A venture of United Airlines plans to buy ExpressJet Airlines from SkyWest for $70 million in cash.

As part of the definitive agreement announced Tuesday, SkyWest will continue to own the Bombadier regional jets currently in service at ExpressJet and will lease 20 of of the CJR200 aircraft to ExpressJet for up to five years.

SkyWest and ExpressJet operate through partnerships with United and other carriers. Both regional carriers fly some flights under the United Express name.

SkyWest’s transaction with ManaAir, a company in which United Airlines has a minority interest, is expected to close in early 2019. The deal also includes ManaAir assuming ExpressJet’s liabilities.