AirHint found the following cheapest return flights from Minneapolis (MSP) to Keflavik (KEF) in September 2025 (see full year).

Return flights

11 Sep - 18 Sep	Air Canada
15 Sep - 23 Sep	KLM
19 Sep - 22 Sep	United
08 Sep - 15 Sep	United
21 Sep - 25 Sep	Icelandair	direct
15 Sep - 23 Sep	Icelandair	direct
08 Sep - 15 Sep	Icelandair	direct
19 Sep - 22 Sep	Icelandair	direct
11 Sep - 18 Sep	Icelandair	direct

Also check the deals for one-way flights from Minneapolis to Keflavik in September.

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 Minneapolis to Keflavik in September from $434

Return flights