Cheapest return MDW–KEF flights, December

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

Return flights

13 Dec - 20 Dec Southwest Airlines
14 Dec - 21 Dec Southwest Airlines
15 Dec - 22 Dec Southwest Airlines
16 Dec - 23 Dec Southwest Airlines
18 Dec - 25 Dec Southwest Airlines
17 Dec - 24 Dec Southwest Airlines
29 Dec - 04 Jan Southwest Airlines
24 Dec - 31 Dec Southwest Airlines
29 Dec - 02 Jan Southwest Airlines
29 Dec - 03 Jan Southwest Airlines
29 Dec - 31 Dec Southwest Airlines
27 Dec - 03 Jan Southwest Airlines
24 Dec - 02 Jan Southwest Airlines
28 Dec - 02 Jan Southwest Airlines
25 Dec - 01 Jan Southwest Airlines
29 Dec - 01 Jan Southwest Airlines
26 Dec - 02 Jan Southwest Airlines

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

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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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