Cheapest one-way flights from Singapore to Seattle in September from $476
AirHint found the following cheapest one-way flights from Singapore (SIN) to Seattle (SEA) in September 2025 (see full year).
One-Way flights
| 09 Sep | Scoot Tigerair | ||
| 18 Sep | STARLUX Airlines | ||
| 08 Sep | STARLUX Airlines | ||
| 11 Sep | Delta | ||
| 18 Sep | Singapore Airlines | direct | |
| 09 Sep | Singapore Airlines | direct |
Also check the deals for return flights from Singapore to Seattle in September.
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.
