AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Singapore (SIN) in December 2025 (see full year).
Return flights
| 22 Dec - 31 Dec | Frontier Airlines | ||
| 20 Dec - 29 Dec | Spirit Airlines | ||
| 24 Dec - 31 Dec | Air France | ||
| 20 Dec - 31 Dec | Spirit Airlines | ||
| 24 Dec - 02 Jan | Frontier Airlines | ||
| 15 Dec - 05 Jan | United |
Also check the deals for one-way flights from Raleigh-durham to Singapore in December.
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