Within each group, the teams would play a double round-robin to decide their league position.
The four group winners and the four runners-up contested a play-off round to decide the two promotion slots.
FC Baden win 3–2 on aggregate and continue to the semi-finals.
FC Raron win 4–2 on aggregate and continue to the semi-finals.
[8] FC Baden win 2–1 on aggregate and are promoted to 1979–80 Nationalliga B. SR Delémont remain in the division.