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

Return flights

03 May - 06 May	easyJet	direct
06 May - 13 May	easyJet	direct
27 May - 10 Jun	easyJet	direct
31 May - 14 Jun	easyJet	direct
09 May - 13 May	Wizz Air Malta
15 May - 17 May	easyJet
12 May - 16 May	Wizz Air Malta
15 May - 21 May	Wizz Air Malta
27 May - 31 May	easyJet	direct
04 May - 16 May	Wizz Air
09 May - 16 May	Wizz Air Malta
09 May - 23 May	Wizz Air Malta
28 May - 04 Jun	Ryanair
23 May - 02 Jun	Wizz Air
24 May - 01 Jun	Wizz Air

Also check the deals for one-way flights from London 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 London to Keflavik in May from 88€

Return flights