United Airlines said it would add a second daily flight from Washington DC to London Heathrow and would increase the Houston-London service from five times a week to daily, following the UK government’s announcement that the country would reopen to fully vaccinated travellers from the US from 2 August. The moves will give the carrier six daily flights between the US and LondonThe carrier added that it would resume additional London service in the coming months as well as launch a new service between Boston and London. The carrier also flies daily to London from Chicago, New York/Newark and San Francisco.