UA22 DUB-EWR 763 (usually 764) cancelled due to an unexpected operational issue. Replacement flight UA3020 operated with a scheduled departure 25 minutes later than UA22.
UA52 IAD-ZRH 763 returned to IAD after 2 hrs 8 mins in the air. Flight took off again with a different aircraft, arriving 5 hrs 6 mins late.
UA154 Island Hopper 738 cancelled after KWA-KSA due to maintenance after a 6 hr 20 min delay.
UA330 IAD-CDG 763 cancelled due to maintenance after an anticipated 35 minute delay. Return UA331 CDG-IAD on 10/15 cancelled as a result.
UA943 LIS-IAD 764 cancelled due to maintenance after a 3 hr 15 min delay.
UA997 ACC-IAD 788 cancelled due to maintenance after a 3 hr 40 min delay.