Cheapest return flights from Chicago to Keflavik in March from 729€

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

Return flights

03 Mar - 10 Mar Southwest Airlines
17 Mar - 24 Mar Southwest Airlines
10 Mar - 17 Mar Southwest Airlines
24 Mar - 31 Mar Southwest Airlines
30 Mar - 06 Apr KLM
25 Mar - 01 Apr Southwest Airlines
31 Mar - 07 Apr KLM
11 Mar - 15 Mar Southwest Airlines
27 Mar - 04 Apr WestJet
28 Mar - 04 Apr WestJet
21 Mar - 28 Mar Porter Airlines (Canada) Ltd
04 Mar - 09 Mar Southwest Airlines
27 Mar - 03 Apr Porter Airlines (Canada) Ltd
23 Mar - 30 Mar Porter Airlines (Canada) Ltd
09 Mar - 16 Mar Porter Airlines (Canada) Ltd
26 Mar - 02 Apr Porter Airlines (Canada) Ltd
08 Mar - 15 Mar Porter Airlines (Canada) Ltd
29 Mar - 05 Apr Porter Airlines (Canada) Ltd
27 Mar - 05 Apr Frontier Airlines

Also check the deals for one-way flights from Chicago to Keflavik in March.

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