Cheapest return flights from Seattle to Singapore in December from 922€

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

Return flights

06 Dec - 13 Dec Hawaiian Airlines
25 Dec - 10 Jan Air Canada
24 Dec - 09 Jan Asiana Airlines
19 Dec - 23 Dec STARLUX Airlines
23 Dec - 30 Dec STARLUX Airlines
25 Dec - 10 Jan Singapore Airlines direct
23 Dec - 30 Dec Singapore Airlines direct
19 Dec - 23 Dec Singapore Airlines direct

Also check the deals for one-way flights from Seattle to Singapore 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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