| Date | Time |
| Home | Score | Away | Venue | TV/Att |
|
| September 2011 |
| Fri 2 Sep | 19:05 |
| Ospreys | 27 - 3 | Leinster | Liberty Stadium | 5,424 | Report |
| Fri 2 Sep | 19:05 |
| Ulster | 28 - 14 | Warriors | Ravenhill | 6,296 | Report |
| Fri 2 Sep | 19:30 |
| Edinburgh | 15 - 38 | Blues | Murrayfield | 2,431 | Report |
| Sat 3 Sep | 15:00 |
| Treviso | 9 - 11 | Connacht | Stadio di Monigo | 3,100 | Report |
| Sat 3 Sep | 19:45 |
| Munster | 20 - 12 | Dragons | Musgrave Park | 7,252 | Report | Video |
| Sun 4 Sep | 16:00 |
| Scarlets | 32 - 9 | Aironi | Parc y Scarlets | 6,493 | Report | Video |
| Fri 9 Sep | 19:30 |
| Warriors | 12 - 23 | Munster | Firhill Stadium | 2,914 | Report |
| Fri 9 Sep | 19:35 |
| Leinster | 31 - 10 | Dragons | Royal Dublin Society | 14,362 | Report | Video |
| Sat 10 Sep | 15:00 |
| Aironi | 19 - 25 | Ulster | Stadio Zaffanella | 3,000 | Report |
| Sat 10 Sep | 15:15 |
| Connacht | 13 - 11 | Scarlets | Sportsground | 3,408 | Report | Video |
| Sat 10 Sep | 18:30 |
| Ospreys | 26 - 19 | Edinburgh | Liberty Stadium | 5,179 | Report | Video |
| Sun 11 Sep | 15:45 |
| Blues | 33 - 18 | Treviso | Cardiff City Stadium | 4,847 | Report | Video |
| Fri 16 Sep | 19:05 |
| Ulster | 20 - 3 | Blues | Ravenhill | 6,555 | Report | Video |
| Fri 16 Sep | 19:30 |
| Edinburgh | 19 - 14 | Connacht | Murrayfield | 2,364 | Report |
| Sat 17 Sep | 15:00 |
| Treviso | 27 - 32 | Ospreys | Stadio di Monigo | 3,000 | Report |
| Sat 17 Sep | 18:00 |
| Leinster | 19 - 23 | Warriors | Royal Dublin Society | 14,686 | Report | Video |
| Sat 17 Sep | 18:30 |
| Dragons | 23 - 14 | Aironi | Rodney Parade | 4,197 | Report | Video |
| Sat 17 Sep | 19:45 |
| Munster | 35 - 12 | Scarlets | Musgrave Park | 7,648 | Report | Video |
| Fri 23 Sep | 19:05 |
| Blues | 13 - 18 | Munster | Cardiff City Stadium | 5,466 | Report | Video |
| Fri 23 Sep | 19:30 |
| Connacht | 17 - 13 | Dragons | Sportsground | 3,706 | Report |
| Fri 23 Sep | 19:30 |
| Warriors | 13 - 15 | Treviso | Firhill Stadium | 2,864 | Report |
| Sat 24 Sep | 15:00 |
| Aironi | 25 - 19 | Edinburgh | Stadio Zaffanella | 2,500 | Report |
| Sat 24 Sep | 18:30 |
| Scarlets | 10 - 15 | Leinster | Parc y Scarlets | 8,823 | Report |
| Sun 25 Sep | 16:30 |
| Ospreys | 32 - 14 | Ulster | Liberty Stadium | 5,590 | Report |
| Fri 30 Sep | 19:05 |
| Dragons | 22 - 9 | Ulster | Rodney Parade | 4,554 | Report | Video |
| Fri 30 Sep | 19:30 |
| Edinburgh | 29 - 14 | Munster | Murrayfield | 3,467 | Report |
| Fri 30 Sep | 19:30 |
| Ospreys | 26 - 21 | Connacht | Liberty Stadium | 5,726 | Report |
| October 2011 |
| Sat 1 Oct | 15:00 |
| Treviso | 20 - 10 | Scarlets | Stadio di Monigo | 3,200 | Report |
| Sat 1 Oct | 18:00 |
| Leinster | 26 - 7 | Aironi | Royal Dublin Society | 14,920 | Report |
| Sat 1 Oct | 18:30 |
| Blues | 13 - 34 | Warriors | Cardiff City Stadium | 8,198 | Report | Video |
| Fri 7 Oct | 19:05 |
| Scarlets | 33 - 17 | Edinburgh | Parc y Scarlets | 6,188 | Report | Video |
| Fri 7 Oct | 19:05 |
| Ulster | 12 - 23 | Treviso | Ravenhill | 7,372 | Report |
| Fri 7 Oct | 19:30 |
| Warriors | 24 - 19 | Dragons | Firhill Stadium | 2,705 | Report |
| Sat 8 Oct | 15:00 |
| Aironi | 26 - 37 | Blues | Stadio Zaffanella | 3,000 | Report |
| Sat 8 Oct | 17:00 |
| Leinster | 30 - 20 | Connacht | Royal Dublin Society | 15,220 | Report |
| Sat 8 Oct | 19:30 |
| Munster | 13 - 17 | Ospreys | Thomond Park Stadium | 16,599 | Report | Video |
| Fri 28 Oct | 19:05 |
| Warriors | 28 - 17 | Ospreys | Firhill Stadium | 3,443 | Report | Video |
| Fri 28 Oct | 19:35 |
| Edinburgh | 28 - 36 | Leinster | Murrayfield | 3,580 | Report |
| Fri 28 Oct | 20:30 |
| Munster | 18 - 6 | Aironi | Musgrave Park | 8,742 | Report |
| Sat 29 Oct | 15:00 |
| Treviso | 50 - 24 | Dragons | Stadio di Monigo | 4,700 | Report |
| Sat 29 Oct | 15:00 |
| Scarlets | 24 - 17 | Ulster | Parc y Scarlets | 7,075 | Report |
| Sat 29 Oct | 18:00 |
| Connacht | 20 - 26 | Blues | Sportsground | 3,996 | Report | Video |
| November 2011 |
| Fri 4 Nov | 19:05 |
| Dragons | P - P | Blues | Rodney Parade | BBCW | Preview |
| Fri 4 Nov | 20:00 |
| Leinster | 24 - 19 | Munster | AVIVA Stadium | 48,365 | Report |
| Sat 5 Nov | 14:30 |
| Aironi | 6 - 18 | Warriors | Stadio Zaffanella | 2,200 | Report |
| Sat 5 Nov | 15:00 |
| Treviso | 11 - 22 | Edinburgh | Stadio di Monigo | 3,500 | Report |
| Sat 5 Nov | 17:35 |
| Ulster | 22 - 3 | Connacht | Ravenhill | 6,887 | Report |
| Sat 5 Nov | 18:30 |
| Ospreys | 9 - 9 | Scarlets | Liberty Stadium | 12,332 | Report | Video |
| Thu 24 Nov | 19:30 |
| Blues | 38 - 0 | Aironi | Cardiff City Stadium | 4,557 | Report | Video |
| Fri 25 Nov | 19:05 |
| Scarlets | 22 - 12 | Dragons | Parc y Scarlets | 7,950 | Report | Video |
| Fri 25 Nov | 19:35 |
| Warriors | 17 - 9 | Ulster | Firhill Stadium | 3,940 | Report |
| Sat 26 Nov | 15:00 |
| Treviso | 20 - 30 | Leinster | Stadio di Monigo | 4,600 | Report |
| Sat 26 Nov | 18:30 |
| Connacht | 6 - 17 | Ospreys | Sportsground | 4,107 | Report | Video |
| Sat 26 Nov | 20:30 |
| Munster | 34 - 17 | Edinburgh | Thomond Park Stadium | 18,200 | Report |
| December 2011 |
| Fri 2 Dec | 19:05 |
| Ulster | 24 - 17 | Scarlets | Ravenhill | 8,117 | Report |
| Fri 2 Dec | 19:30 |
| Connacht | 13 - 15 | Treviso | Sportsground | 3,614 | Report |
| Fri 2 Dec | 19:30 |
| Edinburgh | 50 - 10 | Aironi | Murrayfield | 4,403 | Report |
| Fri 2 Dec | 20:05 |
| Leinster | 52 - 9 | Blues | Royal Dublin Society | 16,347 | Report |
| Sat 3 Dec | 18:30 |
| Ospreys | 19 - 13 | Munster | Liberty Stadium | 5,783 | Report | Audio |
| Sun 4 Dec | 16:30 |
| Dragons | 14 - 14 | Warriors | Rodney Parade | 5,273 | Report |
| Fri 23 Dec | 19:00 |
| Aironi | 27 - 13 | Treviso | Stadio Zaffanella | 3,326 | Report |
| Fri 23 Dec | 19:35 |
| Blues | 28 - 9 | Dragons | Cardiff City Stadium | 10,660 | Report |
| Mon 26 Dec | 14:05 |
| Scarlets | 22 - 14 | Ospreys | Parc y Scarlets | 14,756 | Report |
| Mon 26 Dec | 17:30 |
| Leinster | 42 - 13 | Ulster | Royal Dublin Society | 18,500 | Report | Video |
| Mon 26 Dec | 17:35 |
| Edinburgh | 23 - 23 | Warriors | Murrayfield | 13,246 | Report |
| Mon 26 Dec | 19:45 |
| Munster | 24 - 9 | Connacht | Thomond Park Stadium | 21,030 | Report |
| Fri 30 Dec | 19:05 |
| Dragons | 6 - 10 | Scarlets | Rodney Parade | 7,571 | Report |
| Fri 30 Dec | 19:05 |
| Ulster | 33 - 17 | Munster | Ravenhill | 11,379 | Report |
| Sat 31 Dec | 15:00 |
| Treviso | 37 - 14 | Aironi | Stadio di Monigo | 4,200 | Report |
| January 2012 |
| Sun 1 Jan | 17:00 |
| Connacht | 13 - 15 | Leinster | Sportsground | 6,582 | Report |
| Sun 1 Jan | 17:35 |
| Warriors | 17 - 12 | Edinburgh | Firhill Stadium | 8,852 | Report |
| Sun 1 Jan | 18:30 |
| Ospreys | 17 - 12 | Blues | Liberty Stadium | 11,186 | Report | Video |
| Fri 6 Jan | 19:05 |
| Dragons | 21 - 20 | Ospreys | Rodney Parade | 6,897 | Report | Video |
| Fri 6 Jan | 19:30 |
| Edinburgh | 20 - 42 | Ulster | Murrayfield | 3,792 | Report |
| Sat 7 Jan | 16:35 |
| Aironi | 20 - 6 | Connacht | Stadio Zaffanella | 2,500 | Report |
| Sat 7 Jan | 18:15 |
| Blues | 19 - 23 | Leinster | Cardiff City Stadium | 9,390 | Report | Video |
| Sat 7 Jan | 18:15 |
| Scarlets | 16 - 14 | Warriors | Parc y Scarlets | 9,869 | Report |
| Sat 7 Jan | 20:15 |
| Munster | 29 - 11 | Treviso | Thomond Park Stadium | 16,816 | Report | Video |
| February 2012 |
| Thu 9 Feb | 19:05 |
| Warriors | v | Scarlets | Firhill Stadium | BBCW/ALBA | More |
| Thu 9 Feb | 19:05 |
| Leinster | v | Treviso | Royal Dublin Society | RTE | More |
| Fri 10 Feb | 19:05 |
| Ulster | v | Dragons | Ravenhill | BBCNI/RTE | More |
| Fri 10 Feb | 19:30 |
| Blues | v | Connacht | Cardiff City Stadium |
| More |
| Fri 10 Feb | 19:35 |
| Edinburgh | v | Ospreys | Murrayfield | BBC ALBA | More |
| Sun 12 Feb | 15:00 |
| Aironi | v | Munster | Stadio Zaffanella | RAI/TG4 | More |
| Fri 17 Feb | 19:05 |
| Blues | v | Ulster | Cardiff City Stadium | BBCW/NI | More |
| Fri 17 Feb | 19:30 |
| Ospreys | v | Aironi | Liberty Stadium |
| More |
| Fri 17 Feb | 19:35 |
| Leinster | v | Scarlets | Royal Dublin Society | TG4 | More |
| Sat 18 Feb | 16:15 |
| Treviso | v | Munster | Stadio di Monigo | RAI | More |
| Sat 18 Feb | 17:30 |
| Connacht | v | Warriors | Sportsground | TG4 | More |
| Sat 18 Feb | 18:30 |
| Dragons | v | Edinburgh | Rodney Parade | S4C | More |
| Thu 23 Feb | 19:35 |
| Scarlets | v | Treviso | Parc y Scarlets | S4C | More |
| Fri 24 Feb | 19:05 |
| Munster | v | Blues | Thomond Park Stadium | RTE | More |
| Fri 24 Feb | 19:05 |
| Ulster | v | Ospreys | Ravenhill | BBCNI | More |
| Fri 24 Feb | 19:30 |
| Connacht | v | Edinburgh | Sportsground |
| More |
| Sat 25 Feb | 18:00 |
| Warriors | v | Leinster | Firhill Stadium | BBC ALBA | More |
| Sun 26 Feb | 16:30 |
| Aironi | v | Dragons | Stadio Zaffanella | RAI | More |
| March 2012 |
| Fri 2 Mar | 19:00 |
| Aironi | v | Leinster | Stadio Zaffanella | RAI | More |
| Fri 2 Mar | 19:05 |
| Ospreys | v | Warriors | Liberty Stadium | BBCW | More |
| Fri 2 Mar | 19:05 |
| Ulster | v | Edinburgh | Ravenhill | BBCNI | More |
| Fri 2 Mar | 19:30 |
| Scarlets | v | Connacht | Parc y Scarlets |
| More |
| Sat 3 Mar | 16:15 |
| Treviso | v | Blues | Stadio di Monigo | RAI | More |
| Sat 3 Mar | 18:30 |
| Dragons | v | Munster | Rodney Parade | S4C | More |
| Fri 23 Mar | 19:05 |
| Leinster | v | Ospreys | Royal Dublin Society | RTE | More |
| Fri 23 Mar | 19:30 |
| Edinburgh | v | Dragons | Murrayfield |
| More |
| Fri 23 Mar | 19:35 |
| Warriors | v | Aironi | Firhill Stadium | BBC ALBA | More |
| Sat 24 Mar | 16:15 |
| Treviso | v | Ulster | Stadio di Monigo | RAI | More |
| Sat 24 Mar | 18:30 |
| Blues | v | Scarlets | Cardiff City Stadium | S4C | More |
| Sat 24 Mar | 19:45 |
| Connacht | v | Munster | Sportsground | TG4 | More |
| Fri 30 Mar | 19:05 |
| Ulster | v | Aironi | Ravenhill | BBCNI | More |
| Fri 30 Mar | 19:15 |
| Dragons | v | Connacht | Rodney Parade |
| More |
| Fri 30 Mar | 19:30 |
| Warriors | v | Blues | Firhill Stadium |
| More |
| Fri 30 Mar | 19:35 |
| Edinburgh | v | Scarlets | Murrayfield | BBC ALBA | More |
| Sat 31 Mar | 18:30 |
| Ospreys | v | Treviso | Liberty Stadium | S4C | More |
| Sat 31 Mar | 19:30 |
| Munster | v | Leinster | Thomond Park Stadium | RTE | More |
| April 2012 |
| 13/14/15 Apr |
|
| Aironi | v | Scarlets | Stadio Zaffanella |
| More |
| 13/14/15 Apr |
|
| Blues | v | Ospreys | Cardiff City Stadium |
| More |
| 13/14/15 Apr |
|
| Connacht | v | Ulster | Sportsground |
| More |
| 13/14/15 Apr |
|
| Leinster | v | Edinburgh | Royal Dublin Society |
| More |
| 13/14/15 Apr |
|
| Munster | v | Warriors | Musgrave Park |
| More |
| 13/14/15 Apr |
|
| Dragons | v | Treviso | Rodney Parade |
| More |
| 20/21/22 Apr |
|
| Treviso | v | Warriors | Stadio di Monigo |
| More |
| 20/21/22 Apr |
|
| Blues | v | Edinburgh | Cardiff City Stadium |
| More |
| 20/21/22 Apr |
|
| Connacht | v | Aironi | Sportsground |
| More |
| 20/21/22 Apr |
|
| Ospreys | v | Dragons | Liberty Stadium |
| More |
| 20/21/22 Apr |
|
| Scarlets | v | Munster | Parc y Scarlets |
| More |
| 20/21/22 Apr |
|
| Ulster | v | Leinster | Ravenhill |
| More |
| May 2012 |
| Sat 5 May | 18:30 |
| Edinburgh | v | Treviso | Murrayfield |
| More |
| Sat 5 May | 18:30 |
| Warriors | v | Connacht | Firhill Stadium |
| More |
| Sat 5 May | 18:30 |
| Munster | v | Ulster | Thomond Park Stadium |
| More |
| Sat 5 May | 18:30 |
| Dragons | v | Leinster | Rodney Parade |
| More |
| Sat 5 May | 18:30 |
| Scarlets | v | Blues | Parc y Scarlets |
| More |
| Sat 5 May | 19:30 |
| Aironi | v | Ospreys | Stadio Zaffanella |
| More |
| 26/27 May |
| F |
| v |
| TBA |
|
|
|