Cheapest return flights from Seattle to Singapore in January from $689

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

Return flights

13 Jan - 20 Jan Asiana Airlines
29 Jan - 08 Feb Korean Air
27 Jan - 01 Feb Asiana Airlines
25 Jan - 28 Jan Asiana Airlines
19 Jan - 04 Feb United
28 Jan - 10 Feb Delta
25 Jan - 26 Feb United
18 Jan - 27 Jan Korean Air
26 Jan - 31 Jan United
15 Jan - 25 Jan Singapore Airlines
15 Jan - 25 Jan Singapore Airlines direct
30 Jan - 08 Feb China Airlines
17 Jan - 27 Jan Turkish Airlines
17 Jan - 26 Jan EVA Air
17 Jan - 24 Jan Turkish Airlines
17 Jan - 25 Jan Turkish Airlines
27 Jan - 21 Feb United
27 Jan - 01 Feb Singapore Airlines direct
30 Jan - 08 Feb Singapore Airlines direct
29 Jan - 08 Feb Singapore Airlines direct

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

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