British Airways is the official flag carrier of the United Kingdom, with its main hub located at the Long Heathrow Airport. Recently, the airline discontinued all overseas flights in cities that do not originate in London. Now, all international flights that do not leave from London must connect through London. British Airways is one of the very few airlines that is able to fly to all six inhabited continents. To ensure luxury, British Airways offers first class, business class, and economy class on all long-haul trips.