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

Return flights

07 Apr - 28 Apr	Ryanair
10 Apr - 15 Apr	easyJet
06 Apr - 12 Apr	easyJet
01 Apr - 03 Apr	Jet2
23 Apr - 26 Apr	Ryanair
02 Apr - 06 Apr	Ryanair
03 Apr - 06 Apr	Ryanair
30 Apr - 06 May	easyJet
20 Apr - 04 May	easyJet
13 Apr - 20 Apr	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 268€

Return flights