With all major source markets showing good growth, Australian visitor arrivals continued to dominate, climbing 13 per cent.
New Zealand figures increased 17 per cent from 443 to 519.
Papua New Guinea figures increased from 377 to 492 an increase of 30.5 per cent while US figures grew 19 per cent.
Visitation from Japan climbed by 40 per cent from 207 to 290.
This is attributed to renewed interest in the destination following on from the 75th anniversary of the Guadalcanal campaign last August.
European traffic also continued building momentum, a 48.9 per cent increase over what was achieved in 2017.
The April result follows the destination’s best-ever result with collective visitor arrivals on the first quarter of 2018 up 29 per cent.