AirHint found the following cheapest return flights from Reykjavik (REK) to Belgrade (BEG) in December 2025 (see full year).

Return flights

09 Dec - 12 Jan	easyJet
11 Dec - 14 Jan	KLM
15 Dec - 14 Jan	KLM
09 Dec - 09 Jan	Lufthansa
09 Dec - 13 Jan	easyJet
09 Dec - 11 Jan	easyJet
15 Dec - 20 Jan	easyJet
09 Dec - 14 Jan	easyJet
10 Dec - 14 Jan	Wizz Air
13 Dec - 21 Jan	easyJet
09 Dec - 23 Dec	easyJet
10 Dec - 23 Dec	easyJet
09 Dec - 22 Dec	easyJet
10 Dec - 22 Dec	Wizz Air
11 Dec - 23 Dec	easyJet

Also check the deals for one-way flights from Reykjavik to Belgrade 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 Reykjavik to Belgrade in December from $207

Return flights