AirHint found the following cheapest return flights from Seattle (SEA) to Singapore (SIN) in April 2026 (see full year).
Return flights
| 30 Apr - 14 May | Philippine Airlines | ||
| 13 Apr - 20 Apr | Asiana Airlines | ||
| 14 Apr - 21 Apr | Air Canada | ||
| 14 Apr - 21 Apr | Singapore Airlines | direct | |
| 30 Apr - 14 May | Singapore Airlines | direct |
Also check the deals for one-way flights from Seattle to Singapore in April.
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