The Aircraft Carriers USS Lexington, USS Yorktown, USS Hornet, and USS Enterprise were all away on exercise on the morning of December 7th 1941.
Later, they were instrumental in turning the tide in the Pacific.
Fact about USS Enterprise (CV-6):
Enterprise took part in every major battle of the Pacific all the way up to the battle of Okinawa, the Kamikaze that struck her during that battle forced the ship back to Pearl Harbor for repairs.