Glentoran | CupWinners Cup | Competitions
| Season | 1 | 2 | 1 | 2 | 3 | 4 | 5 | 6 | G | W‑D‑L | GF‑GA | Reached | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1998‑99 | 0‑1 | 1‑2 | 2 | 0‑0‑2 | 1‑3 | Qualifier | |||||||
| 1996‑97 | 1‑2 | 0‑8 | 2 | 0‑0‑2 | 1‑10 | Qualifier | |||||||
| 1990‑91 | 1‑1 | 0‑5 | 2 | 0‑1‑1 | 1‑6 | 1st Round | |||||||
| 1987‑88 | 0‑0 | 1‑1 | 2 | 0‑2‑0 | 1‑1 | 1st Round | |||||||
| 1986‑87 | 1‑1 | 0‑2 | 2 | 0‑1‑1 | 1‑3 | 1st Round | |||||||
| 1985‑86 | 1‑3 | 1‑0 | 2 | 1‑0‑1 | 2‑3 | 1st Round | |||||||
| 1983‑84 | 1‑2 | 1‑2 | 2 | 0‑0‑2 | 2‑4 | 1st Round | |||||||
| 1973‑74 | 2‑2 | 2‑0 | 1‑1 | 3‑1 | 0‑2 | 0‑5 | 6 | 2‑2‑2 | 8‑11 | Quarter‑final | |||
| 1966‑67 | 1‑1 | 0‑4 | 2 | 0‑1‑1 | 1‑5 | 1st Round | |||||||
| Glentoran seasons in Champions League, European Cup, Europa League, UEFA Cup, Inter-Cities Fairs Cup, Conference League. Home games in bold. PDF | |||||||||||||