The main airfield is Cassidy and there are 2 others on Kiritimati.
One, called AEON FIELD, is well away from the inhabited area of the
island towards the southern end of the Island. A Japanese Aerospace
organisation used this airfield to launch and land an experimental
plane in 2002. more info at,
http://www.iat.jaxa.jp/res/fstrc/0c04.html