AirHint found the following cheapest return flights from Charlotte (CLT) to Porto (OPO) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec	Iberia
02 Dec - 10 Dec	Iberia
08 Dec - 16 Dec	Iberia
09 Dec - 17 Dec	Iberia
02 Dec - 09 Dec	Iberia
04 Dec - 11 Dec	Spirit Airlines
04 Dec - 12 Dec	Spirit Airlines
08 Dec - 15 Dec	Spirit Airlines
01 Dec - 09 Dec	Iberia
03 Dec - 10 Dec	Spirit Airlines
31 Dec - 08 Jan	American Airlines
31 Dec - 07 Jan	Iberia
30 Dec - 07 Jan	Iberia
30 Dec - 06 Jan	KLM
29 Dec - 05 Jan	KLM
28 Dec - 05 Jan	KLM
29 Dec - 06 Jan	KLM
27 Dec - 04 Jan	British Airways
24 Dec - 01 Jan	Spirit Airlines
28 Dec - 04 Jan	Lufthansa

Also check the deals for one-way flights from Charlotte to Porto 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.

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Cheapest return flights from Charlotte to Porto in December from 419€

Return flights