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

Return flights

23 Mar - 26 Mar	Ryanair
09 Mar - 26 Mar	Ryanair
03 Mar - 14 Mar	Aer Lingus
08 Mar - 14 Mar	Aer Lingus
09 Mar - 21 Mar	Ryanair
14 Mar - 18 Mar	Ryanair
11 Mar - 19 Mar	Ryanair
12 Mar - 19 Mar	Ryanair
16 Mar - 20 Mar	Ryanair
12 Mar - 18 Mar	Ryanair
25 Mar - 08 Apr	Ryanair
26 Mar - 04 Apr	Aer Lingus
29 Mar - 04 Apr	Ryanair
26 Mar - 02 Apr	Aer Lingus
21 Mar - 04 Apr	Ryanair
31 Mar - 07 Apr	Ryanair
30 Mar - 05 Apr	Ryanair
31 Mar - 04 Apr	Ryanair
30 Mar - 04 Apr	Aer Lingus
29 Mar - 02 Apr	Ryanair

Also check the deals for one-way flights from Dublin 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 Dublin to Keflavik in March from 170€

Return flights