ACG and Skymark Airlines Finalize Seven Boeing 737-10 Leases

Aviation Capital Group LLC (ACG) and Japanese carrier Skymark Airlines (BC) have finalized lease agreements for seven Boeing 737-10 aircraft, with deliveries scheduled to begin in 2028.

Announced on July 20, 2026, at the Farnborough International Airshow, the agreement supports Skymark’s strategy to increase passenger capacity on domestic routes operating out of the highly slot-constrained Tokyo Haneda Airport (HND). The Boeing 737-10 is the largest variant in the 737 MAX family, offering the airline a higher-density configuration compared to its existing fleet.

Fleet Modernization and Capacity Growth

Skymark currently operates a fleet of 30 aircraft, consisting of Boeing 737-800s and Boeing 737-8s. According to fleet data reported by ch-aviation, the airline plans to configure the newly leased Boeing 737-10s with 207 seats. This represents an increase of 30 seats per aircraft over its current 177-seat Boeing 737-800 and 737-8 configurations.

The capacity increase is critical for Skymark’s operations at HND, where adding new flights is restricted by slot availability. Aviation Week reports that Skymark is offering 6.03 million seats across its domestic network during the summer 2026 season, representing a 0.4 percent increase year-over-year. The introduction of the larger Boeing 737-10 will allow the carrier to grow its passenger volume without requiring additional departure slots.

“For airlines serving high-density markets from slot-constrained airports, the ability to add capacity, improve efficiency, and maximize revenue opportunities is critical,” ACG Chief Executive Officer and President Thomas Baker stated in the July 20 press release.

Expanding Boeing 737 MAX Commitments

The ACG lease agreement builds on Skymark’s existing commitments for the Boeing 737 MAX family. Aviation Week notes that the carrier already holds firm orders directly with The Boeing Company for seven Boeing 737-10s, alongside a mix of orders and lease agreements for seven Boeing 737-8s. Skymark became the first Japanese airline to introduce the Boeing 737-8 into commercial service in May 2026, debuting the aircraft on the route between HND and Fukuoka Airport (FUK).

Skymark Airlines President and Representative Director Yoshihiro Miwa highlighted the operational benefits of the new aircraft.

“We look forward to operating the 737-10, which boasts the largest capacity in the MAX series, and welcoming even more passengers to enjoy the Skymark experience.”

The Boeing 737-10 is also expected to deliver improved operating economics. A May 2026 Skymark fleet presentation cited by ch-aviation estimated a 19 percent reduction in fuel costs per seat for the Boeing 737-10 compared to the older-generation Boeing 737-800.

Aviation Capital Group’s Farnborough Momentum

The Skymark deal marks the second major Boeing 737-10 placement announced by ACG in July 2026. On July 14, 2026, the lessor announced long-term lease agreements with Canadian carrier WestJet (WS) for 13 Boeing 737-10 aircraft.

The consecutive agreements underscore strong lessor demand for the largest MAX variant as airlines seek to maximize yield in constrained airport environments.

AirPro News analysis

We view Skymark’s decision to lease additional Boeing 737-10s as a pragmatic approach to the strict slot limitations at Tokyo Haneda Airport. By upgauging from the Boeing 737-800 to the 737-10, Skymark can add 30 seats per departure. This strategy mirrors a broader industry trend where carriers operating in congested hubs rely on larger narrowbody variants to drive growth when frequency expansion is impossible. Securing these airframes through a lessor like ACG provides Skymark with delivery certainty starting in 2028, insulating the carrier’s near-term growth plans from potential direct-from-manufacturer delivery delays.

Sources: Aviation Capital Group