AirHint found the following cheapest one-way flights from Seattle (SEA) to Singapore (SIN) in October 2026 (see full year).
One-Way flights
| 08 Oct | Philippine Airlines | ||
| 09 Oct | Asiana Airlines | ||
| 10 Oct | Asiana Airlines | ||
| 08 Oct | Singapore Airlines | direct | |
| 09 Oct | Singapore Airlines | direct | |
| 10 Oct | Singapore Airlines | direct |
Also check the deals for return flights from Seattle to Singapore in October.
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