Rangers could face Progres rematch, Kilmarnock may take on Partizan
Rangers could face a rematch against Progres Niederkorn if they reach the Europa League second qualifying round.
The Luxembourg side, who beat Rangers in 2017, Cardiff Met Uni or League of Ireland side Cork City will play the winner of Rangers' tie with Prishtina or St Joseph's.
Aberdeen will take on Luxembourg's Fola Esch or Georgia's Chikhura Sachkhere if they overcome Finnish side RoPS.
Kilmarnock will play Serbia's Partizan if they beat Connah's Quay Nomads.
The Scottish teams will be at home for the first leg if they reach the second qualifying round, which will be played over 25 July and 1 August.
The preliminary round ties involving Progres and Cardiff Met Uni, Prishtina of Kosovo and Gibraltar's St Joseph's, and Fola and Chikhura take place over 27 June and 4 July The first qualifying round will be played over 11 and 18 July.
- Nomads boss Morrison relishing Kilmarnock tie
- Rangers take on Prishtina or St Joseph's, Aberdeen face RoPS
Rangers, then managed by Pedro Caixinha, were beaten 2-1 on aggregate by Progres in the first qualifying round two years ago.
The Ibrox side fared better under current boss Steven Gerrard last season, coming through three qualifying rounds and a play-off to take part in the group stage.
Aberdeen and Fola have met in recent times, the Dons triumphing 3-2 on aggregate in their 2016 qualifying tie.
Kilmarnock, who appointed Angelo Alessio as their new manager on Sunday, are returning to European football after an 18-year absence.