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

Return flights

23 Dec - 30 Dec	easyJet
12 Dec - 15 Dec	British Airways
23 Dec - 28 Dec	easyJet
22 Dec - 27 Dec	easyJet
16 Dec - 20 Dec	easyJet
17 Dec - 21 Dec	easyJet
15 Dec - 20 Dec	easyJet
14 Dec - 17 Dec	Ryanair
14 Dec - 20 Dec	Ryanair
12 Dec - 14 Dec	Ryanair
29 Dec - 02 Jan	Ryanair
31 Dec - 02 Jan	Ryanair
27 Dec - 02 Jan	Ryanair
26 Dec - 02 Jan	Eurowings

Also check the deals for one-way flights from Newcastle to Keflavik 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 Newcastle to Keflavik in December from 166€

Return flights