In the title compound, C(17)H(20)ClFN(2)O(3), the dihedral angle between the pyridazine and benzene rings is 41.37 (10)°. In the crystal, there are no significant intermolecular interactions present. The terminal -CH(2)F group is disordered over two sets of sites with an occupancy ratio of 0.737 (2):0.263 (2).