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

Return flights

06 Mar - 10 Mar	Fiji Airways
19 Mar - 26 Mar	Fiji Airways
14 Mar - 21 Mar	Fiji Airways
20 Mar - 04 Apr	Fiji Airways
14 Mar - 21 Mar	Qantas	direct
26 Mar - 07 Apr	Fiji Airways
27 Mar - 07 Apr	Fiji Airways
10 Mar - 20 Mar	Fiji Airways
16 Mar - 21 Mar	Fiji Airways
10 Mar - 19 Mar	Fiji Airways
07 Mar - 14 Mar	Fiji Airways
31 Mar - 04 Apr	Qantas	direct
31 Mar - 07 Apr	Qantas	direct
10 Mar - 21 Mar	Fiji Airways
07 Mar - 14 Mar	Qantas	direct
25 Mar - 06 Apr	Fiji Airways
26 Mar - 06 Apr	Fiji Airways

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

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 March from 343€

Return flights