Cheapest return flights from Seattle to Singapore in January from 642€

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

Return flights

06 Jan - 06 Feb Air Canada
07 Jan - 07 Feb Air Canada
17 Jan - 29 Jan United
08 Jan - 15 Jan Delta
01 Jan - 18 Jan United
03 Jan - 31 Jan Frontier Airlines
14 Jan - 21 Jan Delta
11 Jan - 18 Jan Delta
01 Jan - 18 Jan Singapore Airlines direct
12 Jan - 19 Jan Delta
02 Jan - 09 Jan Turkish Airlines

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

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