Originally signed on the air on April 19, 1948 as KDYL-TV; it was originally owned by the Mountain Broadcasting Corporation (operated by Sid Fox), along with KDYL radio (1320 AM, now KNIT, and 98.7 FM, now KBEE).
Its call letters later changed to KCPX-TV in 1959, following its sale to Screen Gems Broadcasting (a division of Screen Gems, then the television division of Columbia Pictures). In 1960, channel 4 swapped affiliations with then-ABC affiliate KUTV (channel 2).
This logo was also used by WAPA-TV in San Juan at the time.
The station adopted its present-day KTVX call letters in October 1975 (which were previously used by fellow ABC affiliate KTUL-TV in Tulsa, Oklahoma from 1954 to 1957), when United Television, then the broadcasting division of 20th Century Fox, acquired the station. In 1981, United Television merged with Chris-Craft Industries.
"That Special Feeling! on Channel 4"
"You'll Love It on Channel 4!" ID #2 (1985–1986)
"You Belong Together, Together on Channel 4!" (1986-1987)
The square became a map of Utah; this motif has been used by the station's subsequent logos since. Chris-Craft's television stations were sold to Fox Television Stations (a subsidiary of News Corporation) on August 12, 2000, which was finalized July 31, 2001. KTVX and KMOL (now WOAI-TV) in San Antonio were subsequently traded to Clear Channel Communications (now iHeartMedia) in exchange for WFTC (UHF channel 29) in Minneapolis. Since Fox already owned KSTU (channel 13), it was forced to sell KTVX due to Federal Communications Commission (FCC) regulations prohibiting one company from owning two of the four highest-rated stations in a single market, as well as the fact that the station was in the middle of a long-term affiliation contract with ABC.
KTVX weather logo, 2012–2013
On November 16, 2006, Clear Channel announced plans to sell all of its television stations, including KTVX, after being bought by private equity firms. On April 20, 2007, Clear Channel sold its television station group to Providence Equity Partners's Newport Television. That company closed on the station group on March 14, 2008, and on July 19, 2012, Newport Television sold 22 of its 27 stations to the Nexstar Broadcasting Group, Sinclair Broadcast Group and Cox Media Group. KTVX and KUCW were among the twelve that would be sold to Nexstar, which acquired both stations outright. The JSA and SSA between KTVX and KUCW was terminated upon the completion of the sale, which occurred on December 3, as both stations officially became co-owned for the first time since Clear Channel sold the pair back in 2008. The purchases of KTVX and KUCW would also mark a re-entry into Utah for Nexstar, which had managed CBS affiliate KUTV and MyNetworkTV/This TV affiliate KMYU (VHF channel 12) under a group-wide agreement with the Four Points Media Group before that company's stations were sold to Sinclair at the beginning of 2012.
KTVX weather logo, 2013–
As of 2014, it still used ABC's 2007 logo (though the 2013 logo is used in some occasions).
1Nexstar operates these stations owned by Mission Broadcasting. 2Nexstar operates this station owned by Cunningham Broadcasting. 3Nexstar operates this station owned by White Knight Broadcasting through an SSA. 4Nexstar operates this station owned by Vaughan Media. 5Predecessor company of LIN Media. 6Currently a repeater for WWLP. 7Joint venture with Warner Bros. Discovery in which Nexstar owns 31% while Warner Bros. Discovery owns the remaining 69%.