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

Return flights

04 Dec - 11 Dec	easyJet
13 Dec - 16 Dec	Ryanair
04 Dec - 07 Dec	easyJet
03 Dec - 08 Dec	easyJet
10 Dec - 12 Dec	easyJet
01 Dec - 04 Dec	Ryanair
08 Dec - 15 Dec	Ryanair
08 Dec - 12 Dec	Ryanair
05 Dec - 07 Dec	Ryanair
15 Dec - 18 Dec	Ryanair
30 Dec - 01 Jan	Ryanair
30 Dec - 02 Jan	Ryanair
29 Dec - 02 Jan	Ryanair
28 Dec - 02 Jan	easyJet
26 Dec - 02 Jan	British Airways

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 189€

Return flights