Bonneville(2008)

When Arvilla Holden promises her husband that she'll cremate him and scatter his ashes, she doesn't expect her promise to be called so soon, or to lead to a high-stakes fight with her stepdaughter Francine, a Santa Barbara socialite determined to give him a proper burial. Convinced that she has no choice but to surrender the ashes to Francine, Arvilla sets off on a journey from Pocatello, Idaho to Santa Barbara. Her friends, life-of-the-party Margene and goody-two-shoes Carol, volunteer to go with her for moral support. Expecting to fly, they're surprised when Arvilla picks them up in her '66 Pontiac Bonneville convertible, and shocked when she cruises serenely past the airport and hijacks them on a reluctant road trip that becomes the ride of their lives.