In February 2016, Sandra joined
Bayer Leverkusen on loan for the rest of the
2015–16 Bundesliga season. She rejoined Þór/KA in May 2016. On 28 September 2017 she won the Icelandic championship with Þór/KA after defeating
FH, in the last game of the season, 2–0 with goals from herself and
Sandra Stephany Mayor. On 4 January 2018 Sandra joined
Slavia Praha on loan until the end of April. She is scheduled to return before the start of the
2018 Úrvalsdeild kvenna season. On 22 September 2018, Sandra was voted as the Úrvalsdeild kvenna Player of the Year. In January 2019, Sandra signed with
Bayer Leverkusen. In January 2022, Sandra signed back with
Þór/KA. On 21 June 2023, she suffered a broken hand in a match against
Tindastóll. In August 2025, Sandra joined
1. FC Köln. In the away game against
SGS Essen, she scored both goals for her team for a 2–1 victory. ==International career==