AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Keflavik (KEF) in March 2026 (see full year).

Return flights

04 Mar - 11 Mar	Spirit Airlines
10 Mar - 17 Mar	Frontier Airlines
11 Mar - 18 Mar	Frontier Airlines
09 Mar - 15 Mar	Spirit Airlines
15 Mar - 25 Mar	Spirit Airlines
12 Mar - 19 Mar	Frontier Airlines
09 Mar - 13 Mar	Frontier Airlines
25 Mar - 01 Apr	Spirit Airlines
09 Mar - 16 Mar	Frontier Airlines
31 Mar - 07 Apr	Frontier Airlines
06 Mar - 13 Mar	Spirit Airlines
30 Mar - 06 Apr	Frontier Airlines
26 Mar - 02 Apr	Frontier Airlines
06 Mar - 14 Mar	jetBlue
27 Mar - 03 Apr	Frontier Airlines
28 Mar - 04 Apr	Frontier Airlines

Also check the deals for one-way flights from Dallas-Fort Worth 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 Dallas-Fort Worth to Keflavik in March from $525

Return flights