The Other Side of Midnight (1977) on Netflix

Beautiful Noelle Page meets dashing WWII American pilot Larry Douglas in France and falls in love. She expects him to marry her, but instead Larry abandons her. In the United States, successful Catherine Alexander meets Larry Douglas and they marry. But Noelle hasn't forgotten Larry even as she's become a successful actress. She maneuvers to have Larry hired as the private pilot of her wealthy and powerful lover Constantin Demiris so she can seek revenge on him, but instead she and Larry rekindled their passion. Desperate to be together, Larry and Noelle make deadly plans. But soon the lovers face a terrible fate determined by the jealous Demiris using Catherine as his pawn.