Elevated Expressway Going to New Manila International Airport in Bulacan | Camella The Ninoy Aquino International Airport (NAIA) is the busiest airport in the country, catering to about 39 airlines and connecting Metro Manila to over 75 destinations. Since NAIA is the sole airport serving NCR, it’s often congested and extremely busy. Moreover, the roads leading to NAIA struggle to keep up with the...