Firefighters were there when flight 1854 landed at Denver International Airport from Detroit shortly after 8 p.m. Tuesday.
A cellphone name to Delta was not instantly returned Tuesday night time. A small number of passengers were treated and released, the airline said.
One passenger identified as AJ Davidson recounted the chaos that ensued following the plane's landing.
A Delta representative told Business Insider that the smoke resulted from hydraulic fluid dripping on the auxiliary power unit.
Denver International Airport said "minor injuries" were reported after the incident on Twitter Wednesday morning.
A Delta Air Traces flight from Detroit to Denver was evacuated after passengers reported smoke within the cabin.
Passengers posted photos of the evaluation to Twitter.
Pictures on social media showed passengers standing on the plane's wing during the evacuation while a shuttle bus transported them to the airport.
"The safety of Delta's customers and crew is our top priority, and we apologize for the concern this situation has caused", said an airline spokesman. The cabin is darkened and overhead lights can be seen swirling through the smoke.
Jayne Mednick, a passenger said, "The cabin filled with fumes, very, uh, noxious fumes, and of course people were alarmed".
Williams did not know how many people were on board or what kind of plane was involved.