UA128 GIG-IAH 763 cancelled due to maintenance after an anticipated 4 hr 10 min delay.
UA884 IAD-FCO 772 cancelled due to maintenance after an anticipated 4 hr 20 min delay. Return UA885 FCO-IAD on 7/23 cancelled as a result.
UA932 IAD-FRA 772 cancelled due to maintenance. Return UA933 FRA-IAD on 7/23 cancelled as a result.