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The situation on the islands is best described with a statement from Ross Birch, the executive director of the Island of Hawaii Visitors Bureau:
“There is absolutely no reason at this time to change or alter” travel plans to Hawaii in light of the recent volcanic eruption"
The affected area is actually more than 100 miles away from the Kohala and Kona Coasts, where most of the tourist accommodations and attractions on the Big Island are located.

The area of Kilauea - 100 miles from Kailua-Kona Coast
One of the only disruptions in the travel world the volcanic eruption in Hawaii has caused is for Royal Caribbean to cancel a port call, causing a few airlines to issue flight waivers.
Air Access Update: All flights into Ellison Onizuka Kona International Airport at Keahole - KOA (west) and Hilo International Airport - ITO (east) are operating normally.
Keep a closer eye on the whole situation with the National Park System's
Kilauea has been active since 1983 and is one of the most visited in the state. There is a no-fly zone over the volcano, due to frequent volcanic activity.