AirHint found the following cheapest return flights from Porto (OPO) to Singapore (SIN) in August 2026 (see full year).
Return flights
| 01 Aug - 18 Aug | Turkish Airlines | ||
| 15 Aug - 29 Aug | Iberia | ||
| 01 Aug - 15 Aug | Ryanair |
Also check the deals for one-way flights from Porto to Singapore in August.
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