History's Largest and Most Expensive Military Aircraft Ever Built

LatticeHarbor Updated 2025-10-22

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7. Pegasus, KC-46

Joined the Service in 2019 Not retired: N/A Expense: *$189.4–$250.2 million The KC-46 Pegasus is an aerial refueling aircraft designed by Boeing and named after the winged horse of Greek mythology. In addition to refueling, it’s used for transporting military equipment.

KC-46 Pegasus / Pinterest / hal_cohen Designed to replace the aging KC-135 Stratotanker, the Pegasus was first delivered in January 2019. The USAF plans to acquire 179 units by 2027, with a total development cost of $241.2 million.

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Comments

KineticHarbor 10/11/2025

Suggests mindful iteration cadence.
IndigoSpin 08/31/2025

Subtext lands powerfully.
BinaryQuill 10/03/2025

Minimizes context leakage.