UA7 IAH-NRT 789 diverted to SFO. Flight arrived at NRT 5 hrs 53 mins late.
UA31 MUC-EWR 764 cancelled due to maintenance after a 3 hr delay.
UA135 ZRH-EWR 763 cancelled due to maintenance after a 2 hr 5 min delay.
UA818 EZE-IAH 772 cancelled due to maintenance.
UA845 ORD-GRU 78X cancelled due to an unexpected operational issue after an anticipated 2.5 hour delay. Replacement flight UA3023 is scheduled the same time as delayed UA845 using a 788.