As traffic and other sources add more pollutants to the air, the smog gets worse. Ironically, smog is often more severe farther away from the sources of pollution, because the chemical reactions that cause smog take place in the atmosphere while pollutants are drifting on the wind. Smog: Frequently Asked Questions.
There are two major airports if you are flying into the Big Island, Kona International Airport [1] and Hilo International Airport [2]. There are a few non-stop flights from the mainland, mostly from California and Seattle, but it is more common to arrive via Honolulu or Kahului.
How to Get There. More than 20 major airlines serve Honolulu, Hawaii's busiest airport. There are also direct flights from the mainland to Maui, Kauai, and Hawaii's Big Island, but for the most part, you may need to connect through Oahu to get to the neighboring islands. Must See. On Kauai, Waimea Canyon is the largest canyon in the Pacific and truly a dramatic sight to behold.