The unarmed Minuteman III flew 4,200 miles from California's Vandenberg Space Force Base to a ballistic missile test site in the Marshall Islands.
The Air Force has rotated bombers through overseas deployments as part of task forces since 2018.
The B-21 Raider has so far avoided ballooning costs, said Air Force Chief of Staff Gen. David Allvin.
The Air Force is rethinking its approach to air dominance, which Northrop Grumman thinks could show whether more B-21s are in the cards.
