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

Return flights

06 Jul - 13 Jul	Air France
07 Jul - 15 Jul	Air France
05 Jul - 13 Jul	Virgin Atlantic
07 Jul - 14 Jul	KLM
13 Jul - 20 Jul	Southwest Airlines
08 Jul - 15 Jul	Southwest Airlines
06 Jul - 14 Jul	Delta
08 Jul - 16 Jul	Southwest Airlines
09 Jul - 17 Jul	Virgin Atlantic
16 Jul - 23 Jul	Southwest Airlines

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

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 July from 696€

Return flights