Cheapest return flights from Singapore to Seattle in December from $817

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

Return flights

12 Dec - 23 Dec STARLUX Airlines
12 Dec - 26 Dec STARLUX Airlines
18 Dec - 25 Dec STARLUX Airlines
12 Dec - 19 Dec STARLUX Airlines
18 Dec - 25 Dec Singapore Airlines direct
12 Dec - 23 Dec Singapore Airlines direct
19 Dec - 02 Jan Delta

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