| 3. Round | 24/06/2021 | Tacoma Defiance | - | Real Monarchs SLC | 1:1 | ||||
| 3. Round | 27/06/2021 | Real Monarchs SLC | - | San Antonio FC | 1:1 | ||||
| 3. Round | 01/07/2021 | Real Monarchs SLC | - | New Mexico United | 3:2 | ||||
| 4. Round | 05/07/2021 | Colorado Springs Switchbacks | - | Real Monarchs SLC | 3:1 | ||||
| 4. Round | 10/07/2021 | Real Monarchs SLC | - | El Paso Locomotive | 1:3 | ||||
| 4. Round | 19/07/2021 | Austin Bold | - | Real Monarchs SLC | 1:0 | ||||
| 4. Round | 24/07/2021 | Real Monarchs SLC | - | Las Vegas Lights FC | 3:2 |  |
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| 4. Round | 01/08/2021 | El Paso Locomotive | - | Real Monarchs SLC | 3:1 | |
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| 5. Round | 08/08/2021 | San Diego Loyal | - | Real Monarchs SLC | 0:1 | ||||
| 6. Round | 12/09/2021 | Real Monarchs SLC | - | San Antonio FC | 0:1 | ||||
| 6. Round | 16/09/2021 | Hartford Athletic | - | Real Monarchs SLC | 2:0 | ||||
| 6. Round | 19/09/2021 | New Mexico United | - | Real Monarchs SLC | 2:1 | |
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| 6. Round | 27/09/2021 | Real Monarchs SLC | - | New York RB II | 0:0 | ||||
| 7. Round | 03/10/2021 | Rio Grande Valley FC | - | Real Monarchs SLC | 3:0 | ||||
| 7. Round | 16/10/2021 | Real Monarchs SLC | - | Austin Bold | 4:3 | ||||
| 7. Round | 31/10/2021 | New Mexico United | - | Real Monarchs SLC | 3:1 |
USA