Here's some examples I know:
New York, NY
WNYW 5 (Indie to FOX 1987)
WWOR 9 (Indie to UPN 1995, UPN to MNT 2006**)
**WNYW and WWOR both owned by FOX.
Los Angeles, CA
KTLA 5 (Indie to WB 1995, WB to The CW 2006)
KTTV 11 (CBS until 1951 and became Indie until became FOX in 1987)
KCOP 13 (Indie to UPN 1995, UPN to MNT 2006**)
KCAL 28 (PBS to plain ole Indie Educational Station 2011)
**Same story as WNYW/WWOR.
Chicago, IL
WCIU 26 (Indie to Spanish Language until reverted back to indie in 1994)
WFLD 32 (Indie to FOX 1987)
WPWR 50 (Indie to PTEN 1993, PTEN to UPN 1995, UPN to MNT 2006**)
**Owned by FOX.
Philadelphia, PA
KYW 3 (NBC to CBS 1995)
WCAU 10 (CBS to NBC 1995)
San Francisco, CA
KRON 4 (NBC to Indie 2002, Indie to MNT 2006)
KNTV 11* (Indie to NBC 2002)
*It was in the Monterey, CA DMA until 2000.
Boston, MA
WBZ 4 (NBC to CBS 1995)
WHDH 7 (CBS to NBC 1995)
WSBK 38 (Indie to UPN 1995, UPN to Indie 2006, Indie to MNT 2011***)
***Owned by CBS.
Dallas, TX
KDFW 4 (CBS to FOX 1995)
KTVT 11 (Indie to CBS 1995)
KTXA 21 (PTEN to UPN 1995, UPN to plain ole Indie 2006***)
KDFI 27 (Indie to MNT 2006**)
**Owned by FOX.
KDAF 33 (FOX to The WB 1995, The WB to The CW 2006)
***Owned by CBS.
Atlanta, GA
WSB 2 (NBC to ABC 1980)
WAGA 5 (CBS to FOX 1994)
WXIA 11 (ABC to NBC 1980)
WATL 36 (FOX to WB 1995, WB to MNT 2006)
WUPA 69 (UPN to The CW 2006)
Washington, DC
WTTG 5 (DuMont to Indie 1956, Indie to FOX 1987)
WDCA 20 (Indie to UPN 1995, UPN to MNT 2006**)
**Owned by FOX.
Seattle, WA
KIRO 7 (CBS to UPN 1995, UPN to CBS 1997)
KSTW 11 (Indie to PTEN 1993, PTEN to CBS 1995, CBS to UPN 1997, UPN to CW 2006***)
***Owned by CBS.
Miami, FL
WTVJ 4 (CBS to NBC 1989, moved to 6 in the mid-1990s)
WCIX 6 (FOX to CBS 1989, moved to 4 in the mid-1990s)
WSVN 7 (NBC to FOX 1989)
WBFS 33 (Indie to UPN 1995, UPN to MNT 2006***)
***Owned by CBS.
Jacksonville, FL
WJXT 4 (CBS to plain ole Indie 2002)
WTLV 12 (NBC to ABC 1980, ABC to NBC 1988)
WTEV 47 (UPN to CBS 2002)
San Diego, CA
XETV 6 (Indie to ABC 1956, ABC to Indie 1972, Indie to FOX 1987, FOX to CW 2008)
KSWB 69 (WB to The CW 2006, The CW to FOX 2008)
Charlotte, NC
WSOC 9 (NBC to ABC 1978)
WCCB 18 (ABC to Indie 1978, Indie to FOX 1987)
WJZY 46 (Indie to UPN 1995, UPN to The CW 2006)
Baltimore, MD
WMAR 2 (CBS to NBC from 1981, NBC to ABC 1995)
Memphis, TN
WHBQ 13 (ABC to FOX 1995)
WPTY 24 (FOX to ABC 1995)
New Orleans, LA
WVUE 8 (ABC to FOX 1996)
WGNO 26 (Indie to The WB 1995, The WB to ABC 1996)
WNOL 38 (Indie to FOX 1987, FOX to The WB 1996, The WB to The CW 2006)
WUPL 54 (UPN to MNT 2006 also the same station that broadcasts CBS' This Morning which CBS station WWL refused to air, just like Mormon-Owned NBC station in Utah KSL 5 refused to air SNL, seen instead on KUCW 30)
Honolulu, HI
KHON 2 (NBC to FOX 1996)
KHNL 13 (Indie to FOX 1987, FOX to NBC 1995)
One note, Honolulu's CW station isn't CW Plus, and unfortunately not in HD unlike non-CW Plus stations.
Savannah, GA
WSAV 3 (NBC to ABC 1982, ABC to NBC 1986)
WJCL 22 (ABC to NBC 1982, NBC to ABC 1986)
WTGS 28 (Indie to FOX 1987)
WGSA 34 (UPN to The CW 2006)
Charleston, SC
WCBD 2 (ABC to NBC 1996)
WCIV 4 (NBC to ABC 1996)
WTAT 24 (Indie to FOX 1987)
WMMP 36 (UPN to MNT 2006)
Does anybody have any others?
New York, NY
WNYW 5 (Indie to FOX 1987)
WWOR 9 (Indie to UPN 1995, UPN to MNT 2006**)
**WNYW and WWOR both owned by FOX.
Los Angeles, CA
KTLA 5 (Indie to WB 1995, WB to The CW 2006)
KTTV 11 (CBS until 1951 and became Indie until became FOX in 1987)
KCOP 13 (Indie to UPN 1995, UPN to MNT 2006**)
KCAL 28 (PBS to plain ole Indie Educational Station 2011)
**Same story as WNYW/WWOR.
Chicago, IL
WCIU 26 (Indie to Spanish Language until reverted back to indie in 1994)
WFLD 32 (Indie to FOX 1987)
WPWR 50 (Indie to PTEN 1993, PTEN to UPN 1995, UPN to MNT 2006**)
**Owned by FOX.
Philadelphia, PA
KYW 3 (NBC to CBS 1995)
WCAU 10 (CBS to NBC 1995)
San Francisco, CA
KRON 4 (NBC to Indie 2002, Indie to MNT 2006)
KNTV 11* (Indie to NBC 2002)
*It was in the Monterey, CA DMA until 2000.
Boston, MA
WBZ 4 (NBC to CBS 1995)
WHDH 7 (CBS to NBC 1995)
WSBK 38 (Indie to UPN 1995, UPN to Indie 2006, Indie to MNT 2011***)
***Owned by CBS.
Dallas, TX
KDFW 4 (CBS to FOX 1995)
KTVT 11 (Indie to CBS 1995)
KTXA 21 (PTEN to UPN 1995, UPN to plain ole Indie 2006***)
KDFI 27 (Indie to MNT 2006**)
**Owned by FOX.
KDAF 33 (FOX to The WB 1995, The WB to The CW 2006)
***Owned by CBS.
Atlanta, GA
WSB 2 (NBC to ABC 1980)
WAGA 5 (CBS to FOX 1994)
WXIA 11 (ABC to NBC 1980)
WATL 36 (FOX to WB 1995, WB to MNT 2006)
WUPA 69 (UPN to The CW 2006)
Washington, DC
WTTG 5 (DuMont to Indie 1956, Indie to FOX 1987)
WDCA 20 (Indie to UPN 1995, UPN to MNT 2006**)
**Owned by FOX.
Seattle, WA
KIRO 7 (CBS to UPN 1995, UPN to CBS 1997)
KSTW 11 (Indie to PTEN 1993, PTEN to CBS 1995, CBS to UPN 1997, UPN to CW 2006***)
***Owned by CBS.
Miami, FL
WTVJ 4 (CBS to NBC 1989, moved to 6 in the mid-1990s)
WCIX 6 (FOX to CBS 1989, moved to 4 in the mid-1990s)
WSVN 7 (NBC to FOX 1989)
WBFS 33 (Indie to UPN 1995, UPN to MNT 2006***)
***Owned by CBS.
Jacksonville, FL
WJXT 4 (CBS to plain ole Indie 2002)
WTLV 12 (NBC to ABC 1980, ABC to NBC 1988)
WTEV 47 (UPN to CBS 2002)
San Diego, CA
XETV 6 (Indie to ABC 1956, ABC to Indie 1972, Indie to FOX 1987, FOX to CW 2008)
KSWB 69 (WB to The CW 2006, The CW to FOX 2008)
Charlotte, NC
WSOC 9 (NBC to ABC 1978)
WCCB 18 (ABC to Indie 1978, Indie to FOX 1987)
WJZY 46 (Indie to UPN 1995, UPN to The CW 2006)
Baltimore, MD
WMAR 2 (CBS to NBC from 1981, NBC to ABC 1995)
Memphis, TN
WHBQ 13 (ABC to FOX 1995)
WPTY 24 (FOX to ABC 1995)
New Orleans, LA
WVUE 8 (ABC to FOX 1996)
WGNO 26 (Indie to The WB 1995, The WB to ABC 1996)
WNOL 38 (Indie to FOX 1987, FOX to The WB 1996, The WB to The CW 2006)
WUPL 54 (UPN to MNT 2006 also the same station that broadcasts CBS' This Morning which CBS station WWL refused to air, just like Mormon-Owned NBC station in Utah KSL 5 refused to air SNL, seen instead on KUCW 30)
Honolulu, HI
KHON 2 (NBC to FOX 1996)
KHNL 13 (Indie to FOX 1987, FOX to NBC 1995)
One note, Honolulu's CW station isn't CW Plus, and unfortunately not in HD unlike non-CW Plus stations.
Savannah, GA
WSAV 3 (NBC to ABC 1982, ABC to NBC 1986)
WJCL 22 (ABC to NBC 1982, NBC to ABC 1986)
WTGS 28 (Indie to FOX 1987)
WGSA 34 (UPN to The CW 2006)
Charleston, SC
WCBD 2 (ABC to NBC 1996)
WCIV 4 (NBC to ABC 1996)
WTAT 24 (Indie to FOX 1987)
WMMP 36 (UPN to MNT 2006)
Does anybody have any others?