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

Return flights

08 Mar - 22 Mar	Asiana Airlines
10 Mar - 18 Mar	Asiana Airlines
09 Mar - 17 Mar	Asiana Airlines
14 Mar - 21 Mar	Air Canada
08 Mar - 22 Mar	Philippine Airlines	direct
15 Mar - 22 Mar	Philippine Airlines	direct

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

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 March from 623€

Return flights