One of the best routings from Europe and back is offered by Air New Zealand,

Depending on the time of the year there are two basic routes :

1) Frankfurt -- Los Angeles -- Samoa -- Tonga

2) London -- Los Angeles -- Auckland -- Tonga

Furthermore there are flights with various airlines out of Fiji, Australia and Hawaii

From Nuku´alofa, the capitol of the Kingdom of Tonga and it´s international airport (TBU),

there are daily flights (except sundays) to Ha´apai (HPA) by our local Tongan Airlines