Cheapest return flights from Seattle to Singapore in April from $522

AirHint found the following cheapest return flights from Seattle (SEA) to Singapore (SIN) in April 2026 (see full year).

Return flights

18 Apr - 24 Apr Singapore Airlines direct
19 Apr - 24 Apr Singapore Airlines direct
21 Apr - 28 Apr Singapore Airlines direct
17 Apr - 28 Apr Singapore Airlines direct
12 Apr - 17 Apr Singapore Airlines direct
07 Apr - 24 Apr Singapore Airlines direct
16 Apr - 30 Apr Singapore Airlines direct
09 Apr - 23 Apr United
01 Apr - 15 Apr United
18 Apr - 25 Apr United
26 Apr - 03 May United
28 Apr - 03 May Cathay Pacific
26 Apr - 03 May Singapore Airlines direct

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

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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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