Cheapest return flights from Seattle to Singapore in May from $734

Best time to book flights for Seattle (SEA) to Singapore (SIN) flights at AirHint

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

Return flights

15 May - 20 May Singapore Airlines direct
15 May - 22 May Singapore Airlines direct
13 May - 27 May Singapore Airlines direct
22 May - 26 Jun Singapore Airlines direct
18 May - 25 May Singapore Airlines direct
11 May - 17 May Asiana Airlines
12 May - 18 May Asiana Airlines
28 May - 25 Jun Korean Air
29 May - 26 Jun Korean Air
11 May - 17 May Singapore Airlines direct
29 May - 26 Jun Singapore Airlines direct
23 May - 30 May Korean Air

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

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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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