| Quarterfinals | ||||
| 6/1/47 | 1L | Brooklyn Hispano | 1 : 4 | New York Americans |
| 6/15/47 | 2L | Brooklyn Hispano | 5 : 1 (aet) | New York Americans |
| Brooklyn Hispano advance on 6-5 aggregate | ||||
| 6/15/47 | Ponta Delgada | 5 : 3 (aet) | Philadelphia Americans | |
| 5/4/47 | Sparta (Chi.) | 2 : 1 (aet) | Correnti Cleaners (St. L) | |
| 5/11/47 | Pioneer Kickers (Det.) | 2 : 2 (aet) | Curry SC (W. Pa.) | |
| Pioneer Kickers forfeit replay due to pro league commitments | ||||
| Semifinals | ||||
| 6/22/47 | 1L | Ponta Delgada | 9 : 0 | Brooklyn Hispano |
| 6/29/47 | 2L | Brooklyn Hispano | 1 : 2 | Ponta Delgada |
| Ponta Delgada advance on 11-1 aggregate | ||||
| 6/8/47 | 1L | Curry S.C. | 2 : 4 | Sparta |
| 6/15/47 | 2L | Sparta | 4 : 1 | Curry S.C. |
| Sparta advance on 8-3 aggregate | ||||
| Final | ||||
| First Leg – at Fall River, Massachusetts | ||||
| 8/31/47 | Ponta Delgada | 6 : 1 | Sparta | |
| Second Leg – at Sparta Stadium – Chicago, Illinois | ||||
| 9/7/47 | Sparta | 2 : 3 | Ponta Delgada | |
| Ponta Delgada win National Challenge Cup on 9-3 aggregate | ||||
| KEY – w/o – Walkover, R – Replay, 1L – 1st Leg, 2L – 2nd Leg, 3L – 3rd Leg | ||||