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

Return flights

21 Apr - 25 Apr	easyJet
24 Apr - 29 Apr	easyJet
11 Apr - 19 Apr	Ryanair
24 Apr - 28 Apr	Ryanair
22 Apr - 27 Apr	Ryanair
22 Apr - 25 Apr	Ryanair
22 Apr - 24 Apr	Ryanair
21 Apr - 24 Apr	Ryanair
20 Apr - 23 Apr	Ryanair
13 Apr - 23 Apr	Ryanair
28 Apr - 06 May	Ryanair
28 Apr - 02 May	Ryanair
27 Apr - 11 May	easyJet
27 Apr - 05 May	Ryanair
30 Apr - 05 May	Ryanair
30 Apr - 15 May	Ryanair
27 Apr - 01 May	easyJet

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from London to Keflavik in April from 162€

Return flights