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

Return flights

16 Dec - 21 Dec	easyJet
11 Dec - 18 Dec	British Airways
18 Dec - 21 Dec	British Airways
01 Dec - 08 Dec	Ryanair
01 Dec - 04 Dec	Ryanair
19 Dec - 21 Dec	British Airways
24 Dec - 28 Dec	British Airways
27 Dec - 01 Jan	British Airways
29 Dec - 04 Jan	KLM

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 155€

Return flights