PAL‐XFEL utilizes a three‐chicane bunch compression (3‐BC) scheme (the very first of its kind in operation) for free‐electron laser (FEL) operation. The addition of a third bunch compressor allows for more effective mitigation of coherent synchrotron radiation during bunch compression and an increased flexibility of system configuration. Start‐to‐end simulations of the effects of radiofrequency jitter on the electron beam performance show that using the 3‐BC scheme leads to better performance compared with the two‐chicane bunch compression scheme. Together with the high performance of the linac radiofrequency system, it enables reliable operation of PAL‐XFEL with unprecedented stability in terms of arrival timing, pointing and intensity; an arrival timing jitter of better than 15 fs, a transverse position jitter of smaller than 10% of the photon beam size, and an FEL intensity jitter of smaller than 5% are consistently achieved.