diff --git a/addons/website_event_exhibitor/models/event_sponsor.py b/addons/website_event_exhibitor/models/event_sponsor.py
index 91af79d7edd..7b6a699014c 100644
--- a/addons/website_event_exhibitor/models/event_sponsor.py
+++ b/addons/website_event_exhibitor/models/event_sponsor.py
@@ -224,6 +224,12 @@ class Sponsor(models.Model):
     def get_backend_menu_id(self):
         return self.env.ref('event.event_main_menu').id
 
+    def open_website_url(self):
+        """ Overridden to use a relative URL instead of an absolute when website_id is False. """
+        if self.event_id.website_id:
+            return super().open_website_url()
+        return self.env['website'].get_client_action(f'/event/{slug(self.event_id)}/exhibitor/{slug(self)}')
+
     # ------------------------------------------------------------
     # MESSAGING
     # ------------------------------------------------------------
diff --git a/addons/website_event_meet/models/event_meeting_room.py b/addons/website_event_meet/models/event_meeting_room.py
index b8e17ed8f39..6a08d209311 100644
--- a/addons/website_event_meet/models/event_meeting_room.py
+++ b/addons/website_event_meet/models/event_meeting_room.py
@@ -52,3 +52,9 @@ class EventMeetingRoom(models.Model):
             ("room_participant_count", "=", 0),
             ("room_last_activity", "<", fields.Datetime.now() - self._DELAY_CLEAN),
         ]).active = False
+
+    def open_website_url(self):
+        """ Overridden to use a relative URL instead of an absolute when website_id is False. """
+        if self.event_id.website_id:
+            return super().open_website_url()
+        return self.env['website'].get_client_action(f'/event/{slug(self.event_id)}/meeting_room/{slug(self)}')
diff --git a/addons/website_slides/models/slide_channel.py b/addons/website_slides/models/slide_channel.py
index 3500f4165c1..c1872242076 100644
--- a/addons/website_slides/models/slide_channel.py
+++ b/addons/website_slides/models/slide_channel.py
@@ -1272,3 +1272,9 @@ class Channel(models.Model):
         if field in image_fields:
             return self.website_default_background_image_url
         return super()._get_placeholder_filename(field)
+
+    def open_website_url(self):
+        """ Overridden to use a relative URL instead of an absolute when website_id is False. """
+        if self.website_id:
+            return super().open_website_url()
+        return self.env['website'].get_client_action(f'/slides/{slug(self)}')
diff --git a/addons/website_slides/models/slide_slide.py b/addons/website_slides/models/slide_slide.py
index 1a81ff84a18..6e24bbfcf59 100644
--- a/addons/website_slides/models/slide_slide.py
+++ b/addons/website_slides/models/slide_slide.py
@@ -1402,3 +1402,9 @@ class Slide(models.Model):
             data['course'] = _('Course: %s', slide.channel_id.name)
             data['course_url'] = slide.channel_id.website_url
         return results_data
+
+    def open_website_url(self):
+        """ Overridden to use a relative URL instead of an absolute when website_id is False. """
+        if self.website_id:
+            return super().open_website_url()
+        return self.env['website'].get_client_action(f'/slides/slide/{slug(self)}')