The 2019 GT Series Endurance Cup (known for sponsorship reasons as the 2019 Blancpain GT Series Endurance Cup) was the ninth season of the GT Series Endurance Cup. The season began on 14 April at Monza and ended on 29 September in Barcelona. The season featured five rounds, with each race lasting for a duration of three hours besides the 24 Hours of Spa and the 1000 km Paul Ricard events.