AirHint found the following cheapest return flights from Auckland (AKL) to Tongatapu (TBU) in December 2025 (see full year).

Return flights

12 Dec - 19 Dec	Fiji Airways
04 Dec - 08 Dec	Air New Zealand	direct
11 Dec - 18 Dec	Air New Zealand
17 Dec - 24 Dec	Air New Zealand
24 Dec - 30 Dec	Air New Zealand	direct
15 Dec - 22 Dec	Air New Zealand	direct
24 Dec - 08 Jan	Fiji Airways
22 Dec - 08 Jan	Fiji Airways

Also check the deals for one-way flights from Auckland to Tongatapu in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Auckland to Tongatapu in December from $355

Return flights