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

Return flights

01 Oct - 21 Oct	Korean Air
01 Oct - 19 Oct	Korean Air
21 Oct - 01 Nov	Asiana Airlines
01 Oct - 18 Oct	Korean Air
25 Oct - 08 Nov	United
01 Oct - 31 Oct	Korean Air
01 Oct - 19 Oct	Philippine Airlines	direct

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

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 October from 612€

Return flights