United accelerates premium fleet refresh: A321 ‘Coastliner’, CRJ450 and 787‑9s to cut fuel burn 36%
United is accelerating a fleet and cabin overhaul centered on premium‑heavy A321neo ‘Coastliner’ configurations, 787‑9 upgauging and a modified CRJ450 with first class. The moves raise seat output, reduce fuel burn by over 36% and are backed by 250+ expected deliveries through April 2028.