Cheapest return flights from Seattle to Singapore in January from $686

AirHint found the following cheapest return flights from Seattle (SEA) to Singapore (SIN) in January 2026 (see full year).

Return flights

25 Jan - 27 Jan Asiana Airlines
13 Jan - 24 Jan Asiana Airlines
08 Jan - 08 Feb Asiana Airlines
06 Jan - 30 Jan Asiana Airlines
21 Jan - 25 Jan Philippine Airlines
16 Jan - 24 Jan Singapore Airlines
30 Jan - 08 Feb Korean Air
08 Jan - 14 Jan ANA
23 Jan - 26 Jan United
24 Jan - 27 Jan United
09 Jan - 14 Jan United
09 Jan - 16 Jan United
08 Jan - 08 Feb Singapore Airlines direct

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

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