Cheapest return flights from Chicago to Keflavik in October from 778€

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

Return flights

01 Oct - 09 Oct Southwest Airlines
17 Oct - 24 Oct Southwest Airlines
22 Oct - 29 Oct Southwest Airlines
21 Oct - 30 Oct Southwest Airlines
23 Oct - 30 Oct Southwest Airlines
27 Oct - 03 Nov WestJet
28 Oct - 04 Nov WestJet
25 Oct - 01 Nov WestJet

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

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