Ulster will begin their European campaign away to the English side on 16 November with Clermont Avergne their opening opponents in Belfast.
Ulster host Ospreys at Kingspan Stadium on the opening night of the 2019/20 Pro14 season on Friday, 27 September.
Ulster will meet Top 14 runners-up Clermont plus English clubs Harlequins and Bath in their European Champions Cup pool next season.
Conferences re-jigged as organisers "freshen up" Guinness Pro14 championship.
Audio & Video
Former Ulster scrum-half Paul Marshall says the 21-12 derby loss to Connacht was just a "poor night" for the visitors in Galway.
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