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

Return flights

27 Jan - 31 Jan	Singapore Airlines
28 Jan - 01 Feb	Asiana Airlines
04 Jan - 20 Jan	Korean Air
14 Jan - 31 Jan	Korean Air
15 Jan - 25 Jan	Korean Air
16 Jan - 22 Jan	Korean Air
16 Jan - 26 Jan	Korean Air
16 Jan - 29 Jan	Korean Air
03 Jan - 19 Jan	Korean Air
03 Jan - 23 Jan	Asiana Airlines
02 Jan - 22 Jan	China Airlines
02 Jan - 21 Feb	China Airlines
01 Jan - 20 Feb	Singapore Airlines
28 Jan - 01 Feb	Philippine Airlines	direct
01 Jan - 20 Feb	Philippine Airlines	direct
05 Jan - 05 Feb	United

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

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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Cheapest return flights from Seattle to Manila in January from 505€

Return flights