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| 1st(1st leg) | Lokomotiv Plovdiv | - | Slavia Sofia | 3:1 (1:1) | ||
| 2nd (2nd leg) | Slavia Sofia | - | Lokomotiv Plovdiv | 0:3 (0:1) | ||
| 1st(1st leg): 04/05/2018 15:30 | 2nd (2nd leg): 13/05/2018 17:00 | Winner: Lokomotiv Plovdiv | ||||
| 1st(1st leg) | Cherno More Varna | - | Septemvri Sofia | 2:1 (1:0) | ||
| 2nd (2nd leg) | Septemvri Sofia | - | Cherno More Varna | 1:2 (0:2) | ||
| 1st(1st leg): 05/05/2018 15:00 | 2nd (2nd leg): 11/05/2018 15:30 | Winner: Cherno More Varna | ||||
