The US government is proposing to award Delta Air Lines, American Airlines and Hawaiian Airlines with routes to Tokyo’s Haneda Airport, the Department of Transportation said Friday. Access to what has been primarily a domestic airport near downtown Tokyo is much coveted by US carriers, who for years had been limited to serving Narita Airport, which is further from the city. The four daily roundtrip flights routes are a result of a new, liberalised air treaty between the two countries in December and an expansion of Haneda.