| 2. Round | 12/04/2018 | Seattle Sounders 2 | - | Real Monarchs SLC | 1:3 | ||||
| 3. Round | 05/05/2018 | Real Monarchs SLC | - | Orange County SC | 2:1 | ||||
| 3. Round | 10/05/2018 | Real Monarchs SLC | - | Swope Park Rangers | 4:1 | ||||
| 3. Round | 30/05/2018 | Real Monarchs SLC | - | Sacramento Republic | 1:0 | ||||
| 4. Round | 05/06/2018 | Real Monarchs SLC | - | Rio Grande Valley FC | 2:0 |  |
USA
Mexico