| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Prelude (LP, Album) | CTI Records | CTI 6021 | Canada | 1972 | |
| Prelude (LP) | CTI Records | CTI 6021 | UK | 1972 | |
| Prelude (LP) | CTI Records | CTI 6021 | US | 1972 | |
| Prelude (LP, Album) | CTI Records, CTI Records | CTI 6021, RVG 87678 | US | 1972 | |
| Prelude (LP, Album, Gat) | CTI Records | CTL 10 | UK | 1972 | |
| Prelude (LP, Album, Quad) | CTI Records | CTSQ 6021 | US | 1972 | |
| Prelude (8-Trk, Album, Quad) | CTI Records | CTQ8 6021 | US | 1973 | |
| Prelude (LP, Album, Gat) | CTI Records, CTI Records | CTI 6021, RVG 87678 | Germany | 1973 | |
| Prelude (LP, Album, Gat) | CTI Records | 6489 014 | Australia | 1973 | |
| Prelude (LP, Gat) | Accion | AC - 30.018 | Spain | 1973 | |
| Prelude (LP, Gat) | CTI Records | CTI 6021 | Netherlands | 1974 | |
| Prelude (LP, Gat) | CTI Records | CTI 6021 | Europe | 1974 | |
| Prelude (LP, Album) | Gamma (4) | GX 01-835 | Mexico | 1976 | |
| Prelude (CD) | Legacy | ZK 65129 | US | 1997 | |
| Prelude (CD, Album, RM) | Legacy, CTI Records | 5099750602829, 5060282 | Europe | 2002 | |
| Prelude (CD, Album, RM) | Epic | EPC 450558 2 | Europe |