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

Return flights

04 Mar - 09 Mar	Aer Lingus
03 Mar - 07 Mar	Ryanair
11 Mar - 16 Mar	Ryanair
02 Mar - 05 Mar	Ryanair
11 Mar - 18 Mar	Ryanair
17 Mar - 21 Mar	Ryanair
01 Mar - 05 Mar	Ryanair
02 Mar - 06 Mar	Ryanair
01 Mar - 04 Mar	Ryanair
08 Mar - 11 Mar	Ryanair
24 Mar - 01 Apr	Ryanair
23 Mar - 01 Apr	Ryanair
30 Mar - 13 Apr	Scandinavian Airlines
31 Mar - 04 Apr	Icelandair	direct
31 Mar - 03 Apr	Icelandair	direct
25 Mar - 12 Apr	Icelandair	direct
30 Mar - 13 Apr	Icelandair	direct
29 Mar - 05 Apr	Icelandair	direct
23 Mar - 01 Apr	Icelandair	direct
31 Mar - 09 Apr	Icelandair	direct

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 145€

Return flights