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

Return flights

19 Jul - 22 Jul	Air Canada
19 Jul - 26 Jul	United
20 Jul - 26 Jul	United
20 Jul - 22 Jul	United
25 Jul - 17 Aug	United
22 Jul - 29 Jul	Air Canada
23 Jul - 03 Aug	United
18 Jul - 05 Aug	United
18 Jul - 12 Aug	United
26 Jul - 17 Aug	Air Canada
19 Jul - 21 Jul	United
18 Jul - 21 Jul	United
31 Jul - 10 Aug	EVA Air
18 Jul - 12 Aug	Singapore Airlines	direct
18 Jul - 05 Aug	Singapore Airlines	direct
20 Jul - 22 Jul	Singapore Airlines	direct
19 Jul - 22 Jul	Singapore Airlines	direct

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

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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Cheapest return flights from Singapore to Seattle in July from $797

Return flights