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

Return flights

21 Apr - 28 Apr	Ryanair
24 Apr - 28 Apr	Ryanair
04 Apr - 18 Apr	Ryanair
13 Apr - 22 Apr	Ryanair
15 Apr - 23 Apr	Ryanair
26 Apr - 29 Apr	Ryanair
08 Apr - 12 Apr	Ryanair
01 Apr - 09 Apr	Jet2
07 Apr - 12 Apr	Ryanair
09 Apr - 12 Apr	Ryanair
15 Apr - 06 May	Ryanair
25 Apr - 02 May	Ryanair
30 Apr - 03 May	Ryanair
30 Apr - 04 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 180€

Return flights