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

Return flights

08 Mar - 11 Mar	easyJet	direct
17 Mar - 24 Mar	easyJet	direct
09 Mar - 12 Mar	easyJet	direct
05 Mar - 10 Mar	easyJet	direct
11 Mar - 18 Mar	easyJet	direct
13 Mar - 16 Mar	easyJet	direct
06 Mar - 13 Mar	easyJet	direct
23 Mar - 27 Mar	easyJet	direct
10 Mar - 15 Mar	easyJet	direct
12 Mar - 15 Mar	easyJet	direct
30 Mar - 03 Apr	Wizz Air
30 Mar - 03 Apr	easyJet	direct
30 Mar - 10 Apr	easyJet	direct
28 Mar - 04 Apr	Wizz Air UK
28 Mar - 06 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 91€

Return flights