N2135U Boeing 777-300ER United Airlines deployed a Boeing 777-300ER (N2135U) on the Newark to Dublin Airport route for the first time operating UAL23/33 on Friday 8 June in lieu of the usual Boeing 777-200 for operational reasons. The Boeing 777-300ER is the newest aircraft in the United fleet entering service last year. In 2015 the carrier officially announced the conversion of ten of their orders for the Boeing 787-9 into orders for the Boeing 777-300ER noting that "The aircraft will provide attractive upgauge and range opportunities to the company at competitive economics." The carrier operates a fleet of 17 Boeing 777-300ER aircraft with one aircraft outstanding from order book operating primarily on Asia routes from Newark and San Franciso hubs. United’s 777-300ER aircraft features the new Polaris business class seat. Each Polaris suite-like pod will feature direct access to the aisle, a 180-degree flat-be