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

Return flights

21 Jul - 28 Jul	Spirit Airlines
20 Jul - 27 Jul	Spirit Airlines
09 Jul - 16 Jul	Spirit Airlines
24 Jul - 31 Jul	Spirit Airlines
10 Jul - 17 Jul	Spirit Airlines
12 Jul - 19 Jul	Air France	direct
14 Jul - 21 Jul	Air France	direct
20 Jul - 27 Jul	Air France	direct
21 Jul - 28 Jul	Air France	direct
08 Jul - 15 Jul	Southwest Airlines
25 Jul - 01 Aug	Spirit Airlines
25 Jul - 01 Aug	Air France	direct

Also check the deals for one-way flights from Detroit 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 Detroit to Keflavik in July from $758

Return flights