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

Return flights

11 Dec - 15 Dec	easyJet
04 Dec - 08 Dec	easyJet
04 Dec - 07 Dec	easyJet
08 Dec - 11 Dec	easyJet
15 Dec - 18 Dec	easyJet
11 Dec - 14 Dec	easyJet
08 Dec - 15 Dec	easyJet
01 Dec - 08 Dec	easyJet
11 Dec - 21 Dec	easyJet
01 Dec - 07 Dec	easyJet
15 Dec - 01 Jan	easyJet
28 Dec - 08 Jan	easyJet
29 Dec - 08 Jan	easyJet
28 Dec - 01 Jan	easyJet
13 Dec - 11 Jan	easyJet
31 Dec - 05 Jan	easyJet
23 Dec - 01 Jan	easyJet
30 Dec - 01 Jan	easyJet
31 Dec - 08 Jan	easyJet
24 Dec - 01 Jan	easyJet

Also check the deals for one-way flights from Southend 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Southend to Keflavik in December from $335

Return flights