Cheapest return flights from Raleigh-durham to Lisbon in December from $490

AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Lisbon (LIS) in December 2025 (see full year).

Return flights

11 Dec - 18 Dec Air Canada
11 Dec - 16 Dec United
27 Dec - 17 Jan Finnair
14 Dec - 21 Dec Finnair
17 Dec - 25 Dec KLM
26 Dec - 17 Jan Iberia
24 Dec - 30 Dec British Airways
13 Dec - 28 Dec British Airways
11 Dec - 03 Jan Frontier Airlines
14 Dec - 03 Jan Frontier Airlines

Also check the deals for one-way flights from Raleigh-durham to Lisbon in December.

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