Cheapest return flights from Seattle to Singapore in August from $696

AirHint found the following cheapest return flights from Seattle (SEA) to Singapore (SIN) in August 2025 (see full year).

Return flights

17 Aug - 27 Sep Philippine Airlines
31 Aug - 07 Sep Air Canada
18 Aug - 27 Sep Air Canada
16 Aug - 27 Sep Air Canada
12 Aug - 19 Aug Korean Air
17 Aug - 27 Sep Singapore Airlines direct

Also check the deals for one-way flights from Seattle to Singapore in August.

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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