Cheapest return flights from Belfast to Keflavik in December from $351

AirHint found the following cheapest return flights from Belfast (BFS) to Keflavik (KEF) in December 2025 (see full year).

Return flights

23 Dec - 28 Dec Ryanair
17 Dec - 24 Dec easyJet
16 Dec - 18 Dec easyJet
30 Dec - 07 Jan Ryanair
18 Dec - 21 Dec easyJet
21 Dec - 24 Dec easyJet
20 Dec - 23 Dec easyJet
26 Dec - 29 Dec Ryanair
26 Dec - 28 Dec easyJet
19 Dec - 22 Dec easyJet

Also check the deals for one-way flights from Belfast to Keflavik in December.

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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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