Dennis C. Flanagan, a devoted family man and dedicated employee, passed away peacefully on March 26, 2026. Born on October 7, 1946, Dennis lived a life marked by commitment, hard work, and love.

Dennis spent much of his professional life with Phillips Petroleum, where he was known as a hardworking and dedicated employee.

Beyond his professional achievements, Dennis was a wonderful provider for his family and treasured the time he shared with his wife, Donna. Their marriage spanned 48 years, a testament to a deep and enduring love. The couple's bond remained strong until Donna’s passing in February 2026, just weeks before Dennis’s own departure. Together, they created a loving home.

Dennis was known for his easy-going nature and tolerant demeanor, qualities that endeared him to many. He was always willing to lend a helpful hand to his children, guiding and supporting them with patience and kindness.

In his leisure time, Dennis found joy in hobbies that reflected his thoughtful and curious nature. He was an avid coin collector, and he also enjoyed garage selling.

Family, work, and his personal interests combined to paint the portrait of a life well-lived.

Dennis is preceded in death by his loving wife Donna Flanagan, his parents, Harold and Norma Flanagan, his brother, Arlen Flanagan, and grandson, Shon Freelen.

He is survived by his children, Daniel Flanagan, Jeffrey Flanagan, and Kathryn Saysoff, as well as many grandchildren, and many great grandchildren

Visitation will be held on April 9, 2026, from 10:00 a.m. to 11:00 a.m. at Terrace Park Funeral Home & Cemetery, located at 801 NW 108th St, Kansas City, Missouri. Following visitation, a funeral service will be conducted at the same location from 11:00 a.m. to 12:00 p.m. The interment will take place at Resurrection Cemetery, 5001 NE Cookingham Dr, Kansas City, Missouri, beginning at 12:30 p.m.