AirHint found the following cheapest return flights from Chicago (MDW) to Keflavik (KEF) in November 2025 (see full year).

Return flights

17 Nov - 24 Nov	Southwest Airlines
19 Nov - 26 Nov	Southwest Airlines
13 Nov - 18 Nov	Southwest Airlines
15 Nov - 19 Nov	Southwest Airlines
04 Nov - 12 Nov	Southwest Airlines
13 Nov - 19 Nov	Southwest Airlines
28 Nov - 03 Dec	Southwest Airlines
16 Nov - 23 Nov	Southwest Airlines
21 Nov - 01 Dec	Southwest Airlines
22 Nov - 30 Nov	Southwest Airlines

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

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 Chicago to Keflavik in November from 769€

Return flights