Formation flight of spacecraft in eccentric orbits is considered in this paper. Symmetry of the eccentric orbits is assumed in a relative formation orbit, and under this assumption, relations of initial conditions in formation flight are derived. Some characteristic orbits are obtained from these relations, such as an orbit where a deputy spacecraft rotates around a chief spacecraft with relatively small variation in the distance between the two spacecraft, or an orbit where the deputy spacecraft moves on a local horizontal plane on which the chief spacecraft exists. Formation flight by plural spacecraft is possible by combining these relative orbits.