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

Return flights

15 Mar - 18 Mar	Jet2	direct
15 Mar - 25 Mar	Jet2	direct
22 Mar - 25 Mar	Jet2	direct
08 Mar - 18 Mar	Ryanair
14 Mar - 18 Mar	Ryanair
15 Mar - 22 Mar	Jet2
09 Mar - 18 Mar	Ryanair
14 Mar - 19 Mar	Ryanair
21 Mar - 22 Mar	Ryanair
15 Mar - 17 Mar	Jet2
13 Mar - 20 Apr	Ryanair
25 Mar - 05 Apr	Ryanair
25 Mar - 02 Apr	Ryanair
29 Mar - 14 Apr	Ryanair
12 Mar - 17 Apr	Ryanair
25 Mar - 10 Apr	Jet2
30 Mar - 08 Apr	Ryanair
25 Mar - 01 Apr	Jet2	direct
26 Mar - 07 Apr	Ryanair
23 Mar - 02 Apr	Ryanair

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

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 March from 119€

Return flights