Linfield and Glentoran are both expected to play the first legs of their European club fixtures at home.
The Blues have requested that their Champions League qualifying opponents HJK travel to Belfast on 14 July and the Finns have agreed in principle.
The Glens have agreed a similar switch for their Uefa Cup match with Allianssi. The first leg is now likely to be played at the Oval on 15 July.
If Uefa approve, the away legs would be on 21 July and 29 July respectively.
