United Airlines (UA, Chicago O'Hare) and Griffin Global Asset Management have announced a new long-term lease agreement for six B737-9s that were delivered over the course of April and May 2025.

It is the first time the carrier and the lessor have partnered. The ch-aviation database shows United Airlines added ten B737-9s during those two months. This is part of the company's overall fleet plan, which aims to increase the fleet size from 1,018 aircraft in the first quarter to 1,054 by the end of the year, including adding twenty-seven B737 MAX units.

The US carrier leases part of its fleet, from AerCap, Aero Capital Solutions, Aircastle, Aviation Capital Group, Aviator Capital, BOC Aviation, CALC, CDB Aviation, Macquarie AirFinance, ORIX Aviation, SkyWorks Leasing, and SMBC Aviation Capital.

United Airlines' fleet currently comprises eighty-one A319-100s, seventy-six A320-200s, thirty-seven A321-200NX, forty B737-700s, 141 B737-800s, 122 B737-8s, 103 B737-9s, twelve B737-900s, 136 B737-900ERs, forty B757-200s, twenty-one B757-300s, thirty-seven B767-300ERs, sixteen B767-400ERs, nineteen B777-200s, fifty-five B777-200ERs, twenty-two B777-300ERs, twenty-one B787-10s, twelve B787-8s, and forty-five B787-9s.