The club was formed as
Reichsbahn-Sportverein Flensburg-Weiche in 1908. In 1933, the
Weiche was affected by the rise of the
Nazis to power and came under the control of the
Reichssportführer. By 1940, with the effects of the
Second World War, activities within the club came to a standstill. Despite early efforts after the war in 1945 the club took until April 1947 to reform, now as
ESV Flensburg-Weiche. The football department however left the club in 1949 to form
TSV Weiche-West. From 1962 onwards the two clubs started discussing a merger for the first time. Animosity between the two clubs however prevented progress until 1971, when the two finally agreed on a merger. The football department of ETSV Weiche was formed in 1932 but left the club in 1949 to form the TSV Weiche-West. In 1957 this team won the local Kreisliga and earned promotion to the tier three 2. Amateurliga Schleswig-Holstein Nord.
Weiche-West played in this league until it was renamed to Bezirksliga Schleswig-Holstein Nord in 1968, with a runners-up finish in 1961 as its best result. The club continued in the Bezirksliga after 1968, from 1971 onwards as
ETSV Weiche. Throughout the 26 seasons in the 2. Amateurliga and Bezirksliga the club rarely challenged for the championship but, in 1982–83, it finally won this league and earned promotion to the Landesliga Schleswig-Holstein Nord. In this league, in 1983–84, the club came a distant last and was promptly relegated again. Another decade in the Bezirksliga followed until
Weiche could win the league again in 1994 and return to the Landesliga. Three Landesliga seasons followed in which the club struggled against relegation each year and finally dropped down again in 1997.
Weiche missed out on a place in the new Bezirksoberliga in 1999, a league that replaced the Landesliga above the Bezirksliga but won the later in the following year and was promoted again.
Weiche spend the next seven seasons in the Bezirksoberliga, winning the league in 2006–07 and qualifying for the
Verbandsliga Schleswig-Holstein, the states highest league, for the first time. The 2007–08 season was the last of the Verbandsliga in this format. From 2008 the league was renamed
Schleswig-Holstein-Liga and the four leagues below received the name Verbandsliga.
Weiche did not qualify for the new league and had to stay at Verbandsliga level, being grouped in the
Verbandsliga Schleswig-Holstein-Nord-West. It came second in its Verbandsliga division in 2009 and was promoted to the Schleswig-Holstein-Liga. Three seasons at this level followed before the 2011–12 season saw the club finish runners-up in the Schleswig-Holstein-Liga and being promoted alongside champions
VfR Neumünster. In March 2016 it was announced that the club planned a merger with local rival
Flensburg 08, and in November of that year both clubs agreed that
Flensburg 08 would be merged into ETSV Weiche at the end of June 2017. The club subsequently changed its name into
SC Weiche Flensburg 08. ==Current squad==