Cheapest return flights from Boston to Sydney in December from 1173€

AirHint found the following cheapest return flights from Boston (BOS) to Sydney (SYD) in December 2025 (see full year).

Return flights

30 Dec - 13 Jan Air Canada
11 Dec - 18 Dec United
12 Dec - 04 Jan Air Canada
11 Dec - 03 Jan Air Canada
18 Dec - 25 Dec Air Canada
20 Dec - 23 Dec Air Canada
22 Dec - 01 Jan United
21 Dec - 07 Jan Qantas
20 Dec - 04 Jan British Airways

Also check the deals for one-way flights from Boston to Sydney in December.

Skyscanner

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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