AirHint found the following cheapest return flights from Sydney (SYD) to Tongatapu (TBU) in January 2026 (see full year).

Return flights

19 Jan - 14 Feb	Fiji Airways
31 Jan - 21 Feb	Fiji Airways
27 Jan - 07 Feb	Fiji Airways
31 Jan - 21 Feb	Qantas	direct
17 Jan - 24 Jan	Qantas	direct
27 Jan - 07 Feb	Qantas	direct
24 Jan - 27 Jan	Qantas	direct
20 Jan - 27 Jan	Qantas	direct
27 Jan - 31 Jan	Qantas	direct
27 Jan - 30 Jan	Fiji Airways
20 Jan - 28 Jan	Fiji Airways
24 Jan - 29 Jan	Fiji Airways
13 Jan - 17 Jan	Fiji Airways
16 Jan - 24 Jan	Fiji Airways
13 Jan - 19 Jan	Fiji Airways

Also check the deals for one-way flights from Sydney to Tongatapu in January.

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 Sydney to Tongatapu in January from $481

Return flights