22 Jets On 14 Routes: Where United Airlines Is Flying Its Boeing 777-300ERs This Summer

United has 22 777-300ERs, the first of which (N2231U) was delivered on December 21, 2016, per ch-aviation. The Star Alliance member's first commercial service using the -300ER was between Newark and San Francisco on February 16, 2017, a route that no longer sees the variant.