Cheapest one-way flights from Seattle to Singapore in October from 333€

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

One-Way flights

01 Oct United
20 Oct United
04 Oct Alaska Airlines
15 Oct Alaska Airlines
11 Oct Frontier Airlines
08 Oct Frontier Airlines
10 Oct Frontier Airlines
13 Oct United
09 Oct United
28 Oct Singapore Airlines direct

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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