AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Lisbon (LIS) in December 2025 (see full year).
Return flights
| 11 Dec - 16 Dec | Spirit Airlines | ||
| 01 Dec - 20 Dec | Delta | ||
| 01 Dec - 27 Dec | Air France | ||
| 26 Dec - 17 Jan | British Airways | ||
| 26 Dec - 06 Jan | Air France | ||
| 24 Dec - 30 Dec | Air France |
Also check the deals for one-way flights from Raleigh-durham to Lisbon in December.
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.
Find us on social media