UA33 NRT-LAX 789 cancelled due to maintenance after a 3 hr 55 min delay.
UA57 EWR-CDG 772 cancelled due to maintenance after a 7 hr 55 min delay. Return UA56 CDG-EWR on 1/15 cancelled as a result.
UA748 IAD-GVA 763 returned to IAD after 36 mins in the air. Flight took off again with a different aircraft and arrived at GVA 2 hrs 52 mins late.
UA929 ORD-LHR 763 cancelled due to maintenance.
UA949 LHR-SFO 772 diverted to DEN due to flight preparation. Flight will continue to SFO as UA3023.
UA958 LHR-ORD 763 cancelled due to maintenance after a 2 hr 20 min delay.
UA1122 EWR-CPT 789 returned to EWR after 4 hrs 10 mins in the air. Flight arrived at CPT 8 hrs 10 mins late.