In the summer of 1990 the Wellamo briefly served on the Helsinki–Stockholm route, because the new Silja Serenade was not yet complete, but old MS Finlandia had to be delivered to her new owners DFDS.
I sommeren 1990 blev MS Wellamo overflyttet til ruten Helsinki-Stockholm, fordi det nye Silja Serenade endnu ikke var færdigt, og fordi MS Finlandia, der tidligere have sejlet på ruten, var solgt til DFDS.