Cheapest one-way flights from Singapore to Seattle in August from $604
AirHint found the following cheapest one-way flights from Singapore (SIN) to Seattle (SEA) in August 2025 (see full year).
One-Way flights
| 20 Aug | United |
Also check the deals for return flights from Singapore to Seattle in August.
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.
