Cheapest return flights from Seattle to Singapore in October from $624

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

Return flights

26 Oct - 31 Oct Singapore Airlines direct
05 Oct - 09 Nov Philippine Airlines
21 Oct - 30 Oct Singapore Airlines direct
07 Oct - 31 Oct Alaska Airlines
28 Oct - 01 Nov Asiana Airlines
21 Oct - 05 Nov Korean Air
27 Oct - 31 Oct Air Canada
23 Oct - 31 Oct Alaska Airlines
14 Oct - 16 Nov Asiana Airlines
16 Oct - 04 Nov Singapore Airlines direct
15 Oct - 03 Nov United
07 Oct - 14 Oct United
07 Oct - 11 Oct United
03 Oct - 19 Oct United
28 Oct - 01 Nov Singapore Airlines direct
07 Oct - 31 Oct Singapore Airlines direct
02 Oct - 10 Oct Korean Air

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

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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