| Cup Winners Cup | M. | W | D | L | goals | |||
| at home | 1 | 1 | 0 | 0 | 2 | : | 0 | |
| Away | 1 | 0 | 1 | 0 | 2 | : | 2 | |
| ∑ | 2 | 1 | 1 | 0 | 4 | : | 2 | |
| overall | M. | W | D | L | goals | |||
| at home | 1 | 1 | 0 | 0 | 2 | : | 0 | |
| Away | 1 | 0 | 1 | 0 | 2 | : | 2 | |
| Neutral Place | 0 | 0 | 0 | 0 | 0 | : | 0 | |
| ∑ | 2 | 1 | 1 | 0 | 4 | : | 2 | |
| Cup Winners Cup | |||||
| 1973/1974 | 1. Round | Glentoran FC | - | Chimia Râmnicu-Vâlcea | 2:0 (1:0) |
| 1973/1974 | 1. Round | Chimia Râmnicu-Vâlcea | - | Glentoran FC | 2:2 (2:1) |
|
For games that were decided on penalties the score after 120 minutes will be included in the ranking |
Northern Ireland 
![Glentoran Belfast [Women]](https://s.hs-data.com/bilder/wappen/mini/6024.gif?fallback=png "Glentoran Belfast [Women]"){kind=small}
![Glentoran Belfast [Youth]](https://s.hs-data.com/bilder/wappen/mini/24425.gif?fallback=png "Glentoran Belfast [Youth]"){kind=small}
![Glentoran Belfast [Youth B]](https://s.hs-data.com/bilder/wappen/mini/28689.gif?fallback=png "Glentoran Belfast [Youth B]"){kind=small}
![Glentoran Belfast [Youth C]](https://s.hs-data.com/bilder/wappen/mini/50096.gif?fallback=png "Glentoran Belfast [Youth C]"){kind=small}