Deligöz joined the Greens as a student member and belonged to the Bavaria chapter of the Greens' youth organization. She entered the Bundestag in 1998, and was re-elected in 2002, 2005 and 2009. Deligöz was re-elected for the fourth time into the federal parliament following the 2013 election. She is one of the eleven politicians of Turkish descent who won a seat in the federal parliament, including seven women.