The first half of the line was opened by the French company Brig-Furka-Disentis Bahn (BFD) in 1914. Trains could go as far as Gletsch, starting from Brig. Construction of the second part over the Furka Pass and Oberalp Pass was well under way when the war situation in France halted all works by 1915. The company lingered on, but was finally bankrupt in 1923. Two years later the railway had a new owner, called Furka Oberalp Bahn, founded by the cantons and the neighbouring railway companies. Construction work resumed, now with important federal funds, and on July 4, 1926 regular through services between Brig and Disentis could start. RhB trains reached Disentis under electric traction in 1922.