that Frontier Airlines was contacted for additional information, but the material provided does not include further details about the aircraft type, exact model, or the number of passengers and crew onboard. The coverage focuses on the administrative side of the incident rather than technical specifications of the aircraft.

ClickOnDetroit | WDIV Local 4 and other outlets in the provided material do not extend the incident with extra operational specifics about the flight, but CBS News and ABC7 Chicago collectively establish the basic sequence: a diversion to Chicago O’Hare following a cabin-flooding lavatory issue, with no injuries reported at the time of landing.

In the broader reporting cluster, other outlets in the supplied material discuss aviation topics unrelated to this Frontier diversion. Markets.BusinessInsider.com describes a separate product launch for a smart carry-on luggage concept and includes an airport-safety moment unrelated to the Frontier incident. Daily Mail and Ekantipur provide context on different, unrelated aviation events (runway disruptions and a Kathmandu hail event, respectively) and do not add detail about the Denver-to-Detroit diversion.

The collection of material also includes reports about changes to Detroit Metro Airport’s passenger pickup policies and curbside operations, noted by ClickOnDetroit | WDIV Local 4 as a separate local development. The coverage describes a shift toward a zero-tolerance policy on parking outside terminal curbsides and the opening of a dedicated cell phone lot to improve traffic flow for arriving passengers, without tying these changes to the Frontier diversion incident itself. The reports specify no dates for when the policy change or the cell phone lot began, and there is no stated linkage to the Denver-Detroit flight event beyond the common mention within the same reporting cluster.

Other items in the supplied material reference global and regional aviation disruptions (Naples Capodichino closure, Buenos Aires Ezeiza runway work, and Kathmandu weather-related disruptions) to illustrate a broader context of aviation operational challenges. However, none of these items provide additional details about the Frontier Airlines incident in Chicago or its outcome, and they do not identify injuries, aircraft specifics, or investigative steps related to the Denver-to-Detroit diversion. No fatalities or injuries are reported in connection with the Frontier incident in the provided material.

The sources indicate that the diversion was completed without injuries, according to CBS News Chicago’s reporting and linked coverage. Frontier Airlines was awaiting additional information from the airline as part of standard post-incident communication, but the material does not include statements from Frontier, airport authorities, or emergency responders detailing the cause beyond the lavatory leak and the resulting cabin flooding.

Overall, the available material confirms a lavatory leak flooding the cabin of a Frontier Airlines flight from Denver to Detroit, which diverted to Chicago O’Hare and landed without reported injuries. The primary details—flight number 3655, departure from Denver shortly after 10:15 a.m., diversion to O’Hare, and no injuries—are documented by CBS News and echoed by ABC7 Chicago through their shared coverage, with subsequent local reporting touching on Detroit’s curbside operations but not providing new incident-specific facts.