She started her career at a young age via a kids show, 5 and up. She pursued her career years later through the Sprite, Magpakatotoo Ka commercial (Sprite, Get Real) as a kitikitext(text addict). Then GMA Network got her for Click as Mimi. She was cast as Melanie in the soap opera Ikaw Lang ang Mamahalin, replacing Sunshine Dizon as the love interest of Cogie Domingo's character, later pairing with Richard Gutierrez after Domingo left the show. Ortaleza paired with Gutierrez again in the soap opera, Habang Kapiling Ka in the role of Donna. After Habang Kapiling Ka ended, they partnered in Click. They worked together in the Sunday youth drama Love to Love in the episode "Maid For Each Other" where she played Jen, a rich girl from Cebu who ran away to Manila to protest her father's marriage to a cruel woman.
The show got such a high rating that the director requested them for another season, My 1, 2 Love, now with Richard's off-screen partner Anne Curtis. Ortaleza played the role of Nikki, the PA of her cousin. After the second season of Love to Love ended, Chynna and Richard parted ways. After the success of the first season of StarStruck, Ortaleza hosted the Starstruck's Friday live show, Stage 1 Live, with Cogie Domingo and Raymond Gutierrez. Stage 1 Live was cancelled after one season. She was then added to the new youth segment of SOP (Sobrang Okey Pare), titled as SOP Gimikada then changed to SOP Gigsters. She was then cast as host in the second season of 3R with Iza Calzado and Bettina Carlos. She also added to the cast of Joyride, a youth drama show aired every afternoon as Leah someone from the past of Jason (Cogie Domingo). She was also cast in the 7th season of Love to Love in the episode Haunted Love House.
Ortaleza said goodbye to her teenager image and posed sexy for the first issue of Pump Magazine. She was also a part of Metro Magazine and FHM's "100 Sexiest Women in the World." Ortaleza worked one more time with Gutierrez in the Soap Opera Sugo as the sultry vixen, Rebecca.She also joined the MTV VJ Hunt 2005 and became one of the 16 finalists though she did not won the said title, she got the People Choice awards.
For the year 2006 Chynna was on the list again of FHM 100 sexiest women.And she is currently part of latest telefantasya from GMA-7 Atlantika an underwater kingdom as the villain Vera.
Chynna is dating her click co-star Railey Valerosso and was linked to her former screen partner Richard Gutierrez.
- Click - Mimi
- Ikaw Lang ang Mamahalin - Melanie
- Habang Kapiling Ka - Donna
- Joyride - Lea
- Love to Love: Maid For Each Other - Jen
- Love to Love 2: My 1, 2 Love - Nikki
- Love to Love 7: Haunted Love House - Nadia
- Now and Forever: Linlang - Jane
- Atlantika - Vera
- Sugo - Rebecca
- 5 and Up - host
- Click Barkada Hunt - host
- StarStruck Stage 1 Live - host
- SOP Gigsters - host
- 3R - host
- SOP - host