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

Return flights

08 Dec - 22 Jan	United
10 Dec - 23 Dec	United
10 Dec - 24 Dec	United
03 Dec - 10 Dec	Delta
22 Dec - 29 Dec	Air Canada
28 Dec - 13 Jan	Hawaiian Airlines
16 Dec - 23 Dec	Alaska Airlines
24 Dec - 11 Jan	Alaska Airlines
23 Dec - 29 Dec	Frontier Airlines
23 Dec - 05 Jan	Alaska Airlines
25 Dec - 06 Jan	Hainan Airlines
15 Dec - 30 Dec	Hawaiian Airlines
22 Dec - 05 Jan	Alaska Airlines
24 Dec - 06 Jan	Alaska Airlines
26 Dec - 09 Jan	Hawaiian Airlines
18 Dec - 05 Jan	Alaska Airlines
19 Dec - 23 Dec	Frontier Airlines
11 Dec - 03 Jan	Alaska Airlines

Also check the deals for one-way flights from Seattle to Auckland 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 Seattle to Auckland in December from 823€

Return flights