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

Return flights

14 Apr - 21 Apr	Ryanair
21 Apr - 24 Apr	Ryanair
21 Apr - 28 Apr	Ryanair
18 Apr - 21 Apr	Ryanair
18 Apr - 24 Apr	Ryanair
13 Apr - 21 Apr	Ryanair
21 Apr - 25 Apr	Ryanair
17 Apr - 21 Apr	Ryanair
23 Apr - 28 Apr	Ryanair
13 Apr - 26 Apr	Ryanair
28 Apr - 12 May	Ryanair
28 Apr - 05 May	Ryanair
13 Apr - 05 May	Ryanair
21 Apr - 01 May	Ryanair
13 Apr - 01 May	Ryanair
28 Apr - 01 May	Ryanair
29 Apr - 05 May	Ryanair
24 Apr - 01 May	Ryanair
20 Apr - 01 May	Ryanair
23 Apr - 01 May	Ryanair

Also check the deals for one-way flights from London to Keflavik in April.

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 April from 106€

Return flights