It appears the Qantas link stemmed from here. Shortens the time frame.
Greg Zieber recalled, "I lived & worked on Johnston Island for 6.5 years, 1994 to mid 2000.
There were several times that the runway was used for emergency landings.
Small civil aviation type aircraft (Cessna for example), large commercial jet aircraft including a Qantas 747, and various military aircraft also used the airfield for bona fide declared emergencies.
Some examples were low on fuel due to high headwinds, loss of cabin pressure, passengers in need of medical attention, bird strikes etc.
Aloha Airlines also made weekly scheduled flights to the island carrying civilian & military personnel, and also for refueling before continuing down range to the Marshall Islands.
In the 1990's there were flights almost daily, and some days saw up to 3 aircraft."
Abandoned & Little-Known Airfields: Western Pacific Islands