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

Return flights

16 Apr - 20 Apr	easyJet	direct
25 Apr - 29 Apr	Icelandair	direct
12 Apr - 15 Apr	Icelandair	direct
12 Apr - 21 Apr	Icelandair	direct
10 Apr - 15 Apr	Icelandair	direct
20 Apr - 03 May	Icelandair	direct
13 Apr - 15 Apr	easyJet
23 Apr - 26 Apr	Icelandair	direct
20 Apr - 24 Apr	Icelandair	direct
30 Apr - 09 May	Icelandair	direct
10 Apr - 16 Apr	Icelandair	direct
27 Apr - 03 May	Icelandair	direct
27 Apr - 04 May	Icelandair	direct
08 Apr - 11 Apr	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.

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Cheapest return flights from London to Keflavik in April from $142

Return flights