AirHint found the following cheapest one-way flights from Seattle (SEA) to Singapore (SIN) in August 2025 (see full year).
One-Way flights
| 23 Aug | Singapore Airlines | direct | |
| 24 Aug | Singapore Airlines | direct | |
| 12 Aug | Air Canada | ||
| 11 Aug | Asiana Airlines | ||
| 12 Aug | Singapore Airlines | direct |
Also check the deals for return flights from Seattle to Singapore 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.
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