Large, regional and small airports each contribute to the growing global aviation network. Scheduled carriers are prompting hub airports to accelerate access to major cities around the world. Some of these burgeoning airports, or megahubs, have become magnets for business development while contributing to solutions for urban development challenges. Point-to-point services from low-cost carriers have enabled secondary airports to open up access to regional cities and towns on almost every continent. Smaller regional airports continue to play a critical role in connecting communities to national and world economies.