- Scarlets face Racing 92 at home first up
- December home and away double-header against Pro14 rivals Ulster
The Scarlets will begin their Champions Cup pool stage at home, against last season's finalists Racing 92.
They won't be hoping for a rerun of the last time Racing visited Llanelli, where the French side prevailed 29-12.
Leicester Tigers, who the Scarlets have a storied rivalry with in this competition, will be the destination a week later.
The December double-header, which makes or breaks a teams chances of qualification, will be against Pro14 rivals Ulster, before the Tigers visit Llanelli when the competition resumes in January following the Christmas derbies.
The pool stages will then come to a conclusion with a visit to Paris, where Racing have built a fortress in their new stadium, the Paris La Defense Arena, where they are yet to lose.
The Scarlets will be looking to reach the knock-out stages for the second successive season, after reaching the semi-finals in last year's edition of the competition.
All 6 matches will be shown live on BT Sport.
For a preview of the Scarlets' pool stages opponents, click here.
Scarlets Champions Cup fixtures
Round 1: Sat, Oct 13: Scarlets v Racing 92 (Parc y Scarlets, 5.30pm BT Sport)
Round 2: Fri, Oct 19: Leicester v Scarlets (Welford Road, 7.45pm BT Sport)
Round 3: Fri, Dec 7: Scarlets v Ulster (Parc y Scarlets, 7.45pm BT Sport)
Round 4: Fri, Dec 14: Ulster v Scarlets (Kingspan Stadium, 7.45pm BT Sport)
Round 5: Sat, Jan 12: Scarlets v Leicester (Parc y Scarlets, 5.30pm BT Sport)
Round 6: Sat, Jan 19: Racing 92 v Scarlets (Paris La Defense Arena, 3.15pm BT Sport)
To download the full Scarlets' calendar fixture list, click here.
Scarlets reached the semi-finals in last seasons edition of Europe's
premier cup rugby competition
Heineken Champions Cup announce full fixture list for 2018/19 pool stage