UA53 ZRH-IAD 763 diverted to SNN due to a medical emergency. Flight continued with a different aircraft taken from UA925 and arrived at IAD 6 hrs 19 mins late.
https://www.thejournal.ie/medical-em...17571-Feb2025/
UA164 EWR-DXB 772 cancelled due to weather after a 3 hr 15 min delay. Return UA163 DXB-EWR on 2/10 cancelled as a result.
UA188 EWR-JNB 789 cancelled due to maintenance after a 4 hr 5 min delay. Return UA187 JNB-EWR on 2/9 cancelled as a result.
UA880 IAH-LHR 772 returned to IAH due to maintenance after 5 hrs 33 mins in the air. Flight took off again with a different aircraft and arrived at LHR 7 hrs 47 mins late.
UA909 ORD-AMS 788 cancelled due to maintenance after a 1 hr 40 min delay. Return UA908 AMS-ORD on 2/9 cancelled as a result.
UA925 LHR-IAD 763 cancelled due to an unexpected operational issue. That plane and crew was used to continue UA53 after it was diverted to SNN.