Cheapest one-way flights from Singapore to Seattle in September from $479

AirHint found the following cheapest one-way flights from Singapore (SIN) to Seattle (SEA) in September 2025 (see full year).

One-Way flights

08 Sep Scoot Tigerair
09 Sep Scoot Tigerair
06 Sep Cebu Pacific
07 Sep China Airlines
02 Sep United
06 Sep Singapore Airlines direct
07 Sep Singapore Airlines direct
09 Sep Singapore Airlines direct
02 Sep Singapore Airlines direct

Also check the deals for return flights from Singapore to Seattle in September.

Skyscanner

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.

Book a cheap hotel in Seattle

Cheap car rent in Seattle

Feel free to contact us with any feedback or request another flight research.