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

Return flights

28 Jul - 04 Aug	Spirit Airlines
29 Jul - 05 Aug	Spirit Airlines
25 Jul - 01 Aug	Spirit Airlines
28 Jul - 04 Aug	Air France	direct
29 Jul - 05 Aug	Air France	direct
27 Jul - 03 Aug	Spirit Airlines
26 Jul - 02 Aug	Air Canada
30 Jul - 06 Aug	Air France
27 Jul - 03 Aug	Air France	direct
26 Jul - 02 Aug	Air France	direct
06 Jul - 10 Jul	Sun Country Airlines
04 Jul - 11 Jul	Southwest Airlines
06 Jul - 10 Jul	Delta	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 636€

Return flights