AirHint found the following cheapest return flights from Sydney (SYD) to Tongatapu (TBU) in September 2026 (see full year).
Return flights
| 10 Sep - 16 Sep | Fiji Airways | ||
| 08 Sep - 15 Sep | Fiji Airways | ||
| 05 Sep - 15 Sep | Qantas | direct | |
| 05 Sep - 12 Sep | Qantas | direct | |
| 08 Sep - 15 Sep | Qantas | direct |
Also check the deals for one-way flights from Sydney to Tongatapu in September.
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