AirHint found the following cheapest return flights from Southend (SEN) to Keflavik (KEF) in May 2026 (see full year).

Return flights

15 May - 22 May	easyJet
01 May - 10 May	easyJet
10 May - 16 May	easyJet
15 May - 24 May	easyJet
08 May - 17 May	easyJet
01 May - 09 May	easyJet
01 May - 31 May	easyJet
31 May - 13 Jun	easyJet
06 May - 09 May	easyJet
04 May - 15 May	easyJet
06 May - 16 May	easyJet
28 May - 03 Jun	easyJet
31 May - 17 Jun	easyJet
24 May - 01 Jun	easyJet
25 May - 03 Jun	easyJet

Also check the deals for one-way flights from Southend to Keflavik in May.

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 Southend to Keflavik in May from 290€

Return flights