AirHint found the following cheapest one-way flights from Porto (OPO) to Singapore (SIN) in December 2025 (see full year).
One-Way flights
| 04 Dec | Ryanair | ||
| 05 Dec | Ryanair | ||
| 20 Dec | Vueling Airlines | ||
| 09 Dec | KLM | ||
| 31 Dec | easyJet | ||
| 24 Dec | easyJet | ||
| 23 Dec | KLM | ||
| 27 Dec | IndiGo | ||
| 16 Dec | KLM |
Also check the deals for return flights from Porto to Singapore in December.
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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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