In 2004, Fortino played minor ice hockey with the Hamilton Reps in the boys OHF Bantam AA and she won a silver medal at the Ontario provincials, with honourable mention going to her AA defence partner Kyle Rooney.
The following year, Fortino won a gold medal with Stoney Creek at the Ontario Women's Hockey Association (OWHA) provincials and at the 2008 Provincial WHL championship. In 2007–08, Fortino led Provincial WHL defencemen in scoring. She won a gold medal with Ontario Red at the 2008 National Women’s Under-18 Championships in Napanee, Ontario.
In 2009, Fortino won a silver medal with Stoney Creek at the OWHA provincials. Fortino ranked second among PWHL defencemen in scoring in 2008–09, with 7 goals and 17 assists for 24 points in 29 games.
College
Fortino joined the Cornell Big Red women's ice hockey program in 2009 and she earned All-America honours as a freshman. She led all NCAA defencemen, Cornell defencemen, and Cornell freshmen in scoring in the 2009–10 season. As a member of the Big Red, she played in the NCAA championship game at the Frozen Four in 2010.
On October 3, 2011, she was named to the Team Canada roster that participated in the 2011 4 Nations Cup.[3]
Named to 2014 Olympic roster for Canada.[4][5] In August 2008, Fortino was a member of Canada's National Women's Under-18 Team for a three-game series against the United States in Lake Placid. Later that year, she would win a silver medal with Canada's National Women’s Under-18 Team at the 2008 IIHF World Women’s Under-18 Championship in Calgary.
The following year, she participated with Canada's National Women's Under-22 Team for a three-game exhibition versus the United States in Calgary. At the 2009 IIHF World Women's Under 18 championships, Fortino won a silver medal in Füssen, Germany. She was part of another three game exhibition series with the Under 22 team vs. the United States in August 2010. Fortino won a gold medal with Canada's National Women's Under-22 Team at the 2010 MLP Cup in Ravensburg, Germany. In the semifinal of the 2011 MLP Cup, Fortino scored a goal in a 9–0 rout of Russia to advance to the gold medal game.[6] Fortino would score another goal as Canada beat Sweden in the final by a 6–0 tally to claim the gold medal.[7] In March 2011, she was invited to the Canadian national women's ice hockey team selection camp to determine the final roster for the 2011 IIHF Women's World Championships.[8] In a March 31, 2012 exhibition game versus the United States, Laura Fortino scored her first international goal in a 1–0 win at the Ottawa Civic Centre.[9] She scored at 17:26 of the second period and was assisted by Marie-Philip Poulin, as she scored on American goaltender Molly Schaus. Fortino was credited for an assist feeding the puck to teammate, Marie-Philip Poulin when she scored the winning goal in Sochi against the United States.
Canadian Women's Hockey League (CWHL)
On August 19, 2014, Fortino was chosen first overall in the 2014 CWHL Draft by the Brampton Thunder.[10] She was the second alumna of the Stoney Creek Junior Sabres (PWHL) to be selected first overall.