AirHint found the following cheapest return flights from Manila (MNL) to Seattle (SEA) in September 2026 (see full year).
Return flights
| 20 Sep - 04 Oct | China Airlines | ||
| 10 Sep - 30 Sep | China Airlines | ||
| 20 Sep - 04 Oct | Philippine Airlines | direct | |
| 19 Sep - 03 Oct | Air Canada |
Also check the deals for one-way flights from Manila to Seattle in September.
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