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

Return flights

30 Mar - 07 Apr	Scandinavian Airlines
02 Mar - 10 Mar	Icelandair	direct
10 Mar - 13 Mar	Ryanair
30 Mar - 06 Apr	Scandinavian Airlines
10 Mar - 13 Mar	Icelandair	direct
30 Mar - 05 Apr	Scandinavian Airlines
29 Mar - 04 Apr	Icelandair	direct
30 Mar - 06 Apr	Icelandair	direct
30 Mar - 07 Apr	Icelandair	direct
28 Mar - 05 Apr	Icelandair	direct
30 Mar - 05 Apr	Icelandair	direct
28 Mar - 11 Apr	Aer Lingus
15 Mar - 19 Mar	Ryanair
27 Mar - 30 Mar	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 $239

Return flights