Angel's Flight was filmed in and around the aging Bunker Hill neighborhood of downtown Los Angeles in the summer of 1962, according to notes by Bob Martin, who shot still photographs for the production, and dates written on clapper boards visible in those photos. A prominent landmark in the film is Angels Flight, a 1901 funicular, or incline railway, from which "Liz" jumps to her death. The Los Angeles Police Department reportedly shut down production at one point because the crew was shooting without permits.
       Writer Deane Romano, whose first name in credits was spelled Dean, told AFI Catalog that he found the negative for Angel's Flight at a Hollywood film laboratory in the 1980s and rescued it. The ending was gone, so he duplicated the opening credits and added them to the end. A digitized version of the film was shown at a Los Angeles film noir festival at Hollywood's Egyptian Theater in 2005, and KCET, Los Angeles' Public Television affiliate, aired it as part of its coverage of the reopening of Angels Flight at a new location, a half-block south of its original site. A positive film copy may not exist, and following Romano's death in 2011, the whereabouts of the negative is uncertain. However, the film is mostly extant and available.
       There is some doubt whether the picture was theatrically released in the 1960s. A re-edited version with a newly filmed wrap-around story may have played at Midwestern drive-ins under the name Shock Hill and distributed by Crown International.
       Over the years, the funicular's name has been spelled Angel's Flight and, more recently, Angels Flight. Romano explained that he gave the title an apostrophe because the story is about "an angel in flight."
       The club where "Liz" performed her dance act was The Other Ball, located at 825 East Valley Boulevard in San Gabriel, northeast of Los Angeles. It was the sister club of The Odd Ball in Santa Monica, CA. 
       Director of photography Glen Gano's career went back to the silent film era.
       Angel's Flight is prized for its location coverage of Los Angeles' Bunker Hill neighborhood, which was slowly being razed when filming took place, according to Jim Dawson’s landmark Los Angeles’s Bunker Hill: Pulp Fiction’s Mean Streets and Film Noir’s Ground Zero (2012). By 1969, the last remnants of the hill, including Angels Flight, were hauled away. During the 1920s, and again from the late 1940s into the 1960s, Bunker Hill was used as a location in well over a hundred films. See also M (1950), Chicago Calling (1952), The Turning Point (1952, and The Exiles (1961).