Cheapest one-way flights from Seattle to Singapore in October from $301

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

One-Way flights

12 Oct Philippine Airlines
19 Oct Philippine Airlines
22 Oct Philippine Airlines
04 Oct Frontier Airlines
20 Oct Korean Air
01 Oct United
17 Oct Frontier Airlines
02 Oct United
17 Oct Singapore Airlines direct
11 Oct United

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

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.

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